Rent Arrears: The Landlord's Tax and Possession Handbook (Post-RRA 2025)

If your tenant is now three months behind on rent, here is what the post-Renters' Rights Act 2025 timetable looks like and what it means for this year's tax return. This page is the working landlord's handbook for the arrears situation as it lands in 2026: the new statutory floor for the mandatory possession ground (13 weeks of arrears plus a 3-week Section 8 notice period), the cash-basis-versus-accruals decision that controls whether unpaid rent ever appears on your return, the bad-debt write-off mechanic, the s.24 squeeze multiplier, the operational tools (Universal Credit Alternative Payment Arrangements and breathing-space awareness), and the records discipline that backs the write-off on enquiry.

Most rent-arrears pages skew either to generic "what to do if your tenant doesn't pay" listicles built for landlord-marketing platforms or to policy pieces tracking the macro trend in arrears. This is neither: it is the operational glue. Which line on the SA105 carries the bad-debt write-off, when it can be claimed, what evidence has to be on file, and how a 13-week-arrears possession run interacts with the tax-year cut.

The Post-RRA-2025 Possession Timetable: 13 Weeks Plus 3 Weeks

Renters' Rights Act 2025 Sch 1 para 24, in force from 1 May 2026 per SI 2026/421 reg 2, made two operative changes to Housing Act 1988 Sch 2 Ground 8 (the mandatory possession ground for rent arrears):

• The arrears threshold rose from 8 weeks to 13 weeks. The tenant must be 13 weeks in arrears at both the notice date and the court hearing for Ground 8 to be made out.
• The Section 8 notice period extended from 2 weeks to 3 weeks. Once the threshold is reached, the landlord serves the prescribed Form 3 notice and the 3-week clock starts to run before a court application can be issued.
• A new Universal Credit housing-element carve-out. Arrears attributable to delayed UC housing-element payments are disregarded when calculating the 13 weeks. A landlord cannot use a UC-delay-arrears situation to satisfy Ground 8.

For a monthly-tenancy let at £1,500 a month, the practical timeline runs as follows. Tenant pays March 2026 rent then stops. On 30 April the tenant is 2 months in arrears (£3,000): under the old 8-week Ground 8 threshold, notice would now be available, but under the new 13-week threshold notice is still not available. On 30 May the tenant is 3 months in arrears (£4,500) and the 13-week threshold is reached. The landlord serves the Section 8 notice with its 3-week notice period (notice expires around 21 June). The landlord applies to court on 22 June; court listing is typically 6 to 10 weeks from application; possession order issues August or September 2026 with a 14-day enforcement-vacate window; bailiff appointment a further 4 to 8 weeks. Total elapsed time from first missed payment to vacant possession: approximately 7 to 9 months. Total arrears at handover: £10,500 to £13,500.

The Discretionary Fallback: Grounds 10 and 11

Where Ground 8 cannot be made out at the hearing (the classic case: tenant pays just enough to drop below 13 weeks the day before court), the discretionary arrears grounds remain in play. Ground 10 covers some rent arrears unpaid at both notice and hearing; Ground 11 covers persistent delay in paying rent. Both are discretionary, which means the court can refuse possession even if the ground is proved.

The operational reality: tenants cycling through 8 to 12 weeks of arrears and then partially paying down before each hearing exploit the discretionary nature, and possession is rarely obtained on the first application under Grounds 10 or 11 alone. The RRA 2025 retained these grounds in modified form, and they remain the realistic fallback. Where reliance on Grounds 10 or 11 is anticipated, the landlord's contemporaneous record of the persistent-delay pattern (a rent ledger showing recurrent late or partial payment over the tenancy) is the load-bearing evidence.

Cash Basis or Accruals: Whether the Arrears Ever Land on the Return

ITTOIA 2005 s.271A makes the cash basis the default for individual landlords with property-business gross income under £150,000. The default is binary in effect: under the cash basis, arrears are not income until actually received. The landlord books only what hits the bank account; an unpaid tenant produces zero recognised rent (and therefore zero tax) until payment. No bad-debt write-off is needed under the cash basis because the rent never entered the books. Conversely, no relief is available if the rent is received later: the receipt is income in the year of receipt.

Above the £150,000 threshold, or where an individual landlord has elected out of the cash basis under s.271A(3), or in a company-shareholder context, the accruals basis applies. Under accruals, the gross rent receivable for the year is booked into the rental computation regardless of whether the tenant has paid. The bad-debt write-off mechanic at ITTOIA 2005 s.35 then becomes the route to back the unpaid rent out of taxable profit.

This split is the single highest-value clarifier on a rent-arrears page and is the point most generic landlord-marketing content gets wrong. A cash-basis landlord with a tenant in arrears does not write off the arrears; there is nothing to write off. An accruals-basis landlord with the same arrears must work through s.35 with full evidence on file.

The s.35 Bad-Debt Write-Off for Accruals-Basis Landlords

ITTOIA 2005 s.35 (bad and doubtful debts), read through s.270's trade-equivalent rule that imports trading-style deductions into the property-business computation, allows a deduction for rent debts shown to be irrecoverable. HMRC's working test sits at BIM42700+ and is inherited into the property-income computation through PIM2068.

