For years, the Furnished Holiday Let (FHL) regime was the golden goose of UK property investment—a rare carve-out that offered landlords the tax advantages of a trading business without the operational scale normally required to achieve them. But as the dust settles on the government's abolition of the regime, the policy debate has ended, and the compliance headache has begun. For UK accountants, the 2025/26 tax return is where the rubber finally hits the road.

Following the abolition of the special tax treatment, the ICAEW's Tax Faculty has issued critical guidance on how practitioners must handle former FHLs in the 2025/26 self-assessment cycle. The transition is far from a simple flick of a switch. From stranded capital allowance pools to the sudden sting of Section 24 interest restrictions, accountants are facing a labyrinth of transitional rules that require immediate, proactive client management.

The New Reality: Merging into the Standard Property Business

As of April 2025, the FHL category effectively ceased to exist for tax purposes. Properties that previously qualified are now absorbed into the taxpayer's general UK (or overseas) property business. While this simplifies the number of boxes to tick on the SA105 property pages, the mechanical transition of historical data is fraught with complexity.

"The abolition of the FHL regime isn't just a loss of reliefs; it's an administrative collision. Practitioners must carefully map the legacy attributes of FHLs—losses, capital allowance pools, and financing costs—into a standard property framework that was never designed to accommodate them seamlessly."

The most immediate shock for clients will be the treatment of finance costs. Under the FHL regime, landlords enjoyed a 100% deduction for mortgage interest against their rental income. In 2025/26, these properties fall under the Section 24 rules, restricting finance cost relief to a basic rate (20%) tax credit. For higher-rate taxpayers with significant leverage, this shift will dramatically inflate their taxable profits, pushing some into higher tax brackets or eroding their child benefit entitlements.

Comparing the Regimes: What Changes in 2025/26

The Capital Allowances Conundrum

One of the most technically demanding aspects of the 2025/26 return involves capital allowances. Historically, FHL landlords could claim capital allowances on furniture, white goods, and integral features. Under standard property rules, these items only qualify for Replacement of Domestic Items Relief (RDIR).

However, the transition rules dictate that existing capital allowance pools do not trigger a balancing charge simply because the FHL regime was abolished. Instead, accountants must manage a hybrid scenario:

• Existing Pools: Any unrelieved expenditure in the main or special rate pools as of 5 April 2025 continues to attract writing-down allowances in 2025/26 and beyond, offset against the general property business.
• No New Claims: From 6 April 2025, no new capital allowances can be claimed. Any new furniture or appliances purchased will fall strictly under RDIR.
• Disposals: If an asset from the existing pool is sold, the disposal proceeds must be deducted from the pool, potentially triggering a balancing charge if the pool goes negative.

Practitioners must ensure their tax software is correctly configured to carry forward these legacy FHL pools into the standard property pages without inadvertently claiming new allowances.

Navigating the CGT Minefield and BADR Transitions

The loss of Business Asset Disposal Relief (BADR) is arguably the most painful blow for FHL owners looking to exit the market. Previously, the sale of an FHL could qualify for the 10% CGT rate. Now, sales will generally be subject to the standard residential property rates of 18% or 24%.

However, the 2025/26 tax year sits squarely within a transitional window. Accountants must be hyper-vigilant regarding the specific anti-forestalling rules and transitional reliefs:

1. Cessation of Trade: If the FHL business ceased before 6 April 2025, the taxpayer typically has a three-year window (until April 2028) to sell the property and still claim BADR, provided the conditions were met at the date of cessation.
2. Contract Dates: For sales straddling the abolition date, HMRC's anti-forestalling rules mean that unconditional contracts exchanged before 6 March 2024 will generally still qualify for the old CGT reliefs, but contracts exchanged after this date but completed after April 2025 will be heavily scrutinized.

If a client is selling a former FHL during the 2025/26 tax year, establishing the exact timeline of cessation and contract exchange is the difference between a 10% and a 24% tax bill.

The Hidden Sting: Pensions and Loss Relief

Beyond the headline changes to interest and CGT, two operational shifts require careful handling in the 2025/26 return.

The Pension Squeeze

FHL profits previously counted as 'relevant UK earnings' for the purpose of calculating maximum tax-relieved pension contributions. For clients who relied heavily on their FHL income to fund their SIPPs, the 2025/26 tax year brings a hard stop. Accountants must review clients' pension contribution plans immediately; if they continue contributing based on historical FHL income levels, they risk severe tax charges for exceeding their annual allowance.

Unlocking Stranded Losses

In a rare piece of good news within the transition, the ring-fencing of FHL losses has been dismantled. Previously, a loss on an FHL could only be carried forward and offset against future profits from the same FHL business. In the 2025/26 return, any accumulated FHL losses brought forward from 2024/25 can now be offset against the profits of the taxpayer's broader UK property business. Practitioners should actively look to utilize these newly liberated losses to cushion the blow of the Section 24 interest restrictions.

Action Plan for the 2025/26 Cycle

The abolition of the FHL regime transforms what was once a routine compliance exercise into a complex advisory intervention. To navigate the 2025/26 tax returns smoothly, UK accountancy firms must adopt a proactive stance:

• Segment and Communicate: Identify all clients with FHLs on their 2024/25 returns. Send targeted communications explaining exactly how their tax profile—particularly regarding mortgage interest and pensions—will change in 2025/26.
• Audit Capital Allowance Pools: Review the 2024/25 closing balances for all FHL capital allowance pools. Ensure your tax software is updated to carry these forward correctly into the general property business without triggering erroneous balancing charges.
• Re-evaluate Exit Strategies: For clients considering selling their holiday lets, model the CGT implications immediately. Determine if they fall within the three-year BADR transitional window based on a pre-April 2025 cessation.
• Adjust Payments on Account: Because the Section 24 interest restriction will artificially inflate taxable profits for leveraged landlords in 2025/26, the payments on account due in January and July 2026 may need to be adjusted upwards to prevent nasty surprises in January 2027.

Conclusion: The Advisory Imperative

The 2025/26 tax year marks the definitive end of the Furnished Holiday Let era. But for UK accountants, the work is just beginning. Untangling the legacy of capital allowances, navigating the transitional CGT reliefs, and managing the harsh reality of Section 24 interest restrictions requires meticulous attention to detail.

This transition is a prime opportunity for practitioners to demonstrate their value. Those who simply process the 2025/26 return after the fact will leave their clients exposed to shock tax bills and missed planning opportunities. Those who model the changes now, communicate clearly, and leverage the transitional rules will cement their status not just as compliance officers, but as indispensable strategic advisors in an increasingly hostile property tax landscape.