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Vig (Vigorish / Juice)

The bookmaker's commission embedded in betting odds — the amount taken from every bet to ensure the bookmaker profits regardless of outcome.

What Is Vig (Vigorish) in Sports Betting?

Vig (short for vigorish, also called juice) is the commission embedded in betting odds that ensures bookmakers profit regardless of the outcome of an event. It is the fee sportsbooks charge for accepting your wager and taking on the risk of your bet. Without vig, betting would be a zero-sum game between bettors and sportsbooks — but with vig built into every line, the sportsbook guarantees itself a percentage of all money wagered.

The vig is invisible to casual bettors because it's not charged as a separate fee. Instead, it's baked directly into the odds. When you see a point spread at -110, you're already paying the vig. When you place a bet on a moneyline at -150, the vig is already factored in. Understanding how vig works is essential for any bettor who wants to maximize long-term profitability.

The Basic Definition and Purpose

In its simplest form, vig is the bookmaker's guarantee of profit. Imagine a perfectly balanced two-outcome event — say, a coin flip. Without vig, both sides would be priced at 2.0 (evens), representing a 50% implied probability for each outcome. The probabilities sum to 100%, leaving no profit for the sportsbook.

A bookmaker adds vig by repricing both sides to 1.909. Now each side represents a 52.4% implied probability. The probabilities sum to 104.8%. That 4.8% excess is the vig — the sportsbook's built-in profit margin.

Here's a concrete example: Two bettors place £100 each on opposite sides of a coin flip at 1.909 odds. The sportsbook collects £200 in total bets but pays out £190.90 to the winner (£100 × 1.909). The sportsbook keeps £9.10 regardless of which side wins. Over thousands of such bets, this small margin compounds into substantial profit.

Why Is It Called "Vig"?

The term "vig" has a fascinating etymological history rooted in early 20th-century gambling culture. The word comes from the Russian "vyigrysh" (вы́игрыш), meaning "winnings" or "gain." It entered English through Yiddish slang ("vigrish"), which was spoken widely among Jewish immigrants in New York and other major American cities during the 1920s-1940s. These communities were heavily involved in underground gambling, loan sharking, and sports betting — contexts where the term "vig" became synonymous with the commission or interest charged.

The term spread from Yiddish into broader American gambling and sports betting vernacular, where it remains the dominant American slang term. It eventually became formalized in the sports betting industry, though regional and international variations exist (see table below).

Region/Context Primary Term Alternative Terms Definition
United States Vig / Vigorish Juice, the cut, the take Bookmaker's commission embedded in odds
United Kingdom Overround Margin, the book Excess implied probability above 100%
International Margin Overround, cut Sportsbook's profit margin
Betting Exchanges Commission Fee, take Percentage charged on winning bets
Casino Games Vig / Commission House cut, rake Fee on winning bets (e.g., pai gow poker)

The term "juice" is equally common in American sports betting and carries the same meaning as vig. Both terms reflect the idea that sportsbooks are "squeezing juice" (profit) out of every bet placed.

Vig vs. Juice vs. Margin vs. Overround — Are They the Same?

Yes and no. These terms refer to the same underlying concept but are used differently depending on context and region.

Vig (vigorish) and juice are American slang terms for the bookmaker's commission. They're functionally identical and often used interchangeably. "Vig" is slightly more formal, while "juice" is more colloquial.

Overround is the British term for the same concept. It refers to the fact that the sum of implied probabilities exceeds 100%. For example, a betting line with a 104% implied probability has 4% overround.

Margin is the international term, particularly common in European betting markets. It simply refers to the sportsbook's profit margin.

House edge is a broader term that encompasses the sportsbook's mathematical advantage, which is derived from the vig/overround.

The critical distinction is between vig (the fee itself) and overround (the mechanism by which vig is collected). Overround is how sportsbooks charge vig — by inflating the implied probabilities above 100%. But the terms are often used interchangeably in casual betting discussions.


