Sizing term life for a family that lives on one paycheck

Say Marcus Reyes, 36, earns $92,000 a year and is the only paycheck in his household. His wife Elena, 34, is home with their children, Priya, 6, and Noah, 3. They want to know how much term life insurance to buy and for how long, and they do not want to guess. This walkthrough follows their numbers from the first blank line to a face amount. Every figure is a hypothetical chosen so the arithmetic is easy to follow; yours will differ, and the point is the order of the steps.

The method is a needs analysis: list what the family would have to pay for, subtract what it would already have, and buy the difference. It takes about an hour with a bank statement, a mortgage statement and a Social Security account open. It beats a rule of thumb because a one-paycheck family is exactly the case where rules of thumb mislead.

Step 1: Decide what you are insuring against

The question is not "what is Marcus worth?" It is "if Marcus died this year, what would Elena and the children need paid for, and for how long?" That reframing matters, because a family does not need to replace a salary. It needs to replace the part of the salary that was paying for the people left behind.

Marcus's spending on himself stops. His commute, his lunches and his share of the groceries go away. Taxes change. The mortgage may or may not remain. So the Reyeses start with spending, not income.

Step 2: Find the survivors' annual spending

They add up twelve months of actual spending from bank statements, including taxes and savings contributions that they would keep making.

The check: $72,000 - $21,600 = $50,400, and $50,400 - $9,000 = $41,400.

Paying off the mortgage is a choice, not a rule. Some families would rather keep the loan, which often carries a lower rate than other borrowing, and fund the payments instead. The Reyeses decide that a paid-off home is the most valuable protection they can give Elena, so they treat the balance as a lump sum in Step 4 and remove the payment from the monthly need. If they keep the mortgage, they must not do both: counting the payoff and the payments together double-counts the same debt.

Step 3: Decide how many years to cover

A policy for a family with young children has to bridge the years until the children are on their own and the surviving parent has a working life that stands without the second income.

The Reyeses set the income horizon at 15 years, until Noah turns 18. They also make two assumptions about Elena that they write down so they can test them later:

• For the first three years, until Noah starts school, Elena stays home with no earnings.
• From year 4 she works part time and earns $22,000 a year, measured in current prices.

These assumptions are the softest part of the plan. A widow who is grieving and caring for two small children may take longer to work, or may find work that pays more. The way to handle that uncertainty is not to hide it but to run the numbers a second time with a harsher version, which they do in Step 7.

Step 4: Add the lump sums

Some needs are one-time payments that arrive near the start. These are the same items you will see in the The DIME method for sizing life insurance (debt, income, mortgage, education), though here the income piece is handled in its own step.

The check: $15,000 + $236,000 = $251,000; plus $20,000 is $271,000; plus $120,000 is $391,000; plus $20,000 is $411,000.

Two judgment calls are worth naming. First, the education line is a goal, not a debt. Some families fund it fully, some fund half and expect the children to borrow or work, and some leave it out and count on scholarships. Second, the transition fund is deliberately plain: it buys time to make decisions without selling a house or draining a retirement account in the first year.

Step 5: Subtract the Social Security survivor estimate

This is the step families skip, and it changes the answer. Marcus has paid into Social Security, so if he died his children and Elena, as a parent caring for children under 16, could qualify for survivor benefits. The Social Security survivor benefits and the $255 death payment guide explains who is eligible and how the family maximum works. The lump-sum death payment is only $255, so it is a footnote, not a plan; see Social Security lump-sum death payment.

The Reyeses open their my Social Security accounts and look at the survivor estimate. Say the combined family benefit, after the family maximum, comes to $3,100 a month while both children are under 18. That is $3,100 x 12 = $37,200 a year. Priya turns 18 in 12 years, so the family counts the benefit for 12 years and nothing afterward. Counting nothing for years 13 through 15 is conservative, because Noah would still be a minor then, but the family maximum and the end of Priya's benefit make the later amount hard to predict.

One more caution. Survivor benefits for a spouse who works can be reduced if earnings exceed an annual limit. For 2026 the Social Security Administration's earnings limit is $24,480 for beneficiaries under full retirement age, which is why the Reyeses set Elena's part-time pay at $22,000, below that line. They treat that as a reason to confirm the rules with the Social Security Administration before relying on the number, not as an answer.

Step 6: Build the year-by-year income gap

Now they line up the survivors' need of $41,400 against what would already be coming in.

Years 1 to 3: $41,400 - $37,200 = $4,200 a year, and $4,200 x 3 = $12,600. Years 13 to 15: $41,400 - $22,000 = $19,400 a year, and $19,400 x 3 = $58,200. The total income gap is $12,600 + $58,200 = $70,800.

Notice what happened in years 4 to 12. Elena's pay and the survivor benefits together exceed the need, so the gap is zero. The Reyeses do not count that surplus of $17,800 a year as a credit against the lump sums. They leave it as a cushion for inflation, for the chance that the benefit is smaller than the estimate, and for the possibility that Elena earns less than planned. Counting it would make the policy look cheaper on paper and the plan more fragile in practice.

Step 7: Total the need and subtract what you already have

The check: $411,000 + $70,800 = $481,800; $481,800 - $25,000 = $456,800; $456,800 - $92,000 = $364,800.

Whether to count the group coverage is the most important judgment in this table. group life insurance through an employer is often one or two times salary at no cost, but it generally ends when the job does, with a conversion or portability window that usually lasts about 31 days. Marcus's employer might lay him off, he might change jobs, or he might become sick and be unable to work, which is exactly when conversion would be hardest. The employer group life insurance: what it really covers and keeping group life insurance when you leave a job guides cover the details. The Reyeses decide to size the individual policy so that it works without the group coverage, and to treat the work benefit as a margin of safety.