"Irrecoverable" is HMRC's evidence-led test. The landlord must show:

• Reasonable steps taken to recover. Demand letters, formal Section 8 notice where appropriate, court proceedings where the arrears justify it, instructed bailiffs to enforce any judgment.
• Objective bad-debt evidence. Typical: an untraceable tenant departure (tracing-agent confirmation), a county court judgment unsatisfied 6 months or more, a return of warrant from instructed bailiffs, a tenant bankruptcy or IVA.
• Specific provision for doubtful debts qualifies. A specific provision for a particular unlikely-to-pay-but-not-yet-objectively-bad debt is deductible for the specific amount. General provisions ("5 percent of debtors written off as standard practice") are not deductible.

The deduction goes on SA105 box 28 (other allowable property expenses) with a working schedule retained for HMRC enquiry. Box 5 (rent received) continues to carry the gross rent receivable on the accruals basis; the box 28 entry is the deduction that takes the bad debt back out.

Worked example. A portfolio landlord on accruals holds a single property with £20,000 contractual rent for the year. The tenant pays £6,000 then disappears in month 4. A county court judgment for the £14,000 balance is obtained and remains unsatisfied 12 months later; the bailiff returns the warrant unsatisfied; the tenant is untraceable on a tracing-agent search. The accruals computation at year-end:

• Rent receivable (box 5): £20,000.
• Cash received during the year: £6,000.
• Debtor balance at year-end: £14,000.
• s.35 bad-debt write-off (box 28): £14,000, justified by CCJ-unsatisfied-6-months plus bailiff-warrant-returned plus tracing-agent-confirmation evidence pack.
• Other allowable expenses (box 28 line items): £3,000.
• Taxable rental profit: £20,000 minus £14,000 minus £3,000 = £3,000.

The s.24 Squeeze Multiplier: Why Arrears Hurt Worst on Mortgaged BTLs

ITTOIA 2005 ss.272A-272B convert mortgage interest from a deduction against rental profit into a 20 percent basic-rate tax reducer applied against the tax bill. The architectural change matters because the reducer is capped at the tax otherwise due on the property-business profit, which means it cannot create a tax refund. When arrears collide with a mortgaged BTL, the cap bites at exactly the moment the landlord can least afford it.

Worked illustration. A higher-rate (40 percent) landlord with a single BTL. Annual rent at full occupancy £20,000; annual mortgage interest £15,000; other allowable expenses £3,000; cash-basis taxpayer (under the £150,000 threshold).

• Year of full payment (baseline). Rent received £20,000. Deductible expenses £3,000. Taxable profit £17,000. Income tax at 40 percent equals £6,800. Less 20 percent s.24 reducer on £15,000 mortgage interest equals £3,000. Net tax bill £3,800. Net cash after mortgage £2,000.
• Year of 8 months paid (£13,500 received, 4 months arrears). Rent received £13,500 (cash basis: arrears not income). Deductible expenses £3,000. Taxable profit £10,500. Income tax at 40 percent equals £4,200. Less s.24 reducer £3,000. Net tax bill £1,200. Net cash after mortgage £-2,700 (loss).
• Year of 4 months paid (£6,000 received, 8 months arrears). Rent received £6,000. Deductible expenses £3,000. Taxable profit £3,000. Income tax at 40 percent equals £1,200. Less s.24 reducer, capped at the tax otherwise due of £1,200, equals £1,200. Net tax bill nil. Net cash after mortgage £-12,000 (substantial loss).

The pattern that does not appear in most landlord-tax pages: the s.24 reducer cap on a low-income year strands a portion of the basic-rate tax reducer that would, under a pre-2017 deduction-based regime, have rolled forward as a loss to set against later-year profits. Post-s.24, the reducer is use-it-or-lose-it within the year. A landlord with substantial mortgage interest and substantial arrears in the same year both pays tax on a loss-making property AND loses the tax-relief value of the unused reducer.

The Universal Credit Alternative Payment Arrangement

The Universal Credit Regulations 2013 (SI 2013/376) reg 58, read with current UC guidance, allows the landlord-direct payment of the housing element where the tenant is 2 or more months in arrears and the landlord applies via the UC Landlord Portal. Application route:

1. The landlord registers on the UC Landlord Portal at gov.uk.
2. The landlord submits the APA application with the tenant's National Insurance number, the tenancy address, the current arrears amount, the contractual rent and the landlord's bank details for direct payment.
3. The DWP assesses the application, typically within 4 to 6 weeks.
4. If approved, the housing element is paid direct to the landlord going forward, plus an ongoing contribution towards arrears (typically 10 to 20 percent of the standard allowance) deducted from the tenant's UC.
5. The APA continues until either the tenant reaches 6+ months of stable payment and applies for reinstatement of tenant-direct UC, or the tenancy ends.

