Can You Get a Mortgage Over 40 Years?
Yes, you can get a mortgage over 40 years in the UK — and this option barely existed a decade ago. Banks used to cap mortgage terms at 30–35 years. Now you can stretch to 40, and some lenders even go further. The appeal is straightforward: a lower monthly payment. On a £200,000 mortgage at 5.4% fixed, spreading payments over 40 years instead of 25 brings your monthly cost down from roughly £1,267 to £1,078. That's £189 less every month — money that could go toward emergency savings, childcare, or just breathing room in your budget. But before you chase that lower payment, you need to see the full picture. Use our mortgage calculator to see the real numbers — and read on to understand what "lower payment" actually costs you over four decades.
How a 40-Year Mortgage Works
A 40-year mortgage is simply a home loan you repay over 40 years instead of the traditional 25 years. Your lender divides the borrowed amount into 480 monthly payments (12 × 40) rather than 300 (12 × 25).
The reason this became possible is affordability maths. Banks assess whether you can meet your monthly payments — typically capping lending at 4–4.5x your annual income. With a 25-year term, that limits borrowing power. With 40 years, the same loan becomes more "affordable" on paper because payments are spread further.
Most major UK lenders now offer 40-year mortgages, especially for first-time buyers or those with limited deposits. Nationwide, Virgin Money, and others offer terms up to 45 years on specific products. The catch: most fixed-rate deals cap at 35 years. A 40-year mortgage usually means a longer variable-rate period or a two-stage product (5-year fixed + 35-year variable, for example). With variable rates, your payment adjusts based on the Bank of England base rate — when it rises, you pay more.
Use our mortgage affordability calculator to see how different term lengths affect what you can borrow. The numbers might surprise you.
25 Years vs 30 vs 40: The Monthly Payment Trap
Here's where most people get it wrong: they see the lower monthly payment and assume they're making a better choice. They're not looking at the total.
Let's use a realistic scenario. You're buying a £200,000 flat with a £50,000 deposit (25%). Your mortgage is £150,000. Interest rate: 5.4% fixed (realistic for standard loan-to-value in early 2026).
25-year term:
- Monthly payment: £887
- Total repaid over 25 years: £266,100
- Total interest: £116,100
30-year term:
- Monthly payment: £792
- Total repaid over 30 years: £284,852
- Total interest: £134,852
40-year term:
- Monthly payment: £686
- Total repaid over 40 years: £328,320
- Total interest: £178,320
That £201 difference between 25 and 40 years looks great for your monthly budget. But you're paying an extra £62,220 in interest — on the same £150,000 borrowed. Over 40 years, you pay back more than twice what you borrowed.
The longer the term, the more you pay the lender and the less you build equity in your home. That's not a bug in the system; it's how loans work. The bank isn't being generous with lower payments — it's just spreading their profit over more years.
When a 40-Year Mortgage Makes Sense
A 40-year term isn't always a bad choice. It makes sense if:
You're a first-time buyer with limited savings. If you can save £15,000 but need to borrow £185,000 for a £200,000 property, a 25-year mortgage might push your payment above 40% of your take-home pay. A 40-year term brings it down to something manageable. Here's how to calculate your mortgage affordability — it's not just about the rate.
Your income is lower or variable. Self-employed? Commission-based pay? Teachers, carers, nurses on set scales? Lower income means lower borrowing power. A longer term lets you access mortgages you'd otherwise be locked out of. See how to get a mortgage with a low income for strategies beyond just extending the term.
You're in a temporary financial squeeze. Maybe you've taken time out of work, or you're still paying off a car loan. A 40-year term lets you borrow now when you need to, with the option to overpay (or remortgage to a shorter term) when your income improves. More on this in a moment.
You're genuinely unable to save more for a deposit. House prices have outpaced wages. In some areas, saving a 10% or 15% deposit takes a decade. If you're 35 and want to buy before you're 40, a 40-year term might be the only realistic option. Check how much deposit you actually need — it might be less than you think.
The key: don't take a 40-year mortgage because it looks easy. Take it because the alternative (waiting, renting, staying in an unsuitable home) is worse.
What 40 Years Actually Costs You
Here's the part that keeps financial advisors awake at night: the longer you borrow, the more inflation eats into your real repayment burden — but the more you lose out on building equity and investing elsewhere.
The total interest problem: On that £150,000 borrowed at 5.4% over 40 years, you pay £178,320 in interest. That's not interest on top of your mortgage; it's interest instead of savings you could have built. It's also 119% of the original loan amount — you're paying more in interest than you borrowed.
What if rates rise? If your 40-year mortgage includes a variable-rate element (tracker, SVR, or fixed expiry with no new deal locked in), and rates jump from 5.4% to 7%, your payment rises. On a £150,000 mortgage, that's roughly £200 more per month. Over 40 years, you're exposed to rate risk longer. With a 25-year mortgage, your rate fixes expire sooner — a downside in a rising-rate environment, but also protection against it lasting another 15 years.
