How to use the term length calculator
Enter your age, your youngest child’s age, the age at which you expect your children to be independent, the years left on your mortgage and your planned retirement age. The calculator works out how long each need lasts and picks the longest one.
It then rounds up to a standard term length: 10, 15, 20, 25 or 30 years. Insurers commonly sell term life in these steps, and the premium on a level term policy usually stays the same for the whole term.
A second worked example
What the result means
| Result | What it means | Options to discuss |
|---|---|---|
| Standard term | A 10- to 30-year term covers your longest need | Price the suggested term and the next shorter one |
| Over 30 years | Your need lasts longer than standard terms | Laddering two policies, or permanent coverage |
| 0 years | None of the three needs applies | Coverage for final expenses or other goals, if any |
The suggested term covers the length of your need. To decide the amount, use our life insurance needs calculator.
How laddering works
Laddering means buying two or more term policies with different lengths instead of one big policy. For example, a person might hold a 30-year policy for part of the amount and a 20-year policy for the rest, so coverage steps down as the mortgage shrinks and children grow up. It can cost less than one large long policy, but it means managing more than one policy. Permanent life insurance, such as whole life, lasts for life and builds cash value, and it usually costs more for the same death benefit. Our term vs whole life insurance guide compares them.
Rules that change the answer
- Age limits. The Insurance Information Institute says most companies will not sell a term that ends past the applicant’s 80th birthday (accessed October 2026).
- Underwriting. Your health and age at application decide the price and whether a long term is offered.
- Free-look period. States set a short window, called the free-look period, when you can cancel a new life policy for a refund. New York requires at least 10 days, according to the New York Department of Financial Services (accessed October 2026); check your own state.
Common mistakes
- Choosing a term that ends just before a big need. A 20-year term that ends when your youngest is in college may leave a gap.
- Ignoring the mortgage. A new 30-year loan can be your longest duty.
- Assuming you can renew cheaply. Renewal premiums are based on your age then and can be much higher.
- Picking a length without an amount. Length and amount work together; our how much life insurance do I need guide helps with the amount.
How the calculation works in plain words
The tool measures three time spans. The first is how many years until your youngest child reaches the support age you entered. The second is how many years are left on your mortgage. The third is how many years until you plan to retire, which stands in for how long your family would rely on your paycheck. It takes the longest of the three, because coverage should last until your longest duty is over. If all three are zero or negative, the result is zero.
Next it rounds up to the next standard term length: 10, 15, 20, 25 or 30 years. For example, a need of 22 years becomes a 25-year term, and a need of 9 years becomes a 10-year term. Finally, it adds the suggested term to your current age to show how old you would be when the coverage ends. If the need is longer than 30 years, the tool does not suggest a standard term and explains the options instead.
Choosing between two nearby terms
If your need falls just above a standard length, such as 21 years, the tool suggests 25. Some people prefer the shorter 20-year term to save on premiums and accept a small gap at the end. Others choose the longer term for peace of mind. Ask for prices on both. The yearly difference between them, multiplied by the years of the term, shows what the extra years of coverage would cost. Neither choice is wrong; it depends on how much the last few years of coverage matter to your family.
Where to find your numbers
Your mortgage statement shows the remaining balance and payoff date; count the years from today. For the retirement age, use your own plan rather than a rule.