How Does Vig Work in Sports Betting?

Understanding the mechanics of vig is crucial because it directly affects your odds, your payouts, and your long-term profitability.

The Mechanism: How Sportsbooks Build Vig Into Odds

Sportsbooks start with "true odds" — the odds that reflect the actual probability of an outcome. For example, if a team has a true 50% chance of winning, the true odds are 2.0 (evens, or -100 in American odds).

The sportsbook then adds vig by adjusting these true odds to make them slightly worse for the bettor. Instead of 2.0, they might offer 1.909 (or -110 in American odds). This adjustment inflates the implied probability from 50% to 52.38%.

When a sportsbook prices both sides of an event, the overround (the sum of implied probabilities minus 100%) equals the vig they're charging.

Example: A perfectly balanced market

Outcome True Odds True Probability Sportsbook Odds Implied Probability
Team A 2.0 50% 1.909 52.38%
Team B 2.0 50% 1.909 52.38%
Total Probability 100% 104.76%
Vig 0% 4.76%

In this scenario, the sportsbook has added 4.76% vig by repricing both sides.

Now imagine two bettors place equal bets (£100 each) on opposite sides at 1.909:

  • Total money collected: £200
  • Payout to winner: £190.90 (£100 × 1.909)
  • Sportsbook profit: £9.10
  • Profit as percentage: £9.10 / £200 = 4.55% ✓

This is the vig in action. The sportsbook profits 4.55% regardless of which side wins.

Vig in Point Spreads vs. Moneylines vs. Over/Unders

Different bet types carry different vig amounts, though the principle is the same.

Point Spreads (the -110 standard)

In US sports, point spread bets are typically priced at -110 on both sides. This is the industry standard for balanced markets.

  • -110 odds = 52.38% implied probability
  • Both sides at -110 = 104.76% total probability = 4.76% vig

To win £100, you must risk £110. If two bettors take opposite sides at -110, the sportsbook collects £220 and pays £210 to the winner, keeping £10. This is the standard vig for point spreads.

Moneylines

Moneylines often carry higher vig because the outcomes are more imbalanced. A favorite might be priced at -200 (66.67% implied probability) while the underdog is +150 (40% implied probability). Total probability: 106.67% — a 6.67% vig.

Over/Unders (Totals)

Over/under bets are typically priced at equal odds (usually -110 on both sides), making them good benchmarks for comparing sportsbook vig across different books.

Odds on Both Sides Implied Probability Each Total Probability Vig %
-105 51.22% 102.44% 2.44%
-110 52.38% 104.76% 4.76%
-115 53.49% 106.98% 6.98%
-120 54.55% 109.09% 9.09%
-125 55.56% 111.11% 11.11%

This table shows why comparing sportsbooks on their over/under vig is useful — it's a standardized way to measure each book's baseline margin.

How Sportsbooks Adjust Vig as Action Comes In

Vig is not static. As bettors place money, sportsbooks adjust odds to balance their liability and manage risk. This can increase or decrease the vig on a particular line.

Example: Line movement due to action

A sportsbook opens a game at -110 on both sides. Early action is heavily on Team A (the public favorite). The sportsbook wants to encourage bettors to take Team B to balance their exposure. They move the line to -120 on Team A and -110 on Team B.

Now the vig is asymmetrical:

  • Team A: -120 = 54.55% probability
  • Team B: -110 = 52.38% probability
  • Total: 106.93% probability = 6.93% vig (up from 4.76%)

By moving the line, the sportsbook has increased the vig on the favorite to discourage further action and attract Team B bets. This is a deliberate strategy to manage liability.


How to Calculate Vigorish

Calculating vig is essential for serious bettors who want to identify value and compare sportsbooks. There are two main methods.

Method 1: The Implied Probability Method

This is the most straightforward approach.

