How Much Life Insurance Do You Need?

"Some Coverage" Isn't the Same as "Enough Coverage"

Here's a pattern that shows up constantly in financial planning conversations: someone bought a life insurance policy years ago — maybe $250,000, maybe $500,000 — because that's what a colleague had, or because it was the number a broker suggested, or because it rounded nicely. Nobody actually sat down and calculated what their family would need if the paycheck stopped tomorrow.

That's not a criticism — it's an understandable outcome of a genuinely uncomfortable exercise. Nobody wants to spend an evening calculating the financial cost of their own death. But the gap between "I have some coverage" and "I have enough coverage" can be enormous, and it's the kind of gap that only becomes visible at the worst possible moment: after it's too late to fix.

The good news is that figuring out a real number isn't complicated. It just requires being honest about a handful of categories most people never sit down and add up. That's what the rest of this article walks through.

The DIME Method: A Structured Way to Get to a Real Number

DIME is an acronym for the four categories that, added together, give you a coverage target grounded in your actual finances rather than a guess. It stands for Debt, Income replacement, Mortgage, and Education.

D — Debt

Start with everything you owe that isn't your mortgage: car loans, credit card balances, personal loans, student loans (especially private student loans, which generally don't get discharged the way federal loans sometimes do). The idea is simple — if you're gone, you don't want these balances landing on your spouse or co-signers along with everything else they're now dealing with.

I — Income Replacement

This is usually the largest and most debated piece. The standard approach is to multiply your annual income by the number of years your family would need that income replaced — commonly 10 to 15 years, depending on the age of your children, your spouse's own earning capacity, and how long you want to buffer for. A rough shorthand: annual income × years needed = income replacement need. Some people prefer a more conservative approach and calculate the lump sum that, invested conservatively, would generate their income as an ongoing withdrawal — but for most households, the simpler multiplication gets close enough for planning purposes.

M — Mortgage

Take your remaining mortgage balance. The logic here is straightforward: paying off the home means your surviving family isn't forced to sell it, downsize, or juggle a mortgage payment on top of a reduced household income. If you've already run your amortization schedule, you know this number precisely — if not, it's on your latest mortgage statement.

E — Education

Finally, add whatever you'd want set aside for your children's future education. This doesn't need to be a full four-year private university estimate — a reasonable per-child figure based on your own priorities (in-state public tuition, a partial contribution, whatever fits your family's expectations) works fine here.

Putting It Together: A Worked Example

Let's walk through a concrete household. Maria is 38, earns $85,000 a year, has two kids (ages 6 and 9), a $310,000 mortgage balance, a $22,000 car loan, and wants to set aside roughly $40,000 per child for education.

• Debt: $22,000 (car loan)
• Income replacement: $85,000 × 12 years = $1,020,000
• Mortgage: $310,000
• Education: $40,000 × 2 kids = $80,000

Add those four together: $22,000 + $1,020,000 + $310,000 + $80,000 = $1,432,000. That's Maria's DIME-based coverage target. From there, she'd typically subtract existing assets earmarked for this purpose (savings, existing smaller policies) to arrive at how much additional coverage she needs to buy — but $1,432,000 is the gross number the exercise produces before that adjustment.

Notice how different that is from a flat "buy $500,000 and call it done" approach. It's not that $500,000 is a bad number in the abstract — it's that it was never actually connected to Maria's mortgage, her kids' ages, or her income. DIME forces that connection.

The Simpler Alternative: The "10x Income" Rule of Thumb

If DIME feels like more math than you want to do right now, there's a much rougher shortcut that shows up often: buy roughly 10 times your annual income in coverage. For Maria, that would suggest $850,000 — notably lower than the $1,432,000 the DIME calculation produced.

The 10x rule isn't wrong, exactly — it's just blunt. It doesn't know whether you have a mortgage, whether it's nearly paid off or brand new, how many kids you have or how old they are, or whether you're carrying meaningful debt. Two people earning the same $85,000 salary could have wildly different actual needs — one might be a renter with no kids and no debt, the other might be Maria. The 10x rule treats them identically; DIME doesn't.

Rules of thumb are useful for a gut-check or a first pass. They're not a substitute for actually running your own numbers, which is why the DIME approach tends to be the more accurate starting point whenever you have ten extra minutes.

Term Life vs. Whole Life: The Practical Difference

Once you have a target number, the next question is what kind of policy to buy it with. This isn't a sales pitch for either option — just the factual difference that matters most for the DIME use case.

Term life insurance covers you for a fixed period — 10, 20, or 30 years — and pays a death benefit only if you die within that term. It has no investment or cash-value component. Because the insurer's risk is limited to a defined window, term premiums are generally dramatically cheaper than permanent coverage for the same death benefit, particularly when you're younger and healthier.

Whole life insurance (and other permanent policy types) is designed to last your entire life and builds a cash value component alongside the death benefit. It costs substantially more per dollar of coverage than term, because you're paying for lifelong coverage plus a savings/investment element bundled into the same product.

For the specific job DIME is solving — replacing income and covering debts during the years your family actually depends on your paycheck — term life tends to line up well with the need: it's temporary because the need is temporary. Once the mortgage is paid off, the kids are grown, and you've built enough savings to be your own life insurance policy, the coverage need generally shrinks. That's precisely the period a 20- or 30-year term policy is designed to span. Whole life serves different goals entirely — permanent estate planning needs, certain tax situations, or specific family circumstances — and those are conversations worth having separately with a licensed advisor rather than folding into a pure income-replacement decision.

Run Your Own Numbers

The math above is simple enough to do on paper, but plugging in your actual debt, income, mortgage balance, and family situation is faster with a calculator built for it. Our life insurance needs calculator walks through the DIME components and gives you a personalized coverage estimate in a couple of minutes.

A couple of related tools worth using alongside it: our net worth calculator helps you see how much of your DIME target existing assets already cover, and our mortgage payment calculator is useful for confirming your exact remaining mortgage balance if you don't have a recent statement handy.

Whatever number you land on, the point of this exercise isn't precision to the dollar — it's replacing a guess with something grounded in your actual life. That alone puts you ahead of most people carrying a policy they picked without ever doing the math.