Why does paying for car insurance monthly cost more than paying annually?
Facts last reviewed 6 October 2026
Because paying monthly is usually a loan. The insurer or a premium finance company pays the annual premium up front and you repay it with interest, so the total you pay across the year is higher than the annual price. 47%1 of UK car insurance policies were paid for this way in 2023, and where interest is charged it typically adds 8% to 15%2 to the amount borrowed.
Monthly payment is credit, even when it does not feel like it
When you choose to pay monthly, you are rarely paying the insurer a twelfth of the premium twelve times. In most cases you are entering a credit agreement with a premium finance provider, which may be the insurer itself, a company in the same group, or a third party. The provider pays the insurer the whole annual premium on day one. You repay the provider over the year, with interest, and sometimes with an arrangement fee or charges for missed payments on top.
That is why the monthly figure on a quote multiplied by twelve rarely matches the annual price. The difference is the cost of the credit, and it should be shown on the quote as a total amount payable.
How much more it costs
The FCA's premium finance market study put numbers on this. Headline rates for premium finance were typically 20% to 30%3. Where interest is charged, it typically added 8% to 15%2 to the amount borrowed. Across the market, premium finance on car insurance alone earned £872 million4 in 2023, from about 15 million5 policies.
The FCA's final report on premium finance, published in early 2026, found that the cost of paying monthly had fallen since the Consumer Duty came into force, with customers saving around £157 million6 a year across the market. The average charge on car insurance was still about 12%7 of the premium.
Why people pay monthly anyway
Mostly because they have to. 60%8 of car insurance customers paying monthly said they did so because they could not afford a single upfront payment. The people paying the most for their cover are often the people least able to pay for it any other way, which is the part of this that the regulator has been most concerned about.
What you can do about it today
If you can pay annually, do. It is the only way to be certain you are paying the price of the insurance and nothing else. If you cannot, compare the total amount payable rather than the monthly figure, because two quotes with the same monthly payment can carry different interest and fees. Some insurers offer interest-free instalments, though on car insurance they are rare: less than 3%9 of policies paid monthly were interest free in 2023.
Where InsPay fits
InsPay is being built to take the cost of paying monthly out of car insurance without asking you to find the annual premium yourself. A lending partner pays your insurer in full on day one. You repay that same amount in instalments, with nothing added for spreading it. What you pay for is the InsPay product, and its cost is shown in full before you agree to anything.
The second half is the excess. Your policy moves to a £1,000 combined excess, which lowers what the insurer charges for the same cover, and the InsPay product includes insurance that pays that excess when you claim. So the lower premium is real and the excess never reaches you.
InsPay is not the lender and not the insurer. The credit agreement is between you and the lending partner, your motor policy stays with your insurer, and the excess cover is provided by an insurer. InsPay arranges the payment and provides the product that holds it together.