The critical operational point: the APA does NOT pause possession proceedings. The landlord may continue with the Section 8 Ground 8 or Grounds 10 and 11 route in parallel where appropriate. The two operate independently, and APA is best understood as a cash-flow stabiliser rather than a possession-avoidance route.

Breathing Space and Pre-Action Discipline

Under the Debt Respite Scheme (Breathing Space Moratorium and Mental Health Crisis Moratorium) (England and Wales) Regulations 2020 (SI 2020/1311), a tenant who enters a breathing-space moratorium through an FCA-authorised debt adviser triggers a 60-day pause on possession proceedings, court fees, interest and certain enforcement action. The landlord must respect the pause. Serving a Section 8 notice during the moratorium is enforcement action capable of being challenged. The Mental Health Crisis Moratorium variant under the same Regulations has no fixed time limit while crisis treatment is ongoing.

The Pre-Action Protocol for Possession Claims by Social Landlords (CPR PD 55B) is not directly binding on private rented sector landlords but is persuasive in court conduct. Reasonable pre-action steps in the PRS context include documented written engagement with the tenant about the arrears, signposting to debt advice (StepChange, Citizens Advice, the National Debtline), and an offer of a manageable repayment plan where the tenant's circumstances suggest one is realistic. A court hearing a Grounds 10 or 11 discretionary application will give weight to the landlord's pre-action conduct.

Records and Evidence: The 5-Year Audit Trail

TMA 1970 s.12B requires a property-business taxpayer to keep records supporting the return for 5 years from the 31 January following the tax year end. For a bad-debt write-off claim under s.35, the practical evidence pack:

• The tenancy agreement.
• The rent ledger showing the period of non-payment, ideally with payment dates and method documented per receipt.
• Demand letters, email correspondence and (where used) WhatsApp or messaging records chasing payment.
• The Section 8 notice in the prescribed Form 3 format where served.
• Court papers where possession proceedings issued.
• The county court judgment where obtained.
• Evidence of attempted enforcement: instructed bailiff letter, return of warrant unsatisfied.
• Tracing-agent invoice and report where the tenant absconded.
• Insolvency filings where the tenant is bankrupt, in IVA or in a DRO.

The contemporaneous nature of the documentation is what survives the enquiry. Demand letters dated retrospectively to support a write-off year are the single most common evidential weakness; the rent ledger that dates the payment-tracking week by week is the strongest evidential foundation.

Tenanted Sale and the 60-Day CGT Reporting Window

Where a landlord sells a BTL with the tenant still in occupation (a "tenanted sale to discount", typical of arrears-burdened portfolios where the landlord chooses to exit rather than run the 7 to 9 month possession route), the disposal triggers CGT under TCGA 1992 with 60-day in-year reporting under Sch 2 paras 6 to 12, at the residential CGT rate (24 percent from 30 October 2024).

The price is typically depressed 15 to 25 percent for the sitting tenant plus arrears. The arrears outstanding at sale remain an income-tax matter; they are not capital. If irrecoverable post-sale (the new owner takes over the tenancy but the pre-sale arrears remain owed to the original landlord and are uncollectable), the original landlord can write off the pre-sale arrears under s.35 in the year of disposal subject to the usual irrecoverable-evidence test.

The 12-month landlord-sale-grounds re-letting restriction introduced by RRA 2025 s.15 (inserting HA 1988 s.16E) does not apply to a tenanted sale: it applies only where the landlord obtains possession on a sale ground and is then restricted from re-letting the property for 12 months. Tenanted-sale routes side-step the restriction because possession is not obtained.

The PRS Context: Why the Squeeze Is Now

Rent arrears in 2026 sit at the intersection of the cost-of-living squeeze on tenants, the s.24 mortgage cost compounding on landlords (now in its eighth year of full operation), and the RRA 2025 tenancy-security shift. The macro position is the WHY behind a typical landlord's arrears file; it is not a basis for legal claims. Current ONS rental data, the English Housing Survey and the NRLA quarterly landlord confidence index together set the context, and they will be updated through 2026 and 2027 as the post-RRA-2025 effects on the PRS work through.

The operational implication for the working landlord: arrears are no longer a side-effect of an individual tenant's difficulties but a structural feature of the post-RRA-2025 PRS. The tax-side discipline (cash-basis-versus-accruals clarity, the s.35 evidence pack on accruals, the s.24 squeeze modelling) and the operational toolkit (APA, breathing-space awareness, pre-action correspondence, the 13-week Ground 8 timetable) are now part of routine landlord practice rather than exceptional case management.

Adjacent Pages and Further Reading

The s.24 finance-cost-restriction mechanic and the multi-year modelling implications are covered in the section 24 cluster. The cash-basis-versus-accruals decision for property businesses is covered in the landlord-tax-essentials cluster. The voluntary-disclosure route for landlords who have under-declared rent in past years (a different problem from current-year arrears) is covered in the Let Property Campaign cluster, including our Let Property Campaign overview. The 60-day CGT reporting mechanic for residential property disposals is covered in the capital-gains-tax cluster. Together these adjacencies give the full picture: this page is the operational handbook for the arrears situation while it is live; the adjacent clusters cover the structural tax framework around it.