The UK doubled its Remote Gaming Duty from 21% to 40% on 1 April 2026. The change was announced in the November 2025 Autumn Budget. Six weeks of market response are now visible, and the early picture is clearer than the consensus pre-deadline view suggested.

Two operators have withdrawn from the UK market. The two largest UK-facing operator groups have published projected duty cost increases in the nine-figure range. Industry analysis is consistent in its read, this is the first wave of a structural reset, not a collapse.

What changed

From accounting periods beginning on or after 1 April 2026, Remote Gaming Duty applies at 40% to profits from remote gaming. The previous rate was 21%. The increase is the largest single tax change for online gambling in UK history.

Two adjacent changes round out the package:

• A new Remote Betting Duty rate of 25% applies from 1 April 2027, replacing the existing 15% General Betting Duty rate. Bets on UK horseracing remain at 15%.
• Land based Bingo Duty was abolished from 1 April 2026.

HM Treasury's stated rationale is harm-based. Online casino products, particularly slots and instant-win games, are cited as carrying higher risk profiles than remote betting. The differentiated tax model is intended to reduce operator incentive to push players towards more harmful products.

The package is projected to raise more than £1 billion per year for the Exchequer, per the Treasury's own consultation response from November 2025.

The first withdrawals

Lottomatrix has withdrawn from the UK market. Affiliates have been informed of account closures, with outstanding commissions due to be paid.

Small Screen Casinos has also withdrawn from the UK market.

Both withdrawals were reported by iGaming Business in the weeks leading up to the 1 April implementation date. Both are mid-tier brands rather than industry headline names, which is consistent with what most industry analysts predicted: the operators with the least scale and the highest UK concentration would move first.

The operators that have not withdrawn are repositioning rather than retreating. The same industry coverage describes "a first wave of structural adjustment, not a collapse, but a clear repositioning."

The numbers from the major operators

Two FTSE-listed operators published explicit cost projections in November 2025 alongside the Budget announcement.

Evoke Plc (which holds William Hill, 888, and Mr Green) issued a regulatory news service announcement on 26 November 2025. The Board's stated assessment:

• The duty increase will result in additional annual costs of £125 million to £135 million
• Approximately £80 million of that impact lands in FY26
• The Board projects "substantial and far-reaching changes to the entire UK operating environment"
• The Board predicts growth in the unregulated and untaxed black market as a direct consequence
• The Board projects "several thousand UK jobs" lost across the betting and gaming industry as a direct result

For context, Evoke paid £329 million in UK taxes in 2024, equivalent to more than 60% of its UK profits. The £125-135M increase represents an additional 40% on their existing UK tax bill.

Playtech Plc (the largest London-listed gambling technology supplier) issued its own response. The company estimated the tax changes would impact its 2026 Group Adjusted EBITDA by up to "high-teens millions of euros" before mitigating actions. Playtech's exposure is structural: it supplies platform and content to operators whose UK profits are now thinner.

These are not analyst estimates. They are publicly disclosed projections from listed companies subject to securities-law accuracy obligations.

What is actually changing in operator behaviour

Direct operational data on bonus structures, affiliate share, and product mix is not yet publicly available. The 40% rate has been live for six weeks. Public Q1 2026 reporting from major operators is still pending.

What is visible is the shape of operator response from public industry analysis.

The pattern from analyst pieces, including Altenar's January 2026 read and Business Matters' 25 April 2026 follow-up, points to four areas where licensed operators are working:

Bonus and promotional spend. Welcome offers and ongoing promotional generosity are the most visible levers. Promotional rules that took effect on 19 January 2026 already capped wagering requirements at ten times the bonus and banned mixed-product offers. The 40% duty on top means promotional generosity is being reset rather than fine-tuned.

Affiliate commissions. Higher duty squeezes the share of revenue available to pay affiliates. Operators with affiliate-heavy acquisition mixes are renegotiating terms. Some affiliates are reporting tightened commission structures or capped tiers.

Product mix. The duty applies to remote gaming products: online casino, slots, live dealer, poker. Sports betting moves to 25% in April 2027 and remains at 15% for now. UK horseracing bets stay at 15% under the levy-linked structure, and bingo became duty-free in April 2026. Operators with diversified product portfolios can shift mix towards the lower-duty categories. Casino-pure operators cannot.

Return To Player percentages are quietly being reset. Casino content suppliers we work with have reported being asked to provide reduced RTP percentage game titles to UK facing customers. Time will tell if the inevitable reductions in wagering turnover and player session lengths will negatively impact the bottom line of these operators. It will certainly detract from the player experience.

Market exit by smaller and UK-concentrated brands. Lottomatrix and Small Screen Casinos are the visible cases. The structural logic predicts more in the same category over the next two to three quarters: brands without scale to absorb the new cost base and without geographic diversification to lean on.

