The UK Financial Conduct Authority (FCA) expects its new cryptoasset regime to generate a net benefit of just GBP 120 million. FM Intelligence said today (Tuesday) its analysis found GBP 1.435 billion in modeled benefits against GBP 1.315 billion in costs over a 10-year appraisal period.That margin equals 9.1% of the total cost base. These figures are not invoices that crypto firms will pay. They are FCA estimates expressed as present values in 2026 prices, discounted at 3.5%, for a regime due to start on October 25, 2027.For the 325 firms the FCA expects to fall under the new rules, how that GBP 120 million figure was built matters more than the total itself.A full breakdown of the FCA's cost-benefit case published by FM Intelligence shows that more than half of the benefit side rests on a single assumption about what consumers value in stronger protection.A Single Assumption Decides the MathThe largest benefit in the FCA's model is not an observed drop in fraud or losses. It is GBP 735 million assigned to the value consumers place on stronger regulatory protections, or 51.2% of all modeled benefits.Strip that assumption out as a sensitivity test and the remaining GBP 700 million of benefits falls GBP 615 million short of the GBP 1.315 billion cost estimate.The FCA frames the same number as a breakeven test. Across an estimated 4.5 million current crypto consumers, the regime needs to generate GBP 136 of protection value per person over 10 years, or GBP 13.60 a year, to cover its own cost base.FCA Executive Director of Payments and Digital Finance David Geale said the rules would hold firms to standards similar to other financial providers. "... though we can't regulate away risk," he said in a statement announcing the final rules.[#highlighted-links#]Most Firms Are Small, but the Average Would MisleadThe FCA models a future regulated population of 325 firms: 240 small, 77 medium and eight large. Small firms make up 73.8% of that estimated population.Dividing GBP 1.315 billion by 325 and calling the result an average compliance bill would be misleading. The total spans costs that vary by activity, scale and timing, and some activity counts overlap.The population itself is a projection of the future market rather than a list of applicants.The FCA has acknowledged the rules may raise barriers to entry, a concern that has already played out under the European Union's parallel framework.Compliance costs tied to the Markets in Crypto-Assets Regulation (MiCA) have already pushed roughly 80% of previously active crypto-asset service providers out of the European Union market, FinanceMagnates.com reported in May.A UK population that is nearly three-quarters small firms will test whether pre-application support can avoid the same consolidation.Costs Concentrate in Custody and Market InfrastructureAmong activity-specific estimates, intermediaries carry the largest present-value cost at GBP 355 million, followed by custodians at GBP 315 million.Market abuse rules add GBP 190 million across the regime, while trading platforms account for GBP 84 million and lending, borrowing and staking each contribute GBP 85 million.Those categories are not additive. A single firm can conduct more than one regulated activity, and cross-cutting rules can apply on top of activity-specific ones, so the breakdown describes modeled rule and activity costs rather than a bill per license holder.The Gateway Adds a Near-Term Execution RiskApplications open on September 30 and close on February 28, 2027. Existing anti-money laundering registrations do not convert automatically into permissions under the Financial Services and Markets Act.So currently registered firms must apply for a variation of permission, FinanceMagnates.com reported in January, before the regime takes full effect on October 25, 2027.The FCA's historical anti-money laundering register offers context, not a forecast. Since January 2020, the regulator received 412 applications and determined 391 of them.Of those, 263 were withdrawn before reaching a decision, FM Intelligence found in a separate review. The rest split 68 registrations, 46 rejections and 14 refusals.That older test was narrower than the incoming standard, so its 17.4% registration share should not be projected onto the new gateway.Michael McCormick, a financial services managing consultant at RSM UK, said the calculus for crypto firms has already shifted. "... the authorisation race has effectively started," he told Retail Banker International.The FCA has flagged a handful of concrete markers for the months ahead: the mix of first-time applicants versus existing firms seeking a variation of permission, and whether complaint and loss data start to move after implementation.A third marker sits in the population itself, whether the small-firm share of the 325-firm total still holds near 73.8% once the application window closes.This article was written by Damian Chmiel at www.financemagnates.com.