Have Buy-to-Let Mortgage Rates Finally Peaked?

The direction has shifted. Whether that shift lasts is a different question.

SWAP rates peaked in early April 2026 after the Middle East conflict pushed energy prices higher and rattled UK inflation expectations. Lenders pulled products and raised pricing. Buy-to-let borrowers faced some of the highest average rates in two years. Then the Bank of England held at 3.75% on 30 April. SWAP rates stabilised. Lenders started cutting again.

So yes, buy-to-let mortgage rates appear to have peaked. But there are three things landlords need to understand before acting on that conclusion.

What Drove the April Spike

Fixed-rate mortgages are priced off SWAP rates, not directly off the Bank of England base rate. SWAPs reflect market expectations for where interest rates will be over the fixed term. When those expectations shift, SWAP rates move quickly and lenders follow.

In early April 2026, two-year SWAP rates reached around 4.24%. Five-year SWAPs peaked near 4.18%. The trigger was the escalation of the Middle East conflict. Higher oil and gas prices fed through to UK inflation expectations. March CPI came in at 3.3%, up from 3.0% in February. The Bank's own Monetary Policy Report in April warned that inflation was "likely to be higher later this year."

Lenders responded fast. Around 1,300 buy-to-let products were withdrawn between early March and late April as lenders pulled deals rather than hold them at prices they could no longer fund profitably. BTL product count fell from a peak of around 5,529 to 4,764 by 27 April (Moneyfacts). Average rates moved up to 5.46% on two-year fixed deals and 5.76% on five-year fixes (Moneyfacts, 10 April 2026). Both were at their highest level in roughly two years.

Where SWAP Rates Are Now

The Bank of England's April 30 decision to hold at 3.75% did not trigger a sharp SWAP rate fall. Markets had mostly priced in a hold. What it did do was remove the immediate upside risk: the threat of a base rate rise that would have pushed SWAPs higher. That gave lenders enough certainty to start trimming.

Two-year SWAP rates are now around 3.40%, down from the April peak of 4.24%. Five-year SWAPs are around 3.55%, down from roughly 4.18% (MFB Money Markets, post-BoE decision). The easing is real. But it is partial. SWAPs have not returned to pre-conflict levels and the cuts happening at lender level are targeted rather than sweeping.

As the Mortgage One analysis of May 2026 rate movements put it, lenders are trimming margins where competitive pressure is sharpest. That is not the same as a wholesale repricing on the back of cheaper funding.

Where BTL Rates Stand

Average rates move more slowly than SWAP rates. The most recent Moneyfacts snapshot (10 April 2026) showed the average two-year BTL fixed rate at 5.46% and the average five-year fixed at 5.76%. Given how SWAPs have moved since that date, modest downward movement in the next Moneyfacts update is plausible. But averages lag the market.

Best-buy rates give a faster read. The Mortgage Works cut BTL rates by up to 0.20% in late April, bringing two-year products down to from 3.74% and five-year fixes to from 4.37%. TSB launched BTL products starting from 3.89%. West One now offers two-year deals from 3.69% and five-year fixes from 4.39%. Molo, Nationwide, HSBC, Halifax, Barclays, Skipton Building Society, and Market Harborough Building Society have all made cuts in the past few weeks.

These are headline rates with arrangement fees attached. A two-year fix at 3.74% with a 2% fee on a £200,000 loan works out at a significantly higher total cost than a five-year fix at a slightly higher rate with no fee. For a full breakdown of how to compare BTL mortgage costs properly, see BTL Remortgaging in 2026: How to Stress-Test Your Deal.

Product availability is recovering too. From the April low of 4,764 deals, choice is expected to rise as SWAPs hold steady and lenders re-enter the market with new ranges.

What "Peaked" Means, and What It Does Not

The direction appears to have changed. Average rates were climbing through March and into April. The trajectory has reversed. Lenders are competing again. That is meaningful.

But three things argue against reading too much into it.

The baseline remains elevated. A landlord rolling off a 2021 five-year fix taken at around 2.5 to 3% is still looking at 5.46% or above on a standard two-year deal. Direction of travel improved. The destination has not.

Huw Pill's dissent is a real risk signal. The Bank of England's Chief Economist was the sole dissenter at the April meeting. He voted to raise Bank Rate to 4.0%, not hold it. His argument was specific: energy price inflation risks embedding itself in UK wage and price-setting in ways that outlast the initial shock. Eight MPC members disagreed, but Pill's position reflects genuine internal debate about whether inflation risk warrants tightening rather than simply holding. If April CPI data supports his view, the June MPC meeting on 18 June could produce a surprise that pushes SWAP rates back up.

SWAP volatility can reverse quickly. The 1,300 products pulled in March and April show how fast the market can tighten. Cuts happening now reflect lenders competing for volume, not a structural drop in funding costs. A renewed energy price spike, a CPI surprise, or a shift in geopolitical risk could reverse recent SWAP easing within days.

What to Watch Before June

20 May 2026: April CPI from ONS. This is the most important data point between now and the June MPC decision. If April inflation comes in above 3.3% or accelerates further, a June cut becomes very unlikely and Pill's hawkish position gets more support. If it surprises sharply to the downside, the case for a June cut strengthens and SWAP rates are likely to ease further. Either way, SWAP markets will move within hours of the 7am release.

18 June 2026: Next MPC decision. Market pricing currently points to another hold. Governor Bailey's framing of the current situation as the "most difficult combination" suggests the Bank does not see a clear path to quick cuts. That could change if April CPI cooperates.

Energy prices and geopolitics. The Middle East situation is not resolved. A further escalation in energy prices could quickly reverse the SWAP easing of the past few weeks. This is not a forecast. It is the reason the word "peaked" should come with a question mark, not a full stop.

For more on what the April MPC decision means for landlords, see The Bank of England Has Held Again. What It Means for Landlords.

What This Means If You Are Remortgaging

Run your numbers now. Do not wait for a rate bottom that may not arrive on the timetable you are hoping for.

The ICR stress test has not changed. The PRA's Supervisory Statement SS13/16 still sets a minimum stress rate of 5.5% across mainstream and specialist BTL lenders. Lenders assess your affordability against this floor, not against the product rate they are offering. Even if average BTL rates ease to 5.0% by summer, your rental income still needs to cover 125% or 145% of the interest at 5.5%.

SVR rates typically sit at 7% or above. Sitting on SVR for six months on a £250,000 loan costs roughly £2,000 more than a five-year fix at 5.5% over the same period. The cost of waiting is real and calculable. Work it out for your specific loan size before deciding that watching and waiting makes financial sense.

Most lenders allow you to secure a rate up to six months before your current deal expires. That means you can lock in a rate today and complete the switch when your fix ends. You are not forced to choose between acting now at uncertain rates and sitting on SVR until the market moves.

Use a specialist BTL broker with whole-of-market access. Best-buy headline rates are only part of the picture. Criteria, stress test thresholds, fees, and lender flexibility on portfolio and limited company structures vary significantly across the market.

This article is for informational purposes only and does not constitute financial or investment advice. Tax rules and legislation change frequently. Always verify current rates with HMRC or GOV.UK and seek independent professional advice before making investment decisions.