Step 1: Convert odds to implied probability

For decimal odds (common in Europe):

  • Implied Probability = 1 / Decimal Odds

For American odds:

  • Negative odds: Probability = |Odds| / (|Odds| + 100)
  • Positive odds: Probability = 100 / (Odds + 100)

Step 2: Add the implied probabilities from both sides

Step 3: Subtract 100%

The result is the vig percentage.

Example: Calculating vig for -110 odds

  • Implied probability of -110: 110 / (110 + 100) = 110 / 210 = 52.38%
  • Both sides at -110: 52.38% + 52.38% = 104.76%
  • Vig: 104.76% - 100% = 4.76%

Example: Calculating vig for a moneyline

Team A: -200 (implied probability = 200 / 300 = 66.67%)
Team B: +150 (implied probability = 100 / 250 = 40%)
Total probability: 66.67% + 40% = 106.67%
Vig: 6.67%

Bet Type Odds A Odds B Prob A Prob B Total Prob Vig %
Point Spread -110 -110 52.38% 52.38% 104.76% 4.76%
Moneyline -200 +150 66.67% 40.00% 106.67% 6.67%
Over/Under -105 -105 51.22% 51.22% 102.44% 2.44%
Tight Match -120 -110 54.55% 52.38% 106.93% 6.93%

Method 2: The Overround Method (For Removing Vig)

This method is useful when you want to calculate the "true" or "no-vig" odds.

Step 1: Calculate the sum of implied probabilities (S)

Step 2: Divide each implied probability by S

This gives you the "fair" probability (what the odds would be without vig).

Step 3: Convert back to odds

Example: Removing vig from -110 odds

  • Sum of probabilities: 104.76%
  • Fair probability for each side: 52.38% / 104.76% = 50%
  • Fair odds for 50% probability: 2.0 (or -100 in American odds)

This shows that the "true" odds for a 50-50 proposition are 2.0, but sportsbooks offer 1.909 (-110) to incorporate the vig.

Using a Vig Calculator

For quick calculations, online vig calculators are invaluable. Simply enter the odds for both sides, and the calculator displays the vig percentage and fair odds. Popular tools include:

  • OddsJam Vig Calculator
  • BettorEdge Vig Calculator
  • ProfitDuel Vig Calculator
  • Topend Sports Vig Calculator

These tools save time and eliminate calculation errors, especially when comparing multiple sportsbooks.


What Are Typical Vig Rates Across Different Markets?

Vig is not uniform. It varies significantly based on the sport, the market, the sportsbook, and the bet type.

Standard Vig Ranges

On major betting markets (NFL, NBA, Premier League), typical vig ranges from 3% to 6%. On minor or exotic markets, vig can reach 10-20% or higher.

Market Type Typical Vig Range Example
Major Sports 3-6% NFL point spreads (-110) = 4.76%
Secondary Markets 5-8% Niche soccer leagues, lower-profile matches
Exotic/Prop Bets 8-15% Player props, live betting, niche outcomes
High-Volume Markets 2-4% Betting exchanges, major moneylines
Live Betting 6-10% Odds change rapidly; higher vig to manage risk

Vig Across Different Sports

Different sports have different standard vig levels:

Sport Primary Bet Type Typical Vig Notes
NFL Point Spread 4-5% (-110 standard) Most liquid market, lowest vig
NBA Point Spread 4-5% (-110 standard) Very liquid, tight spreads
MLB Moneyline 5-7% Higher vig due to imbalanced lines
NHL Moneyline 5-7% Similar to MLB
Soccer Moneyline (1X2) 4-6% Varies by league and sportsbook
Tennis Moneyline 5-8% Lower liquidity = higher vig
Horse Racing Win/Place/Show 15-20% Track takes significant cut

Vig in Betting Exchanges vs. Traditional Sportsbooks

Betting exchanges (like Betfair) operate on a different model than traditional sportsbooks. Instead of setting odds with built-in vig, exchanges allow bettors to set their own odds and charge a commission on winning bets (typically 1-5%).

