Home › 300% deposit bonus

What a 300% deposit match is really worth, in plain arithmetic

Tripling a deposit is generous, and it is easy to get the most from it once you know how the play-through works. Here is the arithmetic.

Updated 31 October 2026 · by the site team

A 300 percent deposit bonus is among the largest welcome offers you will see. Your deposit is matched three times over, so you play with four times what you paid in. That makes it worth understanding properly, so you can enjoy every euro of it. We have taken it ourselves, at CasinoWinner, and kept notes. This page is the maths, written for UK players who like to know exactly what they are getting.

Claim 300% at CasinoWinner — code WIN300

How does a 300% deposit match work?

You make a first deposit, enter the bonus code, and the casino credits three times that deposit as bonus money. Your own money stays your own. The bonus credit is spendable straight away, but it is not withdrawable until you have staked a set multiple of it, which is the "wagering" or "play-through". Only after that does what remains convert to cash.

The last column is there for a reason. On a €50 deposit, a 300% offer gives you €100 more to play with than a 100% offer. The bonus part is played through before it becomes cash, and with a balance twice as large you have the spins to do it.

How much do I need to stake to clear it?

Multiply the bonus by the wagering multiple shown on CasinoWinner's promotions page, which you should read on the day you deposit. Then divide by your stake per spin to see how many spins that is. A smaller stake gives you more spins from the same balance, which is how regulars turn a 300% match into a full evening. Do this once before you type the code and you will know exactly where you stand.

Does every game count the same?

Slots normally count in full, so they move the play-through fastest, and CasinoWinner's lobby is mostly slots. Live tables and blackjack carry a lighter weighting, so the usual routine is to clear the match on the reels and enjoy the dealers from your cash balance. That makes a 300% match a natural fit for anyone who loves slots. Our page on wagering requirements explained covers weighting in more depth.

When is a 300% bonus a good idea?

• When you were going to play a long slot session anyway, and the extra balance simply makes it longer.
• When you choose a modest stake per spin, so the balance survives long enough to work through the requirement.
• When you have noted the stake size the promotions page sets while the bonus runs, so every spin counts.

When might cash-only play suit you better?

• When you plan a short session and want your balance free to withdraw at once.
• When tonight is all about the live dealer tables.
• Either way, pick your deposit amount first, then decide on the code.

Both are fine: leave the promo box empty and your deposit is plain cash.

Is a bigger percentage always better?

The best percentage is the one that matches how you like to play. A 100% match suits a quick session; a 400% one suits a marathon. For a slot player with an evening free, 300% is a sweet spot: four times your deposit to play with, from the very first spin.

How do I take the 300% offer at CasinoWinner?

Register, and type WIN300 in the promo field of the form or in the cashier with your first deposit. Revolut and cards need at least €30, crypto works from the €25 cashier minimum. Set a deposit limit first. Details of each method are on CasinoWinner payments, the full picture of the casino is in our CasinoWinner review, and slot suggestions for a bonus balance are on CasinoWinner games.

18+. A bonus is extra play, not extra money until the terms are met. Set limits and play for fun.