How Much Life Insurance Do You Need? A Simple Way to Work It Out

By Saim | Last updated: October 2026

Ask three people how much life insurance to buy and you’ll get three confident answers. “Ten times your salary.” “Whatever the agent suggests.” “Just get a million, you’ll be fine.” All three sound reasonable, and all three are basically guesses.

The trouble is that a guess feels fine right up until it’s wrong. Too little coverage and your family is left scrambling. Too much and you’re overpaying every month for protection you’ll never use. The good news is that you can get a lot closer to the right number with about twenty minutes and a calculator. No spreadsheet wizardry required.

Start With What You’re Actually Protecting

Before any math, it helps to be clear about the job this money has to do. If you died tomorrow, what would your family need the money for?

Usually it comes down to a handful of things. Replacing your income for some number of years. Paying off a mortgage or other debts. Covering funeral and final costs. Funding future expenses, like a child’s college. And for households with a stay-at-home parent, replacing the daily work that parent does, since it doesn’t stop having value just because it doesn’t come with a paycheck.

Once you see it as a list of jobs, the number stops feeling mysterious. It’s just the total of those jobs, minus what your family already has to cover them.

The Quick Rule of Thumb (And Why It Falls Short)

The most common shortcut is multiplying your annual income by 10. Earn $60,000, buy $600,000. Some versions add $100,000 per child to cover college. NerdWallet describes both of these in its guide to estimating coverage.

It’s a fine starting point, and honestly better than picking a number out of the air. But it ignores nearly everything that makes your situation yours. It doesn’t care whether you have a $350,000 mortgage or no mortgage. It doesn’t know about your savings, your spouse’s income, or the group life policy your employer gives you. And it says nothing at all about stay-at-home parents.

Use it as a sanity check at the end, not as your answer.

The DIME Method

DIME is a popular memory trick that turns the list above into four buckets.

D is for debt. Add up everything you owe other than your mortgage: car loans, student loans, credit cards. Include an estimate for final expenses like a funeral too.

I is for income. Take your annual income and multiply it by the number of years your family would realistically need support. If your youngest is 5 and you’d want income covered until they’re 22, that’s 17 years.

M is for mortgage. The amount needed to pay it off, so your family isn’t also dealing with housing costs.

E is for education. Estimated future costs for schooling or college.

Add the four together and you have a solid first number. It’s more tailored than a flat multiple, and it forces you to think about your real obligations. The one thing DIME doesn’t do is subtract what your family already has, which brings us to the better version.

The Needs-Based Method

This is the approach I’d actually recommend, because it’s the most honest. The idea is simple: add up what your family would need, then subtract what they already have.

Step one: add up the obligations.

• Your income multiplied by the years it needs replacing
• Mortgage balance
• Other debts
• College or other future costs
• Funeral and final expenses
• The cost of replacing a stay-at-home parent’s work, such as child care

Step two: subtract what’s already there.

• Savings and non-retirement investments
• Any existing life insurance, including coverage through your employer
• College funds already set aside

NerdWallet’s guidance is to leave out your home, car, and other property when counting assets, since they can take a long time to sell and your family still needs somewhere to live. It also suggests leaving out retirement accounts if withdrawing from them would trigger penalties.

Here’s a made-up example, just to show the mechanics. Say you earn $70,000 and want to cover 15 years of income. That’s $1,050,000. Add a $200,000 mortgage balance, $25,000 in other debt, $100,000 for college, and $20,000 for final expenses. The subtotal is $1,395,000.

Now subtract $50,000 in savings and a $140,000 policy through work. You land at roughly $1,205,000.

Notice how far that is from the “10 times salary” answer of $700,000. That gap is the reason the quick rule can leave families underprotected.

Don’t Forget the Stay-at-Home Parent

This is the one people skip most often. If one partner stays home with the kids, there’s no salary to multiply, so the 10x rule produces zero. But losing that parent would mean paying for child care, transportation, household help, and more, usually for years.

A reasonable approach is to estimate what it would cost to hire out those tasks and use that as the “income” in the formula. It won’t be exact, and that’s fine. It just needs to be closer than zero.

How Many Years of Income Do You Really Need?

This is the number that swings your answer the most, so it’s worth thinking about instead of defaulting to a round figure.

If your kids are young and your spouse would need years to get back to full-time work, a longer window makes sense, maybe until your youngest is financially independent. If your kids are grown and your spouse earns well, you might only need a few years of cushion plus debt payoff.

There’s no universally right answer. The goal isn’t to replace your income forever. It’s to give your family time and breathing room to adjust without making rushed financial decisions.

Adjusting for Life Changes

Your answer today won’t be your answer in ten years, and that’s a good thing. As your mortgage shrinks, your kids age, and your savings grow, your needs generally go down.

That’s one reason many people pair a needs-based calculation with term coverage, since you can match the policy length to the years you’ll actually have these obligations. If you haven’t read it yet, our comparison of term and whole life covers that choice in more detail.

Revisit the number after major events: a new baby, a new home, a divorce, a big raise, a job change that affects employer coverage. A quick recalculation each time takes ten minutes and keeps you from being quietly over or under insured.

Common Mistakes to Avoid

Relying only on your employer’s group policy is a big one. It’s often a modest multiple of your salary, and it usually disappears if you change jobs or get laid off. Treat it as a bonus, not your whole plan.

Another is forgetting inflation. Costs a decade from now will be higher than today’s, so building in some cushion is smarter than cutting it exactly to the dollar.

Buying based on what feels affordable rather than what’s needed also causes problems. Term coverage is cheap enough that, for many people, the real number is more reachable than they expect. It’s worth getting a quote for the amount you actually need before deciding it’s out of reach.

And finally, treating the calculator as final. These formulas are estimates. A licensed agent or a fee-only financial planner can help you stress-test the number against your actual situation.

A Quick Sanity Check Before You Buy

Once you’ve got your number, run it past two simple questions. First, if the full amount landed in your family’s bank account, would it realistically cover the bills for the years you planned? Walk through a month of their actual expenses and see. Second, does the number feel wildly off from the 10x rule in either direction? A big gap isn’t automatically wrong, since a large mortgage or young kids can push it way up, but it’s a signal to double-check your inputs.

If both answers feel solid, you’re in good shape. Don’t let the search for perfection delay getting covered, because the biggest risk of all is having no policy while you keep calculating.

Bottom Line

You don’t need a perfect figure. You need a reasoned one. Add up what your family would need, subtract what they already have, and don’t forget the work a stay-at-home parent does. Use the 10x rule only to check that your result isn’t wildly off.

Then get a few quotes at that amount, and take your time choosing. Twenty minutes of honest math now beats guessing and finding out years later that the guess was wrong.

This article is for general informational purposes and does not constitute insurance, legal, or financial advice. The examples are hypothetical and meant only to illustrate the math. Your own needs depend on your income, debts, family, and goals, so consider speaking with a licensed agent or fee-only financial planner before buying a policy.