The stress test

Now they run the harsher version of their own assumptions. Suppose the Social Security survivor benefits turn out to be half the estimate: $18,600 a year. They recompute the gap.

• Years 1 to 3: $41,400 - $18,600 = $22,800 a year, times 3 is $68,400.
• Years 4 to 12: $41,400 - $22,000 - $18,600 = $800 a year, times 9 is $7,200.
• Years 13 to 15: unchanged at $58,200.

The stressed income gap is $68,400 + $7,200 + $58,200 = $133,800, which is $63,000 more than the base case of $70,800. The stressed need is $456,800 + $63,000 = $519,800.

So the Reyeses' plan lives between $456,800 and $519,800 without the work coverage. They round to $500,000, which sits inside that range and leaves the employer benefit as extra margin.

For comparison, the common 10 times income rule would suggest 10 x $92,000 = $920,000. That rule is a starting point, not a verdict; the income replacement: the 10x rule and better ways guide explains where it works and where it overshoots. The Reyeses' number is lower because their lump sums are modest and Social Security and Elena's future work carry part of the income load. A family with more debt, a spouse who cannot work, or no survivor eligibility would land far above the rule.

Step 8: Choose the term length

The face amount answers how much. The term answers how long. The family has three clocks running:

1. Children's dependence. Noah turns 18 in 15 years and finishes college in about 19 or 20.
2. The mortgage. Say 24 years remain on the current loan.
3. Elena's independence. The plan assumes she is working by year 4, so the income gap shrinks over time.

A level term insurance policy keeps the premium and the death benefit fixed for the chosen period. A 20-year term covers Noah to age 23, which includes college. It ends before the mortgage does, but by then the balance will be a fraction of today's $236,000 and Marcus, at 56, will have had time to save. A 15-year term would cost less per month but would end when Noah is 18, before his tuition bills. A 30-year term would outlast the mortgage but would cost more for coverage the family would not need in its last decade. The how long a term should you buy: 10, 20 or 30 years guide and the How long a term do I need? help test the trade-off.

Some families split the need into two policies with different lengths, so the larger amount runs only through the heaviest years. That is a ladder, described in laddering term life policies to match your needs, and it can reduce cost when the need shrinks over time. The Reyeses ask for quotes for a single $500,000 20-year policy and for a pair of policies, then compare. The price of each is something to get from an agent or quote tool; this post does not state one.

Three mistakes this method avoids

Families who skip the steps tend to make one of three errors, and the Reyeses' worksheet is built to catch each.

The first is buying the number from a headline. A rule such as ten times income, or a figure from an advertisement, is a single guess. In the Reyeses' case it would have been nearly double their worked answer. It might also have been too low for a family with a special-needs child or a large business debt. A rule cannot know which family it is talking to.

The second is treating the survivor's job as a certainty or an impossibility. Assuming Elena will quickly earn a full salary makes the policy too small; assuming she never can makes it larger than the family may want to pay for. Writing the assumption down, with a start year and a pay figure, lets you change it and see the effect on the final number.

The third is forgetting that the coverage you have may not last. Group life that ends with a job, a policy that expires before the youngest child is grown, or a term chosen to match the mortgage and nothing else all leave a gap at the moment it hurts most. The point of the term-length step is to find that gap on paper before it appears in life.

Step 9: Check what the plan leaves out

Before they apply, the Reyeses write down what the $500,000 does not cover.

• Elena's own coverage. If she died, Marcus would face childcare and household costs. The life insurance for stay-at-home parents guide and the post insuring a stay-at-home parent: how much term cover and for how long work through that question, which is a separate calculation with a smaller face amount.
• Inflation. The figures use current prices. Costs in year 12 will be higher. The surplus in years 4 to 12 is one cushion; the inflation and your death benefit shows the effect of rising prices on a fixed death benefit.
• Disability. A long illness or injury would cut Marcus's pay without paying a death benefit. Life insurance is the wrong tool for that risk, though a waiver of premium rider can keep the policy alive. Disability coverage is a separate subject.
• Taxes and investment. Death benefits paid to a named beneficiary are generally income-tax-free, but invested proceeds may earn taxable returns. A fee-only planner can help Elena handle a lump sum.
• Beneficiary choice. With minor children, naming them directly causes problems; a trust or custodian arrangement should be discussed with an attorney.

A short worksheet you can copy

Reproduce the table on paper with your own numbers:

1. Annual household spending today: ______
2. Subtract spending that stops or ends (the insured's share, the mortgage if you will pay it off): ______
3. Equals the survivors' annual need: ______
4. Years to cover: ______ (often until the youngest child is 18)
5. Survivor's expected pay, by phase: ______
6. Social Security survivor estimate (from ssa.gov), and the years it lasts: ______
7. Income gap by phase, then add: ______
8. Lump sums: final costs, debts, education, transition fund: ______
9. Gross need = income gap + lump sums: ______
10. Subtract usable savings and any coverage that will stay in force: ______
11. Stress test: cut the Social Security figure in half and the survivor's pay by a quarter, and recompute: ______
12. Round to a face amount inside your range, and choose a term that reaches the youngest child's college years: ______

The How much life insurance do I need? can do the arithmetic once you have the inputs.

Key takeaways

• Start from what the survivors will spend, not from the insured's salary, and be careful not to count the mortgage both as a payoff and as a monthly payment.
• Count Social Security survivor benefits from the family's own account estimate, but keep a cushion and test a case where they are lower.
• Do not rely on employer group life to carry the plan, because it generally ends with the job and conversion windows are short.
• Run the numbers twice, once on your base assumptions and once on a harsher set, then choose a round face amount inside the range.
• Match the term to the clocks that matter most, usually the youngest child's schooling, and consider a ladder if the need shrinks over time.