What is a turnover tax in gambling?

A turnover tax, or stake tax, is a gambling tax calculated as a percentage of the total amount wagered rather than the operator's gross gaming revenue. The operator pays it on every bet or spin, regardless of whether the player wins or loses. Because operators keep only a small share of stakes on many products, a turnover tax that looks low as a percentage can take a large share, or even all, of the operator's revenue.

What is Germany's gambling tax rate?

Under Germany's Racing Betting and Lottery Act, online sports betting, virtual slot machine games and online poker are each taxed at 5.3% of stakes. The tax base is the stake minus the tax itself, so the effective rate on gross stakes is about 5.03%. The operator is liable for the tax, which arises when the stake is paid. Check the current consolidated text of the law before relying on the rate, as tax rules can change.

Why do stake taxes lead to lower RTP?

A stake tax takes a fixed share of every amount wagered. If a slot returns 96% of stakes to players, the operator keeps only 4%, and a 5% stake tax would cost more than that. To stay profitable, operators reduce the return to player so they keep a larger share of each stake. The same logic applies to sports betting, where it leads to wider margins in the odds.

Is a turnover tax better or worse than a GGR tax?

Each has trade-offs. A turnover tax is easy to collect and produces stable revenue because it does not depend on results, but it raises costs on low-margin products and can push players to unlicensed sites offering better payouts. A GGR tax tracks what operators actually earn and is neutral between products with different margins, but government revenue fluctuates with results. Most mature online markets use GGR as the base.

Regulatory

Turnover Tax (Stake Tax)

Turnover Tax

Definition

A turnover tax, also called a stake tax, is a gambling tax charged as a percentage of the total amount players stake, rather than on what the operator keeps after paying out winnings. Because it is levied on every bet or spin whatever the outcome, its real burden depends on the product's margin: on a casino game that returns 96% to players, a 5% stake tax takes more than the operator's entire gross gaming revenue.

Germany is the best-known European example. Under its Racing Betting and Lottery Act (Rennwett- und Lotteriegesetz), online sports betting, virtual slot machines and online poker are each taxed at 5.3% of stakes. Turnover taxes are simple to administer and yield stable revenue, but they push operators to cut return to player and odds, and are often blamed for weakening channelisation to the licensed market.

Key takeaways

A turnover tax is charged on the amount staked, not on the operator's gross gaming revenue.
It is owed on every bet whatever the result, so its burden as a share of GGR rises as the product's margin falls.
Germany taxes online sports betting, virtual slots and online poker at 5.3% of stakes, measured on stakes net of the tax.
Operators usually respond by lowering RTP or odds, which can make the licensed product less competitive than unlicensed sites.

Formula

Tax = Stakes x r. Where the base is stakes net of the tax (Germany): Tax = Stakes x r / (1 + r). Burden on GGR = Tax / (Stakes x hold)

Germany's law measures each tax on stakes minus the tax itself, so the 5.3% headline rate equals about 5.03% of gross stakes. Dividing by GGR shows the real burden.

Worked example

The figures below are round and illustrative, using the German tax-exclusive method.

Sportsbook: 50,000,000 in stakes at a 10% hold gives GGR of 5,000,000. Tax = 50,000,000 x 0.053 / 1.053 = 2,516,619, or 50.3% of GGR.

Online slots: the same 50,000,000 in stakes at a 4% hold (96% RTP) gives GGR of 2,000,000. The tax is again 2,516,619, or 125.8% of GGR.

The tax bill is identical because the stakes are identical, but on the slot product it exceeds everything the operator wins. Lowering RTP to, say, 90% raises the hold to 10% and brings the burden back to about half of GGR.

Why it matters

Turnover taxes change product design, not just profit. Because the tax is fixed per unit staked, the only way an operator can restore margin is to keep more of each stake, which means lower RTP on casino games and wider margins on betting odds. Game studios therefore build market-specific maths models with lower payout percentages, and aggregators and platforms have to manage several versions of the same title.

The commercial knock-on is competitive. Unlicensed sites that pay no tax can offer higher payouts, so stake taxes are frequently cited in debates about channelisation and the black market, including in Germany, where the GGL regulates the online market. For suppliers on revenue-share deals, a stake tax reduces the operator's net revenue far more on low-margin verticals, which affects which products are worth launching at all.

When assessing a market, convert the stake tax into an effective rate on GGR for each vertical and expected hold. The European gambling regulation course covers how tax design interacts with licensing across the region.