How Much Life Insurance Do You Actually Need?
A calculation, not a round number — and why term cover matched to a defined need beats almost everything else sold to you.
- Size the policy from a gap calculation: income replacement, mortgage, debts and education, minus assets and existing cover.
- Term insurance matches most real needs, because most needs — raising children, clearing a mortgage — are themselves defined periods.
- Employer group cover is a supplement. It is rarely portable and usually a multiple of salary rather than a figure tied to your obligations.
- The most common reason a claim is contested is non-disclosure during underwriting, not the insurer refusing to pay a valid claim.
Start from the gap, not from a multiple of salary
The common advice — ten times your income — is a starting heuristic that happens to be roughly right for some households and badly wrong for others. It ignores whether you have a mortgage, how many years your children still depend on you, and what you have already saved.
The calculation that actually works has four additions and two subtractions. Add the income you want replaced multiplied by the years you want it replaced for. Add the outstanding mortgage balance. Add other debts and final expenses. Add realistic education costs per child. Then subtract liquid assets and investments, and subtract cover already in force.
What remains is the gap. That is the policy you need, and it is usually a specific and slightly odd number rather than a round one.
Deciding how many years of income to replace
This is the input with the largest effect, and it deserves an honest answer rather than a default. If your children are three and five, the dependency period runs fifteen to twenty years. If they are sixteen and eighteen, it runs three to five.
The other question is what your surviving partner would actually do. A partner who would return to full-time work needs a shorter replacement period than one who would need to stay home. Neither answer is wrong, but the policy should reflect the real plan rather than an assumed one.
Why term insurance fits most needs
Term cover insures a defined period with no cash value, which is why it costs a fraction of permanent cover for the same death benefit. Most of the needs above are themselves defined periods: children reach independence, mortgages get repaid, retirement savings eventually replace earned income.
Matching the term length to the replacement period you calculated is the decision that determines whether the cover is good value. A twenty-year term bought when your youngest is two expires roughly when they finish education. That is not a coincidence; it is the design.
When permanent cover answers a real question
Whole and universal policies cost several times more and exist for problems term insurance cannot solve: a lifelong dependant such as a disabled child, estate liquidity where assets are illiquid, or funding a business succession agreement.
They are not a better version of term insurance. They answer a different question. Buying permanent cover as a savings vehicle, when the underlying need was a twenty-year income replacement, is the most expensive common mistake in this category.
Employer cover is a supplement
Group life through work is convenient, often free or cheap, and almost always ends when the job does. Portability options exist but are usually priced far above what you would pay for an individual policy bought while healthy.
It is also typically expressed as a multiple of salary, which has no relationship to your mortgage, your children's ages or your partner's earning capacity. Treat it as a useful layer on top of a properly sized individual policy, not as the plan.
Do not skip insuring a non-earning partner
A partner without earnings still provides services with a real replacement cost: childcare, transport, household management, care of relatives. If that person died, the surviving partner would face a substantial new expense at the same moment as everything else.
The figure is smaller than an income replacement policy but it is not zero, and term cover at that level is inexpensive.
Where cover actually fails
Claims are rarely denied because an insurer decided not to pay. They are contested for three recurring reasons. First, non-disclosure during underwriting, particularly within the contestability period after the policy is issued — omitting a condition or understating alcohol or tobacco use is the classic example.
Second, lapsed premiums. A policy that lapsed six weeks before a death pays nothing, and this is more common than people expect when payment details change.
Third, an outdated or absent beneficiary. Naming an ex-spouse, or letting the benefit default to the estate, can delay or divert the payout entirely. Reviewing the beneficiary designation takes five minutes and is the highest-value maintenance task in personal finance.
A practical sequence
Run the gap calculation with real numbers. Decide the term length from the dependency period rather than from what is offered. Buy while healthy, because underwriting prices your health at application and improving it later does not reduce an existing premium.
Then set a calendar reminder to review the amount after every major change: a house move, a new child, a partner's career change, or a substantial change in savings. The gap moves, and so should the policy.
Run your own numbers
The figures above describe the method. This is the same method with your inputs in it — change anything and the result updates immediately.
Common questions
Should I buy cover for my children?
Generally the need is small — final expenses at most — since nobody depends on a child's income. The argument for it is insurability later in life, which is a real but narrow consideration.
What if I have a health condition?
Shop widely rather than assuming you are uninsurable. Underwriting varies substantially between insurers, and guaranteed issue cover exists as a last resort at a higher price.
Is return-of-premium term worth it?
It refunds premiums if you outlive the term, at a substantially higher cost. Compare against buying plain term and investing the difference, which usually wins.
How often should I review the amount?
After any major life change, and otherwise every three to five years. The gap calculation changes as debts fall and children get older.
Every figure on this page comes from a formula we publish rather than from an unattributed estimate. Where two established methods exist we show both and present the midpoint rather than the flattering one. Default values in the calculator are realistic starting points, not optimistic ones. We take no payment for coverage and no advertiser reviews our content before publication — see our editorial policy.
This is general information, not advice. Rules differ by state, carrier, lender and contract. Use it to prepare for a conversation with a qualified professional rather than to replace one.