UK BTL lending sits inside two overlapping rulebooks: the Financial Conduct Authority's consumer-protection regime (Consumer Duty, MCOB, suitability) and the Prudential Regulation Authority's capital-adequacy framework (Supervisory Statement SS13/16, ICR stress floors, portfolio aggregation rules). Landlords almost universally collapse the two into “the lender said no” — but understanding which rulebook a particular decision comes from matters when you're trying to work around it.
The FCA's July 2025 Policy Statement PS25/11 and the related June 2025 discussion paper DP25/2 (with feedback statementFS25/6) are reshaping the consumer-protection side of mortgage lending — including explicit recognition of rent-based affordabilityfor BTL and proposals to relax loan-to-income (LTI) caps in specific scenarios. Here's what changes, what doesn't, and how it affects deal-level underwriting today.
What the review covers
PS25/11 finalised the FCA's broader policy direction on mortgage affordability, including:
- Explicit recognition that rent-based affordability is a valid assessment method for BTL applications — confirming what many specialist lenders have done in practice for years.
- Targeted relaxation of LTI caps in defined scenarios (residential context, but with read-across to portfolio landlord borrowing).
- Clarified application of Consumer Dutyto BTL products, particularly around exit fees, product transfers, and the “mortgage prisoner” cohort rolling off fixed rates onto SVRs.
- Product oversight expectations on green mortgages — fair pricing for EPC A/B premium products as the EPC C 2030 deadline approaches.
DP25/2 is the discussion paper sitting beneath PS25/11, opening specific consultation questions for industry response — including how lenders should standardise aggregate portfolio ICR calculations and how rent-based affordability should be evidenced for first-time landlords with no rental history.
Why it matters to landlords
Historically BTL has been classified as “MCOB-light” — lighter regulation than owner-occupier residential — on the basis that landlords are running an investment business and don't need the same consumer protections as homeowners. The 2025/26 review explicitly extends Consumer Duty principles to BTL, but with material flexibility for portfolio landlords on how rent stress is calculated and aggregated. The net effect for most landlords is more product choice, particularly at the entry point and for professional portfolio operators.
What does NOT change: the PRA SS13/16 stress test
The single most important point for landlords running underwriting today: the PRA 5.5% / 5-year-fix prudential stress is not changing. SS13/16 is the supervisory statement that sets the framework UK BTL lenders must apply for their own capital adequacy — it's about how much capital the bank holds against the loan, not about how the loan is sold to the customer. The FCA review touches consumer protection; SS13/16 sits with the PRA, untouched.
So when you're modelling whether a deal will pass ICR, the working numbers are still:
- Stress rate: higher of 5.5% or product rate + 2% (some lenders use the product rate flat for 5-year+ fixes)
- ICR threshold: 125% (limited company), 145% (higher-rate individual), 125–140% (basic-rate individual), 155–165% (HMO / SA / portfolio)
See our full guide to ICR for the underlying mechanics. None of those numbers are changing in 2026 or 2027 as a result of the FCA review.
What does change: first-time landlord access
Today many lenders require an applicant to be an existing residential homeowner before they'll write a first BTL. The reasoning has been pragmatic: a landlord with no property experience is a higher operational risk, and the lender doesn't have a proven track record to underwrite against. DP25/2 proposes letting lenders consider projected rental income from the subject property as part of an affordability assessment, even where the borrower has no existing landlord history.
If adopted, this should open up the first-BTL market to professionals with strong PAYE income but no homeowner status — exactly the cohort currently locked out by minimum-income and homeowner requirements. Expect specialist lenders to move first; high-street banks more slowly.
What does change: portfolio aggregation
Portfolio landlords (4+ mortgaged properties, in PRA terms) currently face per-property ICR testing plus an aggregate background stress on the whole portfolio. The discussion paper proposes standardising the portfolio-wide ICR approach — letting strong-yielding properties cross-subsidise weaker ones within a single portfolio assessment, subject to PRA approval and individual lender risk appetite.
For mixed portfolios containing some prime low-yielding London assets alongside higher-yielding regional stock, this could materially expand borrowing capacity. Today, a London asset that passes ICR by itself only marginally drags on portfolio aggregation; under the proposals, the strong regional yields could pull it through more comfortably.
What does change: green mortgages
Green BTL products — rate discounts of 5–15 bps for properties rated EPC A or B — are already offered by several lenders. The review's product-oversight focus signals expectations of broader availability and clearer pricing transparency. With EPC C mandatory from October 2030, the green-discount line will progressively shift: today's A/B premium becomes tomorrow's A-only premium, with C as the new baseline.
