Gambling tax is quoted as a percentage, and the percentage is almost never the interesting part. What matters is what the percentage is applied to, because two markets can tax at a similar headline rate and produce completely different businesses.
There are three bases in common use, and the difference between them explains more about product design, odds pricing and market exits than any other single factor in this industry.
Gross gaming revenue
Gross gaming revenue, usually shortened to GGR, is stakes minus winnings paid. It is what the operator actually retains from play before any costs. Most licensed markets tax on this base, including Britain, Denmark, Sweden, Spain, Italy and Ontario.
A GGR tax is proportionate by construction. If an operator has a bad month and pays out more than it takes, it owes little or nothing; if it has a good one, it pays more. The risk of the product sits with the operator, not with the tax authority, and that symmetry is why the base has become the norm.
The arguments in GGR markets are therefore about the rate and about what may be deducted before the calculation: whether bonuses count as winnings paid, whether free bets are deductible, and how jackpot contributions are treated. Those details move the effective rate by several points.
Turnover
A turnover tax is levied on the amount staked, whatever happens next. Germany taxes stakes on virtual slot games and online poker; Poland taxes online betting turnover; Portugal taxes sports betting on stakes while taxing casino games on revenue; Kenya has applied excise duty on stakes.
On a high-margin product the difference is uncomfortable. On a low-margin one it is structural. Consider sports betting at a 5 per cent margin: every 100 units staked produces 5 units of revenue. A 20 per cent GGR tax costs 1 unit. A 5 per cent turnover tax costs 5 units, which is the entire margin.
| Product | Typical margin on stakes | 20% of GGR costs | 5% of turnover costs |
|---|---|---|---|
| Sports betting | about 5% | 1.0 per 100 staked | 5.0 per 100 staked |
| Online slots | about 4% | 0.8 per 100 staked | 5.0 per 100 staked |
| Live blackjack | about 1% | 0.2 per 100 staked | 5.0 per 100 staked |
The table explains several things at once: why German licensees do not offer live table games even where they could, why low-margin products disappear from turnover-taxed markets, and why operators in those markets price odds worse than the same brands do elsewhere. The customer sees a worse product and rarely knows why.
Licence fees, levies and shares
Tax is not the only payment. Several markets add fixed or variable charges that function as tax but are not called it.
- Fixed licence or concession fees. Italy charges substantially for a concession; Greece sets a fee per licence type; Brazil requires a large authorisation payment up front.
- Revenue share to a state body. Ontario registrants pay a share of gross gaming revenue to the provincial entity rather than a tax in the usual sense. Colombia charges exploitation rights on the same logic.
- Statutory levies. Britain funds research, prevention and treatment through a levy on licensees. Several markets require contributions to responsible gambling or sports funds.
- Allocations. Brazil directs defined shares of the tax take to sport, tourism and public funds, which is politically significant when rates are debated.
A realistic comparison of two markets has to add these together. A market with a modest GGR rate and a large fixed fee can be more expensive for a mid-sized operator than a market with a higher rate and no entry cost, because the fixed element does not scale down.
Who ultimately pays
Formally the operator pays. In practice the cost is distributed, and where it lands depends on how competitive the market is.
In a highly competitive licensed market, a tax rise is partly absorbed in margin and partly passed to customers through worse odds, smaller bonuses and fewer promotions. In a market where the licensed sector competes against an unlicensed one, a tax rise does something else: it widens the gap between what a licensed operator can offer and what an unlicensed one can, which pushes play towards the untaxed side. That dynamic is the central argument in every debate about channelling.
It is also why regulators and finance ministries frequently disagree. The regulator is measured on how much play it keeps inside the licensed system; the ministry is measured on receipts. A rate that maximises one does not maximise the other.
Reading a market's tax position
- Establish the base first: stakes or revenue. Everything else follows from this.
- Find out what is deductible: bonuses, free bets, jackpot contributions, and whether losses carry forward.
- Add the fixed costs: licence or concession fees, annual charges, mandatory levies and contributions.
- Check whether the rate differs by product. Pennsylvania taxes online slots far more heavily than online table games; Portugal uses different bases for betting and casino.
- Check how often it has changed. A market that has moved its rate three times in five years is a different risk from one that has not moved in a decade.
The market profiles on this site record the base rather than a headline rate, because the base is stable and the rate is not. The profiles are listed here.