Traditional Sportsbook:

  • Vig built into odds (usually 4-6%)
  • Fixed odds set by the sportsbook
  • Sportsbook profits from vig, not from bettors losing

Betting Exchange:

  • Commission on winners (usually 2-5%)
  • Odds set by bettors (market-driven)
  • Exchange profits from volume, not outcome

For bettors with an edge, betting exchanges often offer better value because:

  1. Odds are typically sharper (less vig/commission)
  2. You can bet at odds set by other bettors, not the sportsbook
  3. You can "lay" (bet against) outcomes

However, exchanges have lower liquidity on niche markets, so vig can actually be higher on obscure events.

Sportsbook Comparison: Low-Vig vs. High-Vig Books

Sportsbooks vary dramatically in their vig levels:

Sportsbook Type Typical Vig Characteristics
Value/Sharp Books 2-3% Betting exchanges, premium sportsbooks targeting professionals
Mid-Tier Online Books 4-5% Most major online sportsbooks (good value for casual bettors)
Retail/In-Person Books 5-7% Physical sportsbooks, lower volume = higher vig
Premium/Niche Markets 10-20% Prop bets, exotic markets, live betting

The difference between a 2% vig book and a 5% vig book is substantial over time. If you bet £10,000 per month:

  • At 2% vig: You lose £200/month to vig (assuming no edge)
  • At 5% vig: You lose £500/month to vig

Over a year, that's £3,600 in extra losses.


How Does Vig Affect Your Long-Term Betting Profitability?

Vig is the biggest obstacle to long-term betting success. Understanding its impact is essential.

The Break-Even Hurdle

To break even in sports betting, you must overcome the vig. Here's how:

At 4.76% vig (standard -110), you must win 52.38% of your bets to break even (assuming equal bet sizes and odds).

This is because:

  • You win 52.38% of bets, gaining 4.76% profit per win
  • You lose 47.62% of bets, losing 100% per loss
  • Net: (0.5238 × 4.76%) + (0.4762 × -100%) ≈ 0%
Vig % Break-Even Win Rate Interpretation
2% 51% You need just 51% wins to break even
4.76% 52.38% Standard -110 vig; need 52.38% wins
5% 52.63% Slightly higher vig; need 52.63% wins
10% 55.56% High vig; need 55.56% wins to break even
15% 60% Very high vig; need 60% wins to break even

The vig creates a "break-even hurdle" — you must overcome it before you can profit. Most casual bettors don't have a 52.38% win rate, so they lose money over time.

Vig as a Profitability Hurdle

Let's say you have a genuine 55% win rate (a significant edge). How much do you profit?

At 4.76% vig (-110 odds):

  • Win rate: 55%
  • Break-even rate: 52.38%
  • Net edge: 55% - 52.38% = 2.62%
  • On £10,000 wagered: £262 profit

At 2% vig:

  • Break-even rate: 51%
  • Net edge: 55% - 51% = 4%
  • On £10,000 wagered: £400 profit

By reducing vig from 4.76% to 2%, you increase profit by 53% (from £262 to £400). This is why shopping for better odds matters so much.

Real-World Scenarios: The Impact of Vig Reduction

Scenario: A serious bettor with a 55% win rate

Sportsbook Vig Annual Wagered Annual Profit (55% WR) Impact of Vig
2% £50,000 £2,000 Baseline
4.76% £50,000 £1,310 -34.5% profit loss
6% £50,000 £1,190 -40.5% profit loss
10% £50,000 £728 -63.6% profit loss

A 3-4 percentage point difference in vig can reduce annual profits by 30-40%. This is why professional bettors spend significant time finding the lowest vig sportsbooks.

The Cumulative Effect Over Time

Vig compounds over time. At 4.76% vig with no edge (50% win rate):

Time Period Amount Wagered Vig Cost Cumulative Loss
1 Month £5,000 £238 £238
3 Months £15,000 £714 £714
1 Year £60,000 £2,856 £2,856
3 Years £180,000 £8,568 £8,568
5 Years £300,000 £14,280 £14,280

Without a positive edge, vig is a tax on your betting. The longer you bet, the more you lose to vig.


