The Masters 2019 Offer – 21Bet

The Masters 2019 gets underway on Thursday and you don’t want to miss this 21Bet ‘Bet £50, Get £10’ offer! Simply bet £50.00+ on selected markets and 21Bet will give us a £10.00 free bet to use on the same tournament. Translated into matched betting terms, this gives us a guaranteed profit of £16.14 and here’s how…

Key Terms:

  • Our first qualifying bet of £50.00+ on the Outright market must be placed before 12:15 (tee-off) on Thursday 11th April 2019.
  • We can then qualify for two further free bets by betting £50.00+ on the 3-Ball markets for both Thursday and Friday.
  • All offers can only be claimed once, so a maximum total of £30.00 in free bets.

Qualifying Bets:

If you’re unfamiliar with qualifying bets, please see my Qualifying Bet Strategy page for a walk-through guide on how it should be done.

It’s entirely up to you who you place your first qualifying bet on. Having looked at the odds available, we could place our qualifying bet on Rory McIlroy.

At the time of writing, laying our bet at Betfair gives us the smallest qualifying loss.

We can calculate our lay stake using my matched betting calculator…

Back Bet (Bookie)


Lay Bet (Betting Exchange)


Min £
Max £
Lay stake required: £
If back (bookie) bet wins
= £
If lay (exchange) bet wins
= £
Total profit: £

Optimal Underlay

Lay stake required: £
Exchange liability: £

If back (bookie) bet wins: £
If lay (exchange) bet wins: £

Optimal Overlay

Lay stake required: £
Exchange liability: £

If back (bookie) bet wins: £
If lay (exchange) bet wins: £

As you can see, the calculator tells us that our lay stake should be £48.57…

21Bet logo

Place £50.00 on Rory McIlroy @ 8.50 = Potential profit of £375.00

Betfair logo

Lay £48.57 on Rory McIlroy @ 8.80 = Potential liability of £378.84


Let’s have a look at our potential profit/loss for the possible outcomes…

Outcome Bookie Exchange Profit/Loss
Rory McIlroy wins +£375.00 -£378.84 £3.84 loss
Rory McIlroy doesn’t win -£50.00 +£46.14 £3.86 loss

So, regardless of the outcome, we’ll lose a maximum of £3.86 in qualifying for our first £10.00 free bet.

Free Bets:

Our first £10.00 free bet will be credited by 11:00 on Friday 12th April 2019. All free bets will be valid on any US Masters 2019 market and free bet stakes will not be included in any returns.

We should be able to limit our qualifying losses on Thursday’s and Friday’s 3-Ball markets to around £2.00 on each. Our 2nd and 3rd free bets will be credited by 11:00 on Friday 12th April 2019 and 11:00 on Saturday 13th April 2019 respectively.

By using straightforward matched betting, we should be able to extract 80% cash from our 3 x £10.00 free bets, so £24.00. If we take into account our maximum overall qualifying loss of £7.86, this gives us a guaranteed profit of £16.14 on this 21Bet offer!

* Rory McIlroy failed to win the tournament, resulting in a profit of £16.14 on this 21Bet offer. *

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Matt Kirman - Matched Betting Blogger

Matt KirmanMatched Betting Blogger

Since 2014, I’ve blogged over £70,000 worth of profit, and made it my mission to make matched betting accessible to everyone.