The Most Important Question You Might Be Getting Wrong
One of the most common questions when buying life insurance is simply: how much? Too little and your family may struggle. Too much and you're paying more than necessary. The right answer is personal — but there's a logical framework to work it out.
Start With What Your Family Would Need to Survive Financially
The purpose of life insurance is to replace the financial contribution you make to your family. Think about it in three layers:
- Clear outstanding debts — especially your mortgage
- Replace lost income — the salary that disappears when you do
- Cover future costs — childcare, education, day-to-day living expenses
The DIME Method
A useful framework used by financial planners is the DIME method. It helps you calculate a minimum cover amount:
- D – Debt: All outstanding debts excluding the mortgage (loans, credit cards, car finance)
- I – Income: Your annual salary multiplied by the number of years until your youngest child is independent
- M – Mortgage: The full outstanding balance on your mortgage
- E – Education: Any future education or childcare costs you'd want to fund
Add these four figures together for a solid baseline estimate of the cover you need.
Don't Forget the Non-Working Partner
If one partner doesn't work but cares for children, it's a mistake to think they need no cover. The cost of replacing full-time childcare, household management, and other unpaid work is substantial. Both partners should have life cover that reflects their real contribution to the family.
Factor in Existing Assets and Coverage
You may already have some financial safety net in place:
- Death in service benefit from your employer (often 2–4× your salary)
- Existing savings or investments
- Pension benefits that may pass to your spouse
- Any existing life insurance policies
Subtract these from your calculated need to find the gap your new policy should fill.
Worked Example
| Component | Amount |
|---|---|
| Outstanding mortgage | £220,000 |
| Other debts | £12,000 |
| Income replacement (£35,000 × 15 years) | £525,000 |
| Childcare/education | £30,000 |
| Total need | £787,000 |
| Less: death in service (£35,000 × 3) | −£105,000 |
| Less: existing savings | −£25,000 |
| Cover required | £657,000 |
How Long Should the Policy Run?
Your policy term should align with the period your family depends on your income. Common benchmarks:
- Until your youngest child reaches 21–25
- Until your mortgage is fully repaid
- Until your expected retirement age
When in doubt, choose the longer option — the cost difference is often modest.
Review Regularly
Your cover needs change as your life does. A policy that was right when you were 30 with one child may be insufficient at 40 with a larger mortgage and three children. Make it a habit to review your life insurance whenever a major life event occurs.