How Much Life Insurance Do You Need?

A widely used starting point is 10 times your annual income, but the number that actually fits your household depends on your debts, how many years your dependents need support, and what coverage you already have through work. The income-replacement method turns those inputs into a specific dollar figure instead of a flat multiple, and it’s worth running even if you land close to the rule of thumb anyway.

Why a flat multiple is only a starting point

Multiples like “10x income” or “get 12x your salary” are easy to remember, which is exactly why they’re so common. They’re not wrong, but they treat a 28-year-old with a toddler and a mortgage the same as a 58-year-old whose kids are grown and whose house is paid off. Both might earn the same salary. They do not need the same coverage.

The flat multiple also ignores what you’re actually trying to replace. Life insurance exists to fill the financial hole a death leaves behind — lost income, a mortgage that still has to be paid, childcare that now has to be purchased instead of provided. A method that starts from those specific gaps will get you closer to the right number than a multiplier ever can.

The income-replacement method

The core idea is straightforward: figure out how much income your household would lose, how many years it would need to be replaced, and size the policy to cover that gap after accounting for what you already have.

Start with the income being replaced. Use the earner’s actual annual income, not household income, if you’re insuring one person. If both partners work, this exercise gets run twice — once per income.

Decide how many years that income needs replacing. A common anchor is however many years until your youngest dependent is financially independent, often stated as until they finish college or reach adulthood. A household with no dependents and no one relying on that income has a much shorter list of things to replace.

Multiply income by years, then adjust. A simple version is income × years remaining. A more complete version also adds the payoff amount on your mortgage and any other debt you don’t want to leave behind, plus a specific savings goal like future education costs, and then subtracts assets that could already cover part of the gap — existing savings, other life insurance, a spouse’s income.

Subtract what you already have. Many employers provide a base amount of group life insurance, commonly one to two times salary. That’s real coverage, but it rarely closes the full gap on its own, and it typically doesn’t follow you if you leave the job. Whatever coverage you already carry should be subtracted from your total need before you shop for more.

An example, worked through

Take a 35-year-old earning $80,000 a year, with a spouse and two young children, a $250,000 mortgage balance, and $150,000 in savings and other assets that could offset part of the gap.

Income replacement for 20 years: $80,000 × 20 = $1,600,000. Add the mortgage payoff: $250,000. That’s $1,850,000 in total needs. Subtract the $150,000 already available in savings and other assets, along with any existing coverage through work — say a $100,000 employer policy. That leaves roughly $1,600,000 in additional coverage to look for.

That’s more than 10x this earner’s income, not less, largely because of the mortgage balance and the length of the dependent window. The same household ten years later, with a paid-down mortgage and older kids, would land on a smaller number using the identical method.

What changes the number the most

Dependents and their ages. The number of years you’re replacing income is often the single largest input in the calculation. A household with no dependents may not need much beyond covering debts and final expenses. A household with a newborn is looking at a much longer runway.

Debt you don’t want to pass on. A mortgage is the common one, but student loans, especially private loans that don’t discharge on death, and other significant debt should be named specifically rather than assumed to be “covered” by a general multiple.

A spouse’s income and career flexibility. If a surviving spouse can step into more income relatively quickly, less needs to be replaced. If one spouse has been out of the workforce for years, replacing that flexibility takes longer and costs more, even though that spouse may not have a salary today.

Stay-at-home parents need coverage too. This is the gap the flat-multiple approach misses most often. A stay-at-home parent has no salary to multiply, but replacing childcare, household management, and the associated logistics has a real cost, and it’s often underestimated until a household actually has to pay for it.

Where this fits on your report card

Insurance is one of the categories a household financial report card grades, and life insurance coverage is typically evaluated against a need like the one described here rather than against a flat rule. A household can carry a policy and still be underinsured if the amount was picked years ago and never revisited against a bigger mortgage, more kids, or a spouse who left the workforce. The method matters more than the multiple, because life circumstances change and a policy amount chosen once at 28 rarely still fits at 40.

Revisit it, don’t set it once

The income-replacement number isn’t a one-time calculation. A new child, a new mortgage, a job change, or a spouse leaving or re-entering the workforce all shift the inputs meaningfully. Run the math again after any of those events, and treat the coverage you bought years ago as a starting point to check, not a number to trust indefinitely.