There can be many reasons for an increase in your premium

Find out more about the different factors that affect health insurance premiums

When we’re figuring out the price of your health insurance, there are a few different factors we need to think about. Some of them are about you and your lifestyle, and others are about the world around us and what’s happening in the insurance market.

Every insurer works out the cost of health insurance premiums in a slightly different way – but overall, there are four things that make prices a little higher when it’s time to renew. They are, in no particular order: inflation, claims, age, and something called medical inflation. Below, we’ll tell you all about each one and explain why they lead to your premium going up.


When we say ‘inflation’ in money terms, it means the rate at which the cost of things goes up, which means you can’t buy as much for the same amount. It measures the change in the value of money – so for example if you bought a snazzy pair of shoes for £100 a year ago and there’s an 8% rise in inflation, today those exact same shoes will be sold for £108.

Inflation doesn’t just affect the price of shoes though. It affects health insurance premiums too, so when you think about it this way, it makes sense for yours to go up every year.


If you’ve taken out a private medical insurance policy but haven’t made a claim, when it’s time to renew it you might get a No Claim Discount. This would usually make the price of your premium a little lower. On the other hand, if you have made a claim during your policy term, your premium might be higher instead. This isn’t always the case though, as every insurer out there does things slightly differently when it comes to a No Claim Discount.


Hey, we're all getting older, and aging is a factor that increases our likelihood of getting ill or injuring ourselves. That’s why insurers take our age into account when we take out health insurance – because if we’re a little older, it’s more likely we’ll need to make a claim on it.

Every insurer takes age into account in a slightly different way. Some use age bands, which means everyone who’s aged between 40-50 is in one age band, and 70-80 another age band, and so on. This means that as you get older and move from one age band to the next, the price of your premiums is likely to go up. Some insurers also raise the age-related part of your premium every year, so it happens more gradually rather than a big jump from one age band to another.

Medical inflation 

Okay – so we know what inflation is, but what is medical inflation?

Medical inflation is the term we use when we’re talking about new trends and advances in medicine – like new treatments and procedures - and the increased costs that come with them. 

Medical breakthroughs are great news, of course. It means doctors can treat serious illnesses much more easily and effectively than they could before. But at the same time, new treatments and procedures can be really expensive. And since there’s no easy way to avoid what causes medical inflation, we need to think about the medical inflation rate when we’re figuring out what your premium should be.

There are a few good things about medical inflation. For one, medical breakthroughs lead to better quality treatments that can help treat illnesses more effectively than ever before. Plus, there’s a chance these new technologies could save your life one day – or save the life of someone close to you.

We'll always aim to offer you our best deal – so we’re constantly reviewing the way we calculate your health insurance premium.  If you’d like to have a chat with us about your existing policy, feel free to give us a call on 0800 068 3827 ^ and we'll be happy to talk you through the reasons why your premium might have gone up.

^ Calls may be monitored or recorded. Calls to 0800 numbers from UK landlines and mobiles are free. Our opening hours may be different depending on which team you need to speak to.

Ready to get a quote?

If you’d like a quote, we’ll ask you to provide us with a few personal details and the date you want cover to start. We’ll also ask you about customisable cover options, like if you want anyone else added to the cover, and about any medical history you may have.

  • Get a quote online

    Get a quote via our website

    Get a quote
  • Get a quote over the phone

    Call us free on

    0808 239 7592

    • Our opening hours may vary

Calls may be monitored or recorded. Calls to 0800 numbers from UK landlines and mobiles are free. Our opening hours may be different depending on which team you need to speak to. At Aviva we operate a zero-tolerance policy on abuse of any kind. Our staff/colleagues are committed to treating you with courtesy and respect and ask that you do the same.