Most people either guess their life insurance number or use a rule of thumb they read somewhere. The problem? Both approaches usually leave your family underinsured — or paying for coverage they don't need.

The good news: calculating a precise life insurance need isn't complicated once you know what to include. This guide walks you through the most reliable method financial planners use.

The Simple Rule of Thumb (and Why It Falls Short)

You've probably heard it: buy life insurance equal to 10 times your annual income. A $75,000 earner should have $750,000 in coverage. It's easy math, and it's not wrong — but it's imprecise.

The 10x rule doesn't account for your actual debts, the number of children you have, your spouse's income, your existing savings, or how many years your family would need support. Two people with the same salary can have wildly different coverage needs.

The DIME Method: A Better Approach

DIME stands for Debt, Income, Mortgage, and Education. It adds up the four major financial obligations your family would face if you passed away unexpectedly.

D — Debt

Add up all outstanding debts that would become your family's burden: credit card balances, car loans, student loans, personal loans. Don't include your mortgage here — that's handled separately.

I — Income

Multiply your annual income by the number of years your family would need financial support. If you have young children, that might be 15–20 years. If your spouse earns a good income, maybe 5–10 years. This is typically the largest component of your coverage need.

M — Mortgage

Include the remaining balance on your home loan. Your family shouldn't have to sell the house or struggle with mortgage payments if you're gone. Use your current payoff balance, not the original loan amount.

E — Education

Estimate future education costs for each child. The average four-year public university costs around $25,000–$35,000 per year — or $100,000–$140,000 total. Private universities can be double that. Multiply by the number of children you plan to put through college.

Subtract What You Already Have

Once you've added up your DIME total, subtract your existing resources: savings accounts, investment accounts, existing life insurance through work, and any other liquid assets your family could access. This gives you the actual coverage gap you need to fill.

DIME Example

Let's say you earn $80,000/year, have a $220,000 mortgage balance, $30,000 in other debts, two kids (estimating $60,000 education costs each), and $40,000 in savings:

  • Income (10 years): $800,000
  • Mortgage: $220,000
  • Debt: $30,000
  • Education (2 kids): $120,000
  • Minus savings: −$40,000
  • Total coverage needed: $1,130,000

That's significantly more than the 10x rule would suggest ($800,000). And it's based on your real situation, not an average.

Term vs Whole Life: Which Should You Buy?

For most families, term life insurance is the right choice. It's affordable, straightforward, and covers you during the years when your family is most financially vulnerable — while the kids are young and the mortgage is large.

A healthy 35-year-old can get $1,000,000 of 20-year term coverage for around $40–$60 per month. That's a remarkably low cost for the protection it provides.

When to Reassess Your Coverage

Life insurance isn't a set-it-and-forget-it purchase. Reassess your coverage whenever you have a major life change: getting married or divorced, having a child, buying a home, significant income changes, or when your term policy is approaching expiration.

Use Our Calculator

Not sure what your number is? Use our Life Insurance Calculator to run your DIME calculation instantly — no signup required.