Nationwide has changed its criteria for interest-only mortgages, and it has opened the door for more first-time buyers and homeowners to use this type of borrowing. This guide explains what the changes mean, who it helps, what to watch out for, and how to decide if it fits your plans.
Dec 2, 2025
Interest-only mortgages have always been a bit of a mystery for most buyers. They can be helpful in the right situation, but lenders have made them hard to access for years.
Now that Nationwide has relaxed the rules, you might be hearing more people talk about them again.
This guide breaks the whole thing down in simple terms so you can work out whether it is something worth exploring.
Nationwide has made five big updates:
There is one important detail here.
These products are only available through brokers, not directly from Nationwide.
If you want to explore one, you must go through an adviser.
An interest-only mortgage lets you pay only the interest each month.
This means:
But there is a catch.
When the mortgage ends, you still owe the full loan amount.
You need a plan to repay it. That could be:
This is why lenders want strong evidence that you can handle the end-of-term payment.
It is not for everyone. But there are clear groups who may benefit:
Some people prefer to keep costs down in the short term and build up savings or investments elsewhere.
If you know exactly how you will clear the loan at the end, an interest-only mortgage can work.
Downsizing later in life, waiting for a bonus, selling a business, or expecting a lump sum can make this structure helpful.
If your income swings month to month, lower mortgage payments can help with cash flow.
You will still owe the full amount at the end. If you cannot explain how you will settle the balance, it is not the right product.
Some people prefer the comfort of knowing the balance is going down every month. Interest-only does not offer that.
Nationwide requires a minimum income of £75,000 for a single applicant or £100,000 joint, so this is not accessible for everyone.
This is the biggest shift.
For years, first-time buyers were blocked from interest-only because lenders saw it as too risky.
Now they can consider it if:
If you are a first-time buyer comparing options, you can check out the full guide here:
https://www.mbnm.co.uk/services/first-time-buyers
If you want to see how repayment and interest-only stack up for your numbers, we can run the figures side by side.
Here is the simple comparison:
If you want to model the monthly difference, use the mortgage calculator here:
https://www.mbnm.co.uk/mortgage-calculator
Interest-only mortgages come with a few things you must think about:
This is why lenders check these cases so carefully.
Here is a simple five-step way to check:
If you cannot explain it in a single sentence, it is not strong enough.
£75k single or £100k joint.
Interest-only suits people who understand the trade-offs.
Lower costs can give you breathing space.
A simple side-by-side comparison often makes the choice clear.
For remortgage comparisons, you can check the dedicated page here:
https://www.mbnm.co.uk/services/remortgage
If you want to see how the Autumn Budget affects buying power, tax bands and long-term costs, you can read the Budget guide here:
https://www.mbnm.co.uk/services/remortgage
(Replace this with the final budget URL once it is live.)
These two topics connect well, because interest-only mortgages often become more attractive when taxes and monthly costs are rising.
Interest-only can be smart in the right situation.
It can also be a mistake if you jump in without a repayment plan.
That is why Nationwide only allow these products through brokers.
If you want to check whether it is a good fit for your income, property plans, and long-term goals, I can run the full figures for you and show you the safest route forward.
Feel free to get in touch for a quick, no pressure chat.
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