Life happens. You'll almost certainly not keep the same mortgage for 40 years. You'll move (and can port the mortgage, usually for a fee). You'll get a pay rise or partner income changes (trigger overpayment). You might divorce or face illness. A 40-year mortgage locks you into a specific monthly target for four decades — in reality, most people remortgage 5–7 times before payoff. Each remortgage is a chance to shorten the term, but also a risk: if your credit score dips or your income drops, you might not be able to.
The point: 40 years is a long commitment to a monthly payment that might become hard to justify.
Mistakes People Make with Longer Mortgages
Borrowing the maximum just because you can. A lender might approve you for £200,000 on a 40-year term. That doesn't mean you should borrow it. Stress-test your budget: what if your partner loses a job? What if rates rise 2%? What if childcare costs jump? Use a budget calculator to understand your real monthly headroom, then borrow less than the max.
Assuming you'll never move. Most people move 5–7 times in a lifetime. Each time, you can port your mortgage to the new property — but if house prices have risen and your new property is more expensive, you'll need additional borrowing at the new property's rate. If rates have risen, this stings. A 40-year mortgage compounds this: you're 10 years into a 40-year commitment, so you'd be moving to a 30-year remaining term (and higher payments) or extending again.
Forgetting the total cost comparison. It's easy to fixate on "£686 vs £887" — the monthly difference. Harder to face "£178k vs £116k in total interest." Use our mortgage calculator to see the true cost, not just the payment.
Not comparing alternatives. Could you save longer for a bigger deposit? Take a 30-year mortgage instead? Remortgage to a shorter term once your income rises? Work out the trade-offs — extra rent while saving vs. extra interest on a longer mortgage — before committing to 40 years.
Frequently Asked Questions
Can I get a 40-year mortgage if I have poor credit? Harder, but possible. Lenders with 40-year terms tend to be larger players (Nationwide, Virgin Money, some big banks). They'll charge higher rates to offset the perceived risk. Your rate might be 1–2% higher than a borrower with excellent credit. Before you commit, check what counts as income on a mortgage application — sometimes non-standard income helps. A mortgage broker can help you find lenders who'll consider your full picture.
If I could get a 30-year mortgage instead of 40, should I? Almost always yes. You'll save tens of thousands in interest and build equity faster. The only exception: if the payment difference would force you to take on consumer debt (credit cards, personal loans) instead. Debt at 20% interest is worse than mortgage interest at 5%. But if the 30-year payment is just tight, not impossible, bite the bullet and take it.
What happens if interest rates rise on a 40-year mortgage? If you're on a tracker or SVR, your payment rises immediately. If you're fixed-rate, you're protected until the fix ends — then you remortgage at whatever rate is current. With 40 years, you're exposed to rate rises much longer. That said, the same applies to a 25-year mortgage; you're just cycling through new terms sooner. The risk is real but not unique to longer terms.
Can I pay off my 40-year mortgage early without penalties? Most mortgages let you overpay 10% of the balance per year without penalty. Some have no overpayment limit at all. If you're considering overpayment, factor it in: if you take a 40-year mortgage intending to overpay to 30 years, you're paying extra mortgage costs for the flexibility. Take a 30-year mortgage instead — it's simpler.
Do I need a bigger deposit for a 40-year mortgage? No. Lenders don't require larger deposits for longer terms. You might get a slightly better rate with a large deposit, but that applies to any term length. The advantage of a 40-year mortgage is that it lowers the payment for a given deposit, not that it requires more saving.
How does a 40-year mortgage affect how much I can borrow? It increases it. Lenders cap borrowing at roughly 4–4.5x gross household income (or 85–90% loan-to-value, whichever is tighter). Because a 40-year mortgage lowers your monthly payment, the same income supports a larger mortgage. On a £35,000 salary, you might borrow £140,000 on a 25-year term but £165,000 on a 40-year term. But remember: more borrowed means more interest.
Is it better to take a 40-year mortgage or save longer for a bigger deposit? It depends. Run the numbers: extra rent while saving £20,000 more deposit (maybe 2–3 years) vs. extra interest on a 40-year mortgage (maybe £30,000+ extra interest). Neither is obviously "right." But consider: while you're saving, house prices might rise (costing you more) or rates might change. Being a homeowner earlier means you build equity from now, not in 3 years. If you can afford the 25-year payment without hardship, do it. If you're cutting groceries to make it work, save longer or take the longer term and revisit whether to pay off faster or invest as your circumstances improve.
The Bottom Line
Yes, you can get a mortgage over 40 years — and it's a legitimate option for some people. But "can" is very different from "should."
A 40-year mortgage makes sense if you genuinely can't afford a shorter term without taking on other debt. It makes sense if you're a first-time buyer in a tight market. It doesn't make sense as a short-cut to borrowing more than you can actually afford.
Before you commit, use our mortgage calculator to run the numbers for your situation. See what 25, 30, and 40 years would cost. Then ask yourself: which payment can I comfortably afford in 5 years (after a promotion or pay rise)? And which total interest bill am I genuinely comfortable with?
The mortgage market is full of options. A 40-year term is one of them. Use it consciously, not by accident.