The mortgage term, how long you take to repay, has a big effect on your monthly payments and the total interest you pay. Choosing it well matters. This guide explains the mortgage term: what it is, the trade-offs of longer and shorter terms, and how to choose the right length for you.
What the mortgage term is
The mortgage term is the length of time over which you repay the mortgage. The traditional term is 25 years, but terms now range widely, often from around 5 to 40 years. On a repayment mortgage, the term determines how quickly you clear the loan, and it directly affects both your monthly payment and the total interest you pay over the life of the mortgage.
Longer term: lower payments, more interest
A longer term spreads the repayment over more years, which lowers your monthly payments, making the mortgage more affordable month to month. The trade-off is that you pay interest for longer on a balance that reduces more slowly, so you pay more interest overall, as our guide to how interest is calculated explains. A longer term eases monthly cost but increases the total cost.
Shorter term: higher payments, less interest
A shorter term repays the mortgage faster, with higher monthly payments but less total interest, since the balance falls more quickly and you pay interest for fewer years. If you can afford the higher payments, a shorter term saves money overall and clears the mortgage sooner. The choice between longer and shorter is essentially a trade-off between monthly affordability and total cost.
An example
On a £200,000 mortgage at 5%, a 25-year term might cost around £1,170 a month, while a 30-year term lowers this to about £1,074, easing monthly cost but adding years of interest. A 20-year term raises the payment to around £1,320 but saves a lot of interest overall. This shows how the term lets you balance what you pay each month against what you pay in total.
Term and affordability
The term affects how much you can borrow, since a longer term lowers the monthly payment, which can help affordability, as our guide to how a mortgage works explains. Some buyers choose a longer term to make a purchase affordable, accepting the higher total interest. While this can help you buy, it is worth being aware of the extra long-term cost and keeping the term no longer than you need.
Changing the term
You can often change your term, for example when you remortgage, shortening it to clear the mortgage sooner if you can afford higher payments, or lengthening it to reduce the monthly cost, as our guide to overpaying relates. Reviewing your term at remortgage lets you adjust it to your current circumstances, so your mortgage continues to suit your budget and goals as your life changes.
Term and your age
Lenders consider your age and when the mortgage ends, since they generally want it repaid by a certain age, often around or before retirement, though later-life lending options exist. This can limit the term available to older borrowers. So the term is shaped not only by your choice but by the lender's criteria on age, which is worth bearing in mind, especially if you are borrowing later in life.
The trend towards longer terms
In recent years, more borrowers have taken longer terms, such as 35 or 40 years, to make higher house prices affordable on a monthly basis. While this lowers payments, it increases total interest and can mean borrowing into later life, as our guide to the way mortgages work notes. Longer terms can help affordability, but the long-term cost and the age at which the mortgage ends are important considerations.
Term and total cost in detail
The effect of the term on total cost can be striking. Extending a mortgage from 25 to 35 years lowers monthly payments but can add tens of thousands of pounds in interest over the life of the loan, since you pay interest on a slowly reducing balance for an extra decade. Seeing the total-cost difference, not just the monthly saving, helps you choose a term with eyes open to the long-term price.
Shortening when you remortgage
A good time to reconsider your term is at remortgage. If your income has risen, you might shorten the term to clear the mortgage sooner and save interest, accepting higher payments. If money is tight, you might lengthen it to reduce payments. Reviewing the term whenever you remortgage lets you keep it aligned with your circumstances, as our guide to overpaying relates.
Term versus overpaying
Rather than committing to a shorter term, some borrowers take a longer term for lower required payments but overpay when they can, effectively shortening it while keeping flexibility. This combines a safety net of lower compulsory payments with the saving of overpaying, as our guide to how interest is calculated explains. For those with variable income, this can be a sensible way to balance affordability and saving interest.
Balancing now and later
Choosing a term is ultimately about balancing what you can afford now against the total cost later. A longer term eases the present at the expense of the future; a shorter term does the reverse. The right balance depends on your income, other goals and how comfortable the payments are. Aiming for the shortest term you can comfortably afford generally saves money while keeping the mortgage manageable.
Choosing your term sensibly
A sensible approach is to choose the shortest term whose payments you can comfortably afford, since this minimises total interest while keeping the mortgage manageable. If that proves too tight, a slightly longer term gives breathing room, and you can overpay when you can. Avoiding the longest term unless you need it helps keep the total cost down, as our guide to how interest is calculated explains.
Reviewing the term over time
Your ideal term can change as your life does, so it is worth revisiting it at each remortgage. A pay rise might let you shorten it; a tighter budget might call for lengthening it. Treating the term as something you can adjust over time, rather than fixed for life, lets you keep your mortgage aligned with your circumstances and balance affordability against total cost as your situation evolves.
Think of the term as a dial you can adjust to balance affordable payments today against the total cost over the years, and revisit it whenever you remortgage so it keeps pace with your income, your goals and the stage of life you are at.
Get the term right for your circumstances and it works quietly in your favour for decades; get it wrong and the cost, or the strain, can follow you for just as long.
In short
The mortgage term is how long you take to repay, traditionally 25 years but ranging from around 5 to 40. A longer term lowers monthly payments but increases total interest, while a shorter term costs more monthly but less overall and clears the mortgage sooner. The term affects affordability and how much you can borrow, can often be changed at remortgage, and is shaped by the lender's age criteria.
Where to get help and next steps
Read our guides to how mortgages work, repayment versus interest-only, and how interest is calculated. This is general information, not mortgage or financial advice.