Timeline
| Date | Event |
|---|---|
| June 2025 | DP25/2 discussion paper and FS25/6 feedback statement published |
| 22 July 2025 | PS25/11 policy statement (Mortgage Rule Review: First steps) published |
| 19 September 2025 | Consultation period closed |
| March 2026 | FCA “Mortgages Regulatory Priorities” published |
| H2 2026 / H1 2027 | Final rules expected |
| Q2 2027 onwards | Implementation by lenders, phased rollout |
Don't restructure a portfolio on the basis of proposed rules. The most likely outcome is moderate expansion of product choice, particularly at the entry and portfolio ends, but the core ICR mechanics — driven by PRA SS13/16, not FCA rules — remain unchanged.
What it means for stressing your own deals today
For a deal you're modelling in May 2026:
- Stress the product rate to the higher of 5.5% or product + 2% — same as before.
- Apply your applicable ICR threshold (145% for higher-rate, 125% for Ltd Co) — same as before.
- If you're a portfolio landlord, model both per-property ICR and an aggregate portfolio stress — same as before, though over the next 18 months expect some lenders to publish clearer aggregate frameworks.
- For green discounts, run scenarios with and without — they're not guaranteed and product availability shifts.
See how to stress-test a buy-to-let for the full framework. The FCA review changes context, not the maths.
The headline is rent-based affordability getting formal recognition — but for landlords running deal underwriting right now, the operative numbers (5.5% PRA floor, 145% higher-rate ICR, 125% Ltd Co) don't move. Watch for product expansion in 2027; don't restructure on speculation today.
Frequently asked questions
Does this change the PRA 5.5% stress test?
No. The PRA Supervisory Statement SS13/16, which sets the 5.5% / 5-year-fix wholesale prudential stress framework that UK BTL lenders use, is entirely separate from the FCA's consumer affordability rules. SS13/16 is bank capital-adequacy regulation; PS25/11 is consumer protection. The 5.5% floor (or product rate + 2%, whichever is higher) for ICR stress remains in force and is not affected by the FCA review.
Will it be easier to get a first BTL mortgage after the review?
Likely yes — but the final rules aren't live and lender adoption will vary. The DP25/2 consultation proposes letting lenders consider projected rental income from a property the borrower hasn't yet bought as part of an affordability assessment. Today many lenders won't lend to a borrower with no existing landlord experience unless they can prove income covers the loan without rent. If the proposals are adopted, first-time landlords with strong projected yields and stable employment income should find more products available.
What's the difference between FCA and PRA rules here?
FCA = consumer protection (Consumer Duty, MCOB, suitability, treating customers fairly). PRA = bank capital adequacy and prudential stability (SS13/16, ICR stress floor, capital weightings against BTL loans). Both apply but at different layers: PRA shapes what banks must hold against the loan; FCA shapes how the loan is sold to and assessed for the customer. The 2025/26 FCA review is on the consumer-protection layer only.
Are portfolio landlords getting easier underwriting?
The proposals point that way for high-quality portfolios. Today most lenders apply ICR per property to portfolio landlords (each property must pass 145% or similar) plus an aggregate background portfolio stress. The DP25/2 consultation discusses moving toward standardised portfolio-aggregate ICR — letting strong-yielding properties cross-subsidise weaker ones — subject to PRA approval and individual lender risk appetite. Don't expect uniform adoption; portfolio specialists like Paragon, Landbay and Fleet are most likely to move first.
What's a green mortgage and does it apply to BTL?
A green mortgage is a product offering a rate discount (typically 5–15 bps) on properties rated EPC A or B. Several lenders already offer them on residential and a smaller number on BTL — Barclays, NatWest, The Mortgage Works among them. The FCA review explicitly addresses green mortgage premium pricing as part of its product oversight remit, and signals an expectation of broader availability. As EPC C becomes mandatory in 2030, the line will shift: A/B will become the bottom of the green-discount band, not B/C.
When does any of this take effect?
The PS25/11 changes — the first tranche of MRR rule simplifications — came into force on publication, 22 July 2025 (they are permissive, so lenders adopt at their own pace). DP25/2 (the broader Mortgage Rule Review discussion paper) and the accompanying feedback statement FS25/6 were published in June 2025, with the consultation window having closed 19 September 2025. The further-reaching affordability-framework rules (including the BTL rent-based affordability and portfolio-aggregate ICR questions) are still in policy development; expect a consultation paper later in 2026, final rules H2 2026 or H1 2027, and implementation from Q2 2027.
Does this affect existing mortgages I already have?
No. The review applies to new mortgage applications post-implementation. Existing fixed rates, trackers, and discounts continue under the terms they were sold on. Even at remortgage, you'd typically apply under the rules in force at application date, not the original loan date.
Is Consumer Duty live for BTL now?
Yes. Consumer Duty came into force for new and existing products on 31 July 2023, and for closed-book products on 31 July 2024. It applies to BTL lending where the borrower is an individual or small partnership (so-called "consumer BTL"). The 2025/26 review explicitly clarifies how Consumer Duty principles — fair value, customer understanding, customer support — apply to BTL products, particularly around exit fees and product transfer pricing.