How to Find Low-Vig Bookmakers and Reduce Your Costs

Reducing vig is one of the most effective ways to improve long-term profitability. Here are practical strategies.

Strategy 1: Shop Across Multiple Sportsbooks

Different sportsbooks price lines differently. By comparing odds across multiple books, you can often find better prices.

Example: Shopping for better odds

Sportsbook Team A Odds Team B Odds Implied Vig
Book A -110 -110 4.76%
Book B -105 -105 2.44%
Book C -115 -115 6.98%

Book B offers 2.32 percentage points lower vig. On a £10,000 bet, that's £232 in savings. Over a year of betting, this difference is enormous.

Serious bettors use odds comparison tools (like OddsJam, Covers, or ESPN) to quickly identify the best available odds across all sportsbooks.

Strategy 2: Use Low-Margin Sportsbooks

Some sportsbooks consistently offer lower vig across the board:

  • Betting exchanges (Betfair, DraftKings exchange) typically charge 2-5% commission
  • Sharp sportsbooks (targeting professional bettors) offer 2-3% vig on major markets
  • Online sportsbooks generally offer lower vig than retail/in-person books

The trade-off is that sharp books have:

  • Lower bonuses and promotions
  • Stricter bet limits (they don't want to lose money to professionals)
  • Less user-friendly interfaces

But if you have an edge, the lower vig is worth it.

Strategy 3: Leverage Betting Exchanges

Betting exchanges offer lower vig than traditional sportsbooks on liquid markets. The downside is that less liquid markets have higher commission (and wider bid-ask spreads).

When to use exchanges:

  • Major markets with high liquidity (NFL, Premier League, major tennis)
  • When you want to "lay" bets (bet against outcomes)
  • When sportsbook limits are an issue

When to avoid exchanges:

  • Niche markets with low liquidity
  • Live betting (fast-moving odds, wide spreads)

Strategy 4: Use Bonuses and Promotions Strategically

Free bets and odds boosts effectively reduce your vig.

Free bet example:

  • Sportsbook offers £50 free bet on a -110 bet
  • You bet £50 on Team A at -110
  • If you win: You gain £45.45 (£50 × 1.909 - £50)
  • The free bet has no vig cost because you didn't risk your own money

Odds boost example:

  • Standard odds: Team A at -110 (52.38% probability)
  • Boosted odds: Team A at -105 (51.22% probability)
  • The boost effectively reduces vig by 1.16 percentage points

Smart bettors maximize value by using bonuses on bets they would place anyway, not on inflated-probability bets they wouldn't normally take.

Strategy 5: Focus on Markets with Natural Low Vig

Some markets inherently have lower vig because of high volume and competition:

  • NFL point spreads: 4-5% vig (most liquid sport)
  • NBA point spreads: 4-5% vig
  • Over/unders: Usually lower vig than moneylines
  • Major soccer matches: 3-5% vig

Conversely, avoid high-vig markets unless you have a very strong edge:

  • Prop bets: 8-15% vig
  • Niche sports: 10-20% vig
  • Live betting: 6-10% vig
  • Futures bets: 10-15% vig

Common Misconceptions About Vig

Misconception 1: "Vig Only Applies When You Lose"

False. Vig is built into the odds regardless of outcome. Even when you win, you're paying vig.

When you bet £100 at -110 and win, you receive £190.90 — not £200. The £9.10 difference is the vig you paid. The sportsbook keeps the vig from both winning and losing bets; it's just that losing bets are entirely forfeited.

Misconception 2: "All Sportsbooks Charge the Same Vig"

False. Vig varies significantly across sportsbooks and markets. Shopping for better odds can save you 2-5 percentage points of vig, which compounds into substantial savings over time.

