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Exchange Commission

Exchange commission comes off your winnings, not your stake. This is what that does to the price.

The price shown on the exchange, before commission.

%

Charged on net winnings. Typically 2–5%, lower at high volume.

$

Commission is applied to net winnings on this bet, which is the standard back-bet convention. Exchanges that charge on market net profit — where a loss elsewhere in the same market offsets this win — will pay you slightly more than this shows.

Effective price

2.900

+190 after commission, down from 3.000. Commission takes 5% of the profit, which is less than 5% of the price — the stake comes back untouched.

Gross profit
$200.00
Commission
−$10.00
Net profit
$190.00
Total returned
$290.00

Stake back plus net profit.

Effective American
+190
Break-even rate before
33.33%
Break-even rate after
34.48%

Commission raises the win rate you need. This is the real cost of trading on an exchange.

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What is betting exchange commission?

A betting exchange matches bettors against each other rather than taking the other side itself, and charges commission on your net winnings instead of building a margin into the price.

So the displayed price is real, but what you are paid is lower. Five per cent commission on a 3.00 shot does not make it 2.85 — it takes 5% of the $2 profit per dollar staked, leaving an effective 2.90. Losing bets are not charged at all.

Even after the fee, exchanges usually beat sportsbooks on liquid markets: a typical −110 line holds around 4.5%, an exchange at even money with 5% commission around 2.5%.

How it works

A betting exchange does not build a margin into its prices the way a sportsbook does. Instead it charges commission on what you win. The displayed price is real, but the price you are actually paid is lower, and the gap is where the exchange makes its money.

The key detail is that commission is charged on net winnings, not on the total return. Your stake comes back untouched. So 5% commission on a 3.00 shot does not make it 2.85 — it takes 5% of the $2 profit per dollar staked, leaving $1.90, for an effective price of 2.90. That is the same arithmetic as a profit boost, run in reverse.

Which means commission, like a boost, matters more at long prices than short ones. At 1.10 there is barely any profit to charge against and commission is nearly irrelevant. At 10.00 it takes 5% of nine units and moves the price to 9.55. Exchange bettors who specialise in longshots are paying far more commission per bet than the headline rate suggests.

Even after all that, exchanges usually beat sportsbooks on price. A two-way sportsbook market at −110 both sides holds around 4.5%; an exchange at 2.00 both sides with 5% commission costs about 2.5%. The comparison to make is not “commission versus no commission” but the effective price here against the best price you can find elsewhere — which is what the break-even rates are for.

The formula

gross profit   = stake × (decimal − 1)
commission     = gross profit × rate
net profit     = gross profit × (1 − rate)

effective decimal = 1 + (decimal − 1) × (1 − rate)
break-even rate   = 1 / effective decimal

  3.00 at 5%  →  1 + 2.00 × 0.95  =  2.90
  10.00 at 5% →  1 + 9.00 × 0.95  =  9.55

Commission scales the profit leg and leaves the stake alone — structurally identical to a negative profit boost.

A worked example

$100 at 3.00 with 5% commission. Gross profit is $200, commission is $10, net profit is $190, and you get $290 back in total.

The effective price is 2.90. The break-even rate rises from 33.3% to 34.5% — so commission has cost you about 1.2 percentage points of required accuracy on this bet.

Compare that with the same selection at −185 (1.541) at a sportsbook… no, compare like with like: 3.00 at an exchange after commission is 2.90, or +190. If your sportsbook shows +175 on the same selection, the exchange is still the better bet despite the fee. If it shows +200, it is not.

Common questions

Is commission charged on my stake?
No. It comes off net winnings only, and losing bets are not charged at all. That is why the effective price is always better than simply reducing the decimal odds by the commission rate.
Why does commission hurt more at long odds?
Because there is more profit to take a percentage of. At 1.10 the fee is trivial; at 10.00 it applies to nine units of profit per unit staked, and the effective price falls by nearly half a point.
Are exchanges cheaper than sportsbooks?
Usually, on liquid markets. A typical −110/−110 sportsbook market holds around 4.5%, while an exchange at even money with 5% commission costs about 2.5%. On thin markets the wider exchange spread can reverse that.
What about market-based commission?
Some exchanges charge on your net profit across a whole market rather than per bet, so losses on one selection offset wins on another. This calculator uses the per-bet convention, which is the more conservative of the two.
Does this apply to lay bets?
The commission arithmetic is the same — a percentage of net winnings — but the liability on a lay is the backer’s potential profit rather than your stake, so read the stake field as your liability at risk.

The guide behind this calculator

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For informational and analytical purposes only. These tools do not predict outcomes and do not recommend wagers.