How Do Mortgage Lenders Assess Affordability?
The short answer In 2025/2026, mortgage affordability is assessed more cautiously than ever. Lenders don’t just look at your income — they stress-test your…
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Mortgage advice usually starts with the same basics: what you can borrow, which product type fits, and how your deposit, income and credit profile affect lender choice.
Start with the practical basics below. Open the questions you care about, then use the article library underneath for deeper reads.
If you are ready to move past research, you can get mortgage advice here.
With a fixed-rate mortgage, the interest rate stays the same for the length of the deal. You will often hear these described as a two-year, five-year or ten-year fix. Your monthly repayments stay the same during that period, whatever happens in the wider market.
When the deal ends, the mortgage normally moves onto the lender’s standard variable rate unless you choose a new deal or remortgage. That standard rate is often higher, so monthly payments can rise.
Pros and cons:
A variable-rate mortgage is one where the interest you pay can go up or down over time.
Common examples include:
Pros and cons:
The standard variable rate is the lender’s default mortgage rate. It can change at any time and is often more expensive than a fixed or discounted deal.
This gives you a discount off the lender’s standard variable rate for a set period, often two or three years.
Pros and cons:
An offset mortgage links your mortgage to a savings account. Instead of earning interest on savings, the savings balance reduces the amount of mortgage interest you pay.
Example: if your mortgage is £200,000 and you hold £10,000 in linked savings, you may only pay interest on £190,000.
A cashback mortgage gives you money back when the mortgage completes, either as a fixed amount or as a percentage of what you borrow.
The cashback can help with moving costs, furniture or repairs, but the rate can sometimes be higher than on other mortgage products, so the overall cost still needs checking carefully.
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