Match rating in matched betting: what the percentage really means

A match rating is a quick way to compare a bookmaker's back odds with an exchange's lay odds. Higher usually means less value leaks out when you cover the same outcome. It is useful for sorting a long Oddsmatcher table. It is not the final answer.

The number that matters to your bankroll is the calculator's result in pounds: qualifying loss for a normal bet, or converted cash for a stake-not-returned free bet. Commission, stake, odds, liability and available exchange money all sit behind that figure. A handsome percentage cannot place the lay for you.

The short answer

OddsMonkey describes its normal rating as the share of the bookmaker stake retained after matching. On its example, a £10 bet at 98% produces a 20p qualifying loss.[4] Outplayed describes 100% as a perfect odds match and says closer back and lay prices reduce qualifying loss.[2]

That gives you a sensible reading rule:

• Normal or qualifying rating: an estimate of how much of your cash stake remains after the back and lay are balanced.
• SNR or free-bet rating: an estimate of how much of the free bet's face value becomes cash.

Always check which column or mode you are reading. The same back and lay prices can have a normal rating and a very different SNR rating because the free-bet stake is not returned.

What a normal rating means in pounds

For a £20 qualifying stake, a 98% rating suggests that 98% of £20 is retained. The cost is the missing 2%:

£20 × (100% − 98%) = £0.40 qualifying loss

Make the stake £50 and the same percentage costs £1.00. Nothing has gone wrong. The match is equally efficient, but the cash passing through it is larger.

This is why "only take 98%" is not a complete budget rule. On a small qualifying bet, the difference between 97% and 98% may be a few pence. On a larger stake, it deserves a proper look. Compare the loss with the reward the bet is meant to unlock, and use the calculator rather than estimating at checkout speed.

A checked 98% example

Take a hypothetical £20 back bet at 2.00, laid at 2.02 with 2% exchange commission. The balanced lay stake is £20.00. If the bookmaker bet wins, the £20 bookmaker profit is offset by £20.40 liability, leaving a 40p loss. If the lay wins, its £20 profit becomes £19.60 after commission, again leaving a 40p loss.

The retained amount is £19.60, which is 98% of the £20 stake. The calculator has translated a tidy percentage into the figure you can record.

Now keep the 98% result and £20 stake but use a longer hypothetical pair, back 6.00 and lay 6.02 at the same commission. The qualifying loss remains 40p, but the liability rises to £100.40. Rating measures efficiency. It does not tell you whether the exchange balance can carry the bet.

Smarkets' calculator instructions require the bet type, stake, back odds, lay odds and commission, then return the lay stake, liability and both outcomes.[5] Those outputs deserve the final glance, not the rating in isolation.

Why SNR rating is different

With a stake-not-returned free bet, the promotional stake disappears when the selection wins. Only the winnings are paid. The calculator therefore uses a different lay stake from a normal bet. Smarkets publishes separate formulas for qualifying and SNR bets,[5] while Outplayed defines SNR rating as the percentage of free-bet value locked in.[1]

Consider a hypothetical £20 SNR free bet at back odds of 6.00, lay odds of 6.20 and 2% commission. The checked result is:

• lay stake: £16.18;
• liability: £84.14;
• converted cash: about £15.86 in either outcome;
• SNR rating: about 79.3%.

If you treated those same prices as a normal £20 bet, the normal rating would be about 95.15% and the qualifying loss about 97p. Neither percentage is wrong. They answer different questions.

Outplayed's beginner guide suggests looking around 75% or more for an SNR free bet, but it also notes that higher free-bet odds need more exchange money.[1] Treat that percentage as a search starting point, not a commandment. A lower conversion can still make sense if the alternative expires unused. A high conversion can still be impractical if the liability swallows the rest of your working balance.

Is there a good match rating?

There is no universal cut-off that fits every offer. A good result is one that meets the live terms, can be fully matched and leaves a sensible net result after costs.

For a qualifying bet, ask how many pounds the match costs and what verified reward it unlocks. For an SNR free bet, ask how many pounds it converts. Then check liability, event time and settlement rules. The percentage is a quick comparison, not permission to stop reading.

A strict threshold can also hide trade-offs. Waiting for one extra percentage point may save pennies but push you towards a thin market, an inconvenient event or odds outside the offer terms. Taking a slightly lower rating may be rational when the market is liquid and the complete offer remains worthwhile. This is arithmetic, not a beauty contest for the largest number on screen.

Liquidity can turn a good rating into a poor bet

An Oddsmatcher row reports prices available when its feed last saw them. Your hedge works only if enough exchange money is still offered when you place it. Outplayed tells users to check available liquidity at the lay odds,[3] and Smarkets says insufficient liquidity can leave a bet unmatched or partially matched.[6]

If you need a £60 lay stake but only £15 is available at the quoted price, the displayed rating does not describe your complete position. Some of the lay may fill at a worse price, or not fill at all. Check the accepted stake and average odds, cancel any unwanted unmatched remainder, and recalculate from what actually matched. Smarkets confirms that only the matched portion of a partial bet stands.[6]

What does a rating above 100% mean?

A rating above 100% usually signals an arbitrage price gap: the bookmaker back price is favourable enough relative to the exchange lay price to produce a small matched profit rather than a qualifying loss. Outplayed describes anything above 100% as an arbitrage opportunity.[3]

Do not rush because the row has turned red. Prices can be stale, markets can differ, liquidity can vanish and an obviously wrong price may be voided under the operator's rules. Outplayed warns that a rating of 110% or more is likely to be a palpable error.[3] Check the event, selection, market, settlement terms and live prices before either bet. Never build the hedge on the hope that a mistaken price will stand.

A better way to use the rating

1. Choose the correct mode. Use Normal for a cash qualifying bet and SNR only when the free-bet stake is not returned.
2. Filter for the live offer. Apply the bookmaker, exchange, minimum odds, sport, market and deadline required by the terms.
3. Open a promising row. Confirm both sites show the same event, selection and settlement market.
4. Read pounds, not only percent. Check qualifying loss or converted value, lay stake and liability using your actual commission.
5. Check exchange depth. There must be enough money at the quoted lay price for the full required stake.
6. Confirm acceptance. Record the actual bookmaker odds, matched lay stake, average lay odds and any unmatched remainder.

A rating is a filter, not a bill. The calculator tells you the bill. The exchange then tells you whether the planned hedge really exists.

COMPARE MATCHES WITH OUTPLAYED ↗

Common rating mistakes

• Reading an SNR percentage as though it were a normal qualifying rating.
• Calling 100% free when exchange commission still affects the result.
• Ignoring the pounds lost because the percentage looks impressive.
• Choosing the highest row without checking minimum odds and eligible markets.
• Assuming displayed liquidity guarantees the full lay will be accepted.
• Chasing a 100% plus row without checking for stale or mistaken prices.

Useful next guides

Use the free matched-betting calculator to check your own figures. The qualifying and free-bet conversion guide follows both stages of an offer, while the liquidity guide explains how to repair a partial match. If the reserved exchange cash is the confusing part, read the lay liability guide.