How Much Life Insurance Do I Need? A Practical Guide

The most common answer people give to "how much life insurance do you have?" is: "I'm not sure, but probably not enough." That instinct is usually right. Most people who have life insurance hold a level of cover that was set up years ago, tied to an old mortgage, or chosen without any real calculation behind it.

Getting the amount right matters in two directions. Too little cover and your family cannot maintain their financial position if you die. Too much cover and you are paying more than you need to, every month, for decades.

This guide gives you a practical method for working it out.

Start with your mortgage

Your outstanding mortgage balance is the minimum baseline for life insurance. If you die, your family should not also lose their home. A simple decreasing term life insurance policy — where the cover reduces in line with your mortgage balance — is designed exactly for this purpose and is typically the most affordable option.

If you have a repayment mortgage of £250,000 with 22 years remaining, your policy should at least cover £250,000 over 22 years. Many people stop here, which is a mistake. Your mortgage is just the floor, not the total answer.

The income replacement rule

Your dependants do not just need the mortgage paid off. They need to be able to live. A commonly used rule of thumb is to multiply your annual income by 3 to 5 times as an additional layer of cover above your mortgage.

Why 3 to 5 times? Because it represents a meaningful period during which a surviving partner can adjust: reduce hours temporarily, retrain if necessary, or simply give themselves the time and space to make good decisions rather than urgent ones. It is not a precise science, but it is a reasonable framework.

For a higher earner with young children, the upper end of that range (5 times salary or more) is more appropriate. For someone whose partner also works and earns similarly, the lower end may be sufficient.

Include your other debts and liabilities

Life insurance is not just about the mortgage. Any significant debt that would fall to your estate — or that a surviving partner would struggle to service on one income — should factor into your calculation:

• Car finance
• Personal loans
• Outstanding credit card balances
• Any informal loans from family

Add these to your mortgage balance when working out the total figure you want your policy to cover.

Do not forget funeral costs

The average funeral in the UK now costs between £4,000 and £5,000. This is a practical cost that arrives at the worst possible time. It is worth including in your calculation, even if it feels like a small number relative to everything else.

What about employer death in service?

Many employment contracts include a death in service benefit — commonly 2 to 4 times your annual salary, paid to your nominated beneficiary. This is a valuable benefit, and you should factor it into your calculation rather than ignoring it.

However, there is an important caveat: your death in service benefit leaves when you do. If you change jobs, are made redundant, or retire, that cover disappears. It should sit alongside your own life insurance policy, not replace it. Relying entirely on an employer benefit means your family's financial security is tied to your continued employment.

Joint policies vs separate policies

Couples often ask whether they should take out a joint life insurance policy or two separate ones. A joint policy pays out on the first death and then ends. Two separate policies each pay out independently.

For most couples, two separate policies offer better protection. If one partner dies, the joint policy pays out — but the surviving partner is then left without cover and must arrange new insurance, potentially at an older age and higher premium, and possibly with health conditions that increase the cost or limit the cover available.

Two separate policies cost slightly more in total, but the additional protection is usually worth it.

How cover needs change over time

Life insurance is not a set-and-forget product. Your circumstances change, and your cover should reflect that.

As your mortgage reduces, a decreasing term policy keeps pace automatically. But a level term policy — one with a fixed sum assured — stays constant even as your mortgage falls, which over time means an increasing proportion of it covers your income and dependants rather than the mortgage. That can be a deliberate strategy.

When children grow up and become financially independent, your need for cover reduces. When the mortgage is paid off, it reduces again. It is worth reviewing your policies at major life events: a new mortgage, a new child, a significant pay increase, or a divorce.

A worked example

Take a 35-year-old with a £250,000 mortgage on a 25-year repayment term, a salary of £45,000, and two young children.

The mortgage needs covering: £250,000 over 25 years. A decreasing term policy to match the mortgage balance is the starting point.

Income replacement: £45,000 multiplied by 4 equals £180,000. This is a reasonable additional lump sum to cover a period of adjustment for the surviving family.

Other debts: say £10,000 in personal loans and car finance.

Death in service: the employer provides 3 times salary, so £135,000. This can be deducted from the income replacement figure.

Net additional cover needed: £180,000 plus £10,000, minus £135,000 equals £55,000.

Total life insurance in place: the decreasing mortgage policy plus a level term policy of around £55,000 over 25 years. A level term policy of this size for a healthy 35-year-old might cost £10 to £15 per month.

This is a simplified example — your situation will have its own variables — but it illustrates the method. You are not guessing; you are working through a logical calculation.

Get advice to get it right

The figures above are a starting framework, not a prescription. Your actual needs depend on your income, your mortgage, your partner's income, your health, and the kind of lifestyle you want your family to be able to maintain.

A regulated protection adviser can model different scenarios, compare policies across the market, and make sure you are not paying over the odds for cover you do not need — or holding less than you should.

At Cover Your Family, our advisers provide free, whole-of-market advice with no obligation. If you want to know exactly how much life insurance you need, speak to one of the team today.