Misconception 3: "You Can Avoid Vig Entirely"

False. Vig is unavoidable in traditional sportsbooks. Every bet has vig built in. The only way to "avoid" vig is to have a positive edge that overcomes it, or to use betting exchanges where you set your own odds (though you still pay commission).

Misconception 4: "Vig Is the Only Reason I Lose Money"

Partially true. Vig is a major obstacle, but it's not the only reason bettors lose. Poor selection, lack of discipline, and betting without an edge are equally important factors. Even with low vig, a bettor without an edge will lose money over time.

Misconception 5: "Betting Exchanges Have No Vig"

False. Betting exchanges don't have built-in vig, but they charge commission on winning bets (typically 2-5%). This is functionally similar to vig — it's a cost you pay to place bets.


Vig in Different Contexts: Beyond Sports Betting

While vig is most commonly associated with sports betting, the concept (and sometimes the term) appears in other gambling and financial contexts.

Vig in Casino Games

In casino games, vig takes the form of a commission or house edge:

Pai Gow Poker:

  • Sportsbooks charge a 5% commission on all winning bets
  • This is explicitly called "vigorish"
  • Unlike baccarat, the commission is paid after each winning hand

Baccarat:

  • Typically charges 5% commission on "Banker" wins
  • No commission on "Player" wins (which have lower probability)
  • This asymmetric commission is the house's vig

Blackjack:

  • The house edge (vig equivalent) comes from the rules, not a direct commission
  • Typical house edge: 0.5-1% with basic strategy

Vig in Loan Sharking and Financial Contexts

Historically, "vigorish" referred to excessive interest charged by loan sharks on illegal loans. This usage is less common today but still appears in crime fiction and historical contexts.

  • Illegal lending: Vigorish was the interest rate (often 10-50% annually or more) charged on loans from organized crime figures
  • Legal high-interest loans: Modern payday loans and title loans sometimes use "vig" colloquially to describe their fees

The connection between betting vig and loan shark vig is etymological and conceptual — both represent a commission or fee extracted by the lender/bookmaker.


Frequently Asked Questions About Vig

What's the difference between vig and overround?

Vig is the fee itself; overround is the mechanism by which sportsbooks collect it. Overround is the excess implied probability above 100%. For example, a line with 104% total implied probability has 4% overround, which translates to approximately 4% vig. They're closely related but technically distinct concepts.

Can I calculate vig without knowing the true odds?

No. You need the sportsbook's odds for both sides to calculate vig. You can calculate the implied probability from odds alone, but to determine vig, you must compare the sportsbook's probabilities to a theoretical 100% (fair odds).

Is vig the same in every sport?

No. Vig varies by sport, market, and sportsbook. NFL point spreads typically have 4-5% vig, while niche sports or exotic bets can have 10-20% vig. Always compare vig across sports and markets.

How do sharp bettors use vig to find value?

Sharp bettors look for situations where:

  1. They have a genuine edge (e.g., 55% win rate on a 52% break-even bet)
  2. The vig is low (they shop for the best odds)
  3. The combination of edge + low vig = profitable over time

They also identify "mispriced" lines where the sportsbook's implied probability differs significantly from their own assessment, and the vig is low enough to justify the bet.

Does vig apply to live betting?

Yes, but live betting typically has higher vig (6-10%) because odds change rapidly and sportsbooks must manage real-time risk. The wider bid-ask spread (difference between buy and sell prices) reflects this higher vig.

Can I get a refund on vig if my bet loses?

No. Vig is non-refundable. When you lose a bet, you lose your entire stake, which includes the vig. Vig is only "recovered" when you win a bet, and even then, it's deducted from your payout.

How do sportsbooks decide what vig to charge?

Sportsbooks set vig based on:

  • Market liquidity: High-volume markets get lower vig due to competition
  • Perceived risk: Uncertain outcomes get higher vig
  • Competitive pressure: If competitors offer lower vig, they must match it
  • Regulatory environment: Some jurisdictions cap vig; others don't
  • Target market: Sharp books offer lower vig; casual books offer higher vig

Is it worth switching sportsbooks to save 1-2% vig?