The operators least exposed are the largest groups with international diversification. Playtech, in its own statement, attributed its confidence in meeting 2026 expectations to "geographic diversity across regulated markets and strong performance and prospects outside of the UK." That language is the playbook for the operators that will survive the reset intact.

The black market question

Evoke's RNS announcement explicitly warned that the duty change would drive growth in the unregulated and untaxed UK black market. This is the political fault-line in the policy.

The Treasury's own modelling assumed some leakage to the black market but projected a net revenue gain of £1 billion per year. Industry analysis has been more sceptical, citing the gap between projected and realised tax revenue under previous duty changes.

The black market argument cuts in two directions for compliance practitioners:

For licensed operators, the argument is that aggressive duty rates make the licensed market less competitive against unlicensed offshore operators serving UK players. The UK Gambling Commission's enforcement against offshore operators (now reinforced by the November 2025 multi-regulator joint statement on illegal gambling) is the counter-pressure intended to close that gap.

For grey-market operators, the argument is the opposite: the wider the licensed-vs-unlicensed price difference, the more player demand the unlicensed market can serve. That demand is now the target of the joint statement enforcement programme. The Dutch KSA's EUR 24.8 million Novatech fine in March 2026 is the early example of what coordinated enforcement looks like in practice.

The next twelve months will tell which direction wins. Either the duty rises and pushes traffic offshore faster than enforcement can catch it, or coordinated enforcement reduces the offshore alternative faster than the duty pushes players toward it.

What licensed operators should do now

Six practical priorities for any operator currently licensed in the UK or with material UK player exposure.

Reforecast Q2 to Q4 2026 with the new duty rate baked in. Most operators have done this. The ones that have not are running 2026 plans that no longer reflect reality. The mid-year cash flow effect is the most disruptive part if it has not been built into the model.

Audit promotional spend with the new economics. Welcome offers, reload bonuses, free spins, and VIP programmes all need to be re-evaluated against post-duty revenue per player. Programmes that were marginally profitable at 21% may be loss-making at 40%.

Renegotiate affiliate commissions early. Affiliates that pushed back on commission tightening pre-April are now in a different negotiating position. Operators that have not had this conversation should have it now, with concrete proposed terms rather than open-ended discussion.

Audit product mix for cross-vertical opportunity. Sports betting at 15% (until April 2027) and UK horseracing bets at 15% (ongoing) are now meaningfully lower-duty than online casino. Operators with B2C licences covering both have a temporary structural advantage in shifting marketing emphasis.

Document the operational changes. Whatever you change in promotional structure, affiliate commission, or product mix, document it. The Gambling Commission's published 2025 guidance signalled increased scrutiny of operator decision-making around vulnerable players. Sudden changes to promotional generosity that look like a response to duty rather than a response to player welfare are exactly the kind of pattern the Commission audits.

Track competitor exits. Lottomatrix and Small Screen Casinos are the early movers. The next withdrawals will create acquisition opportunities for operators with the balance sheet to absorb new players. The cost of acquiring players from a withdrawing competitor is materially lower than acquiring them via paid media.

What grey-market operators should be thinking about

The 40% UK duty does, mechanically, increase the relative attractiveness of unlicensed offshore operations targeting UK players. That is the trade-off the Treasury accepted.

What the duty change does not do is reduce the enforcement pressure on grey-market operators. The opposite. Higher licensed-market costs intensify Gambling Commission enforcement against unlicensed competitors targeting UK players, because every offshore operator serving UK players is now serving a player base that licensed operators are paying 40% duty to retain.

The November 2025 joint statement on illegal gambling, signed by the UK alongside six EU regulators, formalises information-sharing for exactly this kind of cross-border enforcement. The UK Gambling Commission has explicitly stated it will independently verify blocking measures against unlicensed brands serving UK players. The duty change creates more pressure for enforcement, not less.

For operators currently grey-market in the UK, the implication is simple: the window in which the Treasury's new revenue model depends on licensed-market compliance is also the window in which the Gambling Commission has the political support and the cross-border infrastructure to drive enforcement harder. Operating grey in the UK in 2026 is a different risk calculation than it was in 2024.

What ICOS does on this

For operators on our retainer with UK player exposure, the duty change is a standing item in the quarterly compliance review. Specifically: licence verification, product-mix tax modelling, promotional compliance audit, and Gambling Commission correspondence tracking.

ICOS works exclusively with operators pursuing or holding regulatory licences. We do not advise on unlicensed operations or evasion of regulatory frameworks except to say that the cross-border enforcement environment is now too credible for that option to be feasible for too much longer.

If you want to talk about your specific UK exposure or your wider compliance framework, tell us your situation. Recommended jurisdiction, fixed price, realistic timeline. Within 24 hours.

The 40% duty is the new floor, not a temporary measure. The operators that adjust their economics to the floor will be the ones still licensed in the UK in 2028. The ones that do not will be following Lottomatrix.