Betting Exchanges in Ireland and the Lay Bet Calculator

A lay bet calculator answers two questions: how much you stand to lose if your lay selection wins, and how much to lay to lock in a result after backing. On an exchange you take the bookmaker's side, so your risk is the liability, not the stake. Below are the exchanges licensed for Irish punters and the sums behind laying.

Licensed betting exchanges in Ireland

No.	Runner	Form	Licence	Verdict	Links
1	BetfairPPB Counterparty Services Limited	1-1-4-4-4	GRAI licence (betting)	NAP	Visit
2	SmarketsSmarkets Malta Limited	1-3-5-5-4	GRAI licence (betting)	Each-way	Visit
3	MatchbookTriplebet Limited	1-3-5-5-5	GRAI licence (betting)	Each-way	Visit

Form reads licence, markets, payments, safer-play tools, terms; 1 is best. How we rate. 18+ only.

An exchange needs a GRAI remote betting intermediary licence, a different category from a bookmaker's remote betting licence. As of 29 October 2026 three exchange operators we rate hold one.

• Betfair Exchange. Betfair International plc, intermediary licence from 11 August 2026. The sportsbook sits under a separate betting licence shared with Paddy Power.
• Smarkets. Smarkets Malta Limited, intermediary licence from 12 August 2026, trading as Smarkets and SBK. It holds no separate betting licence on the register.
• Matchbook. Triplebet Limited holds both intermediary and betting licences from 1 October 2026, also trading as easybet.

What happened to Betdaq

Betdaq, founded in 2000 by Dermot Desmond, was the Irish-born rival to Betfair. Matchbook completed its acquisition in October 2026. The Betdaq exchange stayed open for trading until 21 October, and accounts remain open for withdrawals only until 4 November 2026, with liquidity merged into Matchbook. Anyone still holding a Betdaq balance should withdraw it before that date. Betdaq promo codes, welcome bonuses and free bets searched for today no longer lead anywhere useful.

How a betting exchange works

A bookmaker sets prices and takes every bet. An exchange only matches punters with opposite opinions: one backs a horse to win, another lays it, and the exchange keeps a commission on the winner's net profit. Prices are quoted in decimal odds, so 5.0 on an exchange is 4/1 in a shop. Our odds guide converts between the two.

Three consequences follow. Prices on popular markets are often better than the books', because no bookmaker margin is built in. An exchange has less reason to restrict a winning account, since it does not carry the risk of the bet. And thin markets, such as a lower-grade Irish race in the morning, may have little money waiting to be matched.

The lay bet calculator, worked through

Laying means accepting someone else's back bet. If you lay at decimal odds L with a backer's stake S, your liability is S multiplied by (L minus 1).

Lay odds	Backer's stake you accept	Your liability if it wins	Your gain if it loses (before commission)
2.0	EUR 10	EUR 10	EUR 10
5.0	EUR 10	EUR 40	EUR 10
11.0	EUR 10	EUR 100	EUR 10

The last row is the trap. Laying a 10/1 shot for a tenner risks a hundred. Exchanges show the liability on the bet slip; read it before you confirm.

Back and lay: matching a bet

The back lay betting calculator works out how much to lay so the result is the same whatever happens. The formula, before commission: lay stake = back stake x back odds / lay odds.

A worked example. You back a horse for EUR 10 at 6.0 (5/1) with a bookmaker. Its price shortens and you can lay it at 4.0 on an exchange. Lay stake = 10 x 6.0 / 4.0 = EUR 15. Your liability is 15 x 3 = EUR 45.

• If the horse wins: back bet profit EUR 50, lay liability minus EUR 45. Net plus EUR 5.
• If the horse loses: back stake lost, minus EUR 10; lay bet won, plus EUR 15. Net plus EUR 5.

Commission then comes off the winning lay. On an assumed 5% rate, purely for the arithmetic, the losing-horse outcome becomes plus EUR 4.25. Each exchange publishes its own rate; check it before the sums.

Commission and the 25% duty

Exchanges pay Revenue a betting intermediary duty of 25% of the commission they charge customers in Ireland. That is a tax on the operator, not the punter, but it bears on the commission rates exchanges set for Irish accounts. Punters themselves pay no tax on exchange winnings; see the tax guide.

Exchange offers and promo codes

Exchange welcome offers tend to be commission refunds or small free bets rather than big bonuses. Where the desk has confirmed a current euro offer it appears on the card above; an empty slot means unconfirmed rather than nonexistent, and the operator's own promotions page is the place to check. Matched betting, using free bets and lay bets together, relies on exactly the back-and-lay sums above; it is not a route to certain profit once commission, odds movements and account restrictions are counted.

Which exchange suits an Irish punter

Betfair leads on its form line and is the exchange most Irish racing punters already know; its app also carries the sportsbook. Smarkets is an exchange only here, with no separate bookmaker licence on the register. Matchbook, now carrying Betdaq's former customers, is the one to watch over the winter. All three are 18+ only, and the leverage of laying makes deposit limits more useful than usual; our responsible gambling page covers how to set them.

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