Yes, absolutely. Over time, 1-2% vig savings compounds into significant profit differences. A bettor wagering £50,000 annually saves £500-£1,000 by switching to a book with 1-2% lower vig. For serious bettors, this is worth the effort.

What's the lowest vig available in sports betting?

On major markets (NFL, NBA, Premier League), the lowest vig is typically 2-3% at sharp sportsbooks or betting exchanges. On niche markets, vig rarely drops below 5-8%. On exotic prop bets, vig can be 15%+ and is often unavoidable.

Does vig affect parlay bets differently?

Yes. Parlay vig compounds. Each leg of a parlay has its own vig, and because you're multiplying odds together, the cumulative vig effect is larger. A 3-leg parlay at -110 each has approximately 14% total vig (not 4.76% × 3). This is why parlays are less attractive for value-conscious bettors.


Summary: Vig Is Everything

Vig is the most fundamental concept in sports betting. It's the reason sportsbooks profit, the reason most bettors lose, and the biggest obstacle to long-term success.

To summarize:

  1. Vig is the bookmaker's commission — built into odds, not charged separately
  2. Standard vig is 4-6% on major markets, higher on niche markets
  3. You must overcome vig to profit — at 4.76% vig, you need 52.38% wins just to break even
  4. Shopping for low vig matters — reducing vig by 2-3% can increase annual profits by 30-40%
  5. Vig is unavoidable — every bet has it; the only mitigation is having a positive edge and betting at the lowest available vig

Whether you're a casual bettor or a professional, understanding and minimizing vig is essential to long-term success.

Frequently Asked Questions

What does vig mean in sports betting?

Vig (short for vigorish, also called juice) is the bookmaker's commission embedded in betting odds. It's the fee sportsbooks charge for accepting your wager, ensuring they profit regardless of the outcome. On a typical point spread at -110, the vig is approximately 4.5%.

How much vig do standard bookmakers charge?

On major markets, typical vig ranges from 3% to 10%. Point spread bets in US sports are often set at -110 on both sides — this creates approximately 4.5% vig. High-margin niche markets can carry 10-20% vig. Value sportsbooks may offer -105 (2.38% vig), while premium events might demand -125 (9.99% vig).

Is vig the same as margin and overround?

Essentially yes. Vig (American term), margin (international), overround (British), juice (American slang), and house edge are all names for the same concept: the excess implied probability above 100% built into the odds. The difference is terminology — overround is the mechanism by which sportsbooks collect the vig.

How do I calculate vigorish?

Convert both odds to implied probability, then add them together. If the sum exceeds 100%, the difference is the vig. For example, -110 odds = 52.38% implied probability on each side. Adding both sides: 52.38% + 52.38% = 104.76%, meaning 4.76% vig. Alternatively, use a vig calculator with both sides' odds.

How can I find low-vig bookmakers?

Low-margin sportsbooks consistently offer the lowest vig — typically 2-3% compared to 5-10% at retail books. Use odds comparison tools to find the best price on each bet. Betting exchanges typically charge commission (1-5%) instead of built-in vig. Shopping across multiple sportsbooks for each bet is the most effective strategy.

Does vig affect my long-term returns?

Significantly. At 5% vig with no edge, you lose 5% of every pound staked over the long run. At 2% vig, you lose 2%. This means you must overcome the vig with a positive edge to profit long-term. Reducing vig by 2-3 percentage points through better odds shopping materially improves long-term returns.

Why is it called 'vig'?

The term comes from Russian 'vyigrysh' (meaning 'winnings' or 'gain'), which entered English via Yiddish slang ('vigrish'). It became common in American gambling and sports betting terminology in the 20th century, alongside slang terms like 'juice,' 'the cut,' and 'the take.'

Related terms