THE PROPERTY FILTER TAKE
Clydesdale's buy-to-let rates were due to rise from Wednesday 23 September, by 0.38% according to Mortgage Solutions and by up to 38 basis points on product transfers according to Mortgage Strategy. HSBC announced rises without saying by how much.
Run the numbers: on an illustrative £200,000 interest-only buy-to-let mortgage, a rise at the full 0.38 percentage points adds £63.33 to your monthly payment.
If your current fixed rate ends in the coming months, consider speaking to your broker about your refinancing timing and which lenders have already repriced.
Clydesdale's buy-to-let (BTL) mortgage rates were due to rise by 0.38% from Wednesday 23 September (Mortgage Solutions, 22 September 2026). HSBC has announced BTL and residential rises without saying by how much. On an illustrative £200,000 interest-only loan, a rise at the full 0.38 percentage points adds £63.33 to your monthly payment.
How much have Clydesdale and HSBC raised rates?
Mortgage Solutions (22 September 2026) reported Clydesdale's two- and five-year fixed rates rising by up to 0.19%, with BTL rates up 0.38%. Mortgage Strategy (22 September 2026) put it slightly differently. It reported BTL rises of up to 38 basis points (a basis point is one hundredth of a percentage point) on product transfer rates. Residential product transfers rise by up to 19 basis points. A product transfer is a new deal with your existing lender when your current one ends.
HSBC has not said how big its increases are (Mortgage Solutions, 22 September 2026). Mortgage Strategy reported the rises were due on 23 September. Aaron Strutt of Trinity Financial told Mortgage Strategy he expects HSBC to pull its "stand-out best buy 4.76% two-year fix and 4.72% five-year fix". That is a broker's expectation, not a confirmed withdrawal.
The moves follow rate changes at Santander, Barclays and Halifax earlier in the week. Moneyfacts puts the average two-year fixed residential rate at 5.9%, its highest since 12 April (Mortgage Solutions, 22 September 2026). The average five-year fix sits at 5.92%, its highest since 17 October 2023. Averages are a starting point, and our free property calculators let you test your own figures.
What does a 0.38% rise cost you per month?
Run the numbers on an illustrative £200,000 interest-only BTL mortgage. A 0.38 percentage point rise adds £760 a year in interest, which is £63.33 a month. For comparison, the same balance at the 0.19 point residential ceiling would cost £31.67 a month more. These are illustrative inputs, not Clydesdale's actual rates.
But your monthly payment is only half the story. Lender criteria include a stress test: the interest cover ratio, or ICR, checks that rent covers mortgage interest by a set margin. A higher rate can shrink the maximum loan a given rent supports, and our free stress test calculator shows by how much.
If your fixed rate ends soon, you may wish to speak to your broker about a product transfer versus a remortgage (moving to a new lender). Our guides on mortgages, brokers and lenders cover how to weigh that choice.
Key takeaways
Clydesdale's buy-to-let rates were due to rise by 0.38% from Wednesday 23 September, with two- and five-year fixes up by up to 0.19%, according to Mortgage Solutions.
Mortgage Strategy reported the Clydesdale buy-to-let rise as up to 38 basis points on product transfer rates.
HSBC announced buy-to-let and residential rate rises but did not say by how much.
On an illustrative £200,000 interest-only buy-to-let mortgage, a 0.38 percentage point rise adds £63.33 a month.
Moneyfacts puts the average two-year fixed residential rate at 5.9% and the average five-year fix at 5.92%, as reported by Mortgage Solutions on 22 September 2026.
Frequently asked questions
When did Clydesdale's buy-to-let rate rise take effect?
How much has HSBC raised its mortgage rates?
What does a 0.38% rise mean on a £200,000 buy-to-let mortgage?
What are average fixed mortgage rates now?
