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Most people pick their life insurance number by guessing. A common rule says buy ten times your income, which is fast but ignores your mortgage, your debts, and how many kids you have. Two people earning the same salary can need very different amounts of coverage. The DIME method fixes that by building your number from your actual obligations.
DIME stands for Debt, Income, Mortgage, and Education. Add up those four, subtract what you already have, and you get a coverage number you can defend. It takes about fifteen minutes with a calculator.
The four parts of DIME
D is for debt. Add up everything you owe except the mortgage: credit cards, car loans, student loans, personal loans. These are bills your family would still face if your income disappeared, so the coverage needs to clear them.
I is for income. Multiply your annual income by the number of years your family would need support. If you earn $80,000 and your kids need about 15 years before they are independent, that is $1,200,000. Use after-tax income if you want a tighter number, gross if you want a cushion. The years depend on your situation: until the youngest child is grown, until a spouse retires, or whatever window fits.
M is for mortgage. Add the remaining balance on your home loan, including any second mortgage or home equity line. The point is simple: the coverage should let your family keep the house without your paycheck.
E is for education. Estimate future college costs for each child. Public university runs into six figures per child over four years; private can be several times that. Use whatever estimate fits your plans. This is the part the flat income-multiple rule always misses.
A worked example
Take a family with $40,000 in non-mortgage debt, $75,000 in annual income, a $280,000 mortgage, and $100,000 set aside as an education fund target. They want 10 years of income replacement.
- Debt: $40,000
- Income: $75,000 x 10 years = $750,000
- Mortgage: $280,000
- Education: $100,000
- Total: $1,170,000
Now subtract what already exists: savings, investments outside retirement, any current life insurance, and group coverage through work. If that adds up to $100,000, the gap is $1,070,000. That is the number to shop for, rounded to the nearest sensible policy size.
Why DIME beats the 10x rule
The 10x income rule is popular because it takes five seconds. For the family above earning $75,000, it gives $750,000. DIME gives $1,070,000 after subtracting existing assets. That is a $320,000 gap in protection the shortcut never sees.
Industry research keeps finding that most people are underinsured, with LIMRA reporting that over 100 million American adults have no life insurance or not enough. Guessing low is the common failure. DIME forces you to count the mortgage and the college bills that the multiple ignores.
That said, the 10x rule still has a job: it is a sanity check. If your DIME number and your 10x number land within about 30 percent of each other, you are in normal territory. If DIME comes out much higher, you probably have heavy obligations like a big mortgage or several kids, and you should trust the DIME number.
What DIME does not see
No worksheet captures everything. DIME does not account for a spouse’s earning power, which might shorten the income window. It does not count expected inheritances or Social Security survivor benefits. It does not model business succession if you own a company. And it treats needs as fixed, when in reality your coverage need shrinks as the mortgage balance falls and the kids grow up.
That last point matters for policy design. Many families buy a 20 or 30-year term sized to today’s DIME number, knowing the need will fade as the term runs out. That is the right instinct: match the policy length to the years your family is most exposed.
Turning your number into a policy
Once you have the DIME total, shop it as term coverage first. A healthy 35-year-old can get $1 million of 20-year term for roughly $45 to $75 a month, which means even a seven-figure DIME number usually costs less than people expect. Compare that against the average monthly cost of life insurance to calibrate your budget, and check the simple way to figure out your coverage if you want a second method to cross-check your result.
Redo the worksheet every few years or after big changes: a new baby, a new house, a paid-off loan. Your number moves as your life does. The worksheet takes fifteen minutes, and it is the difference between a number you guessed and a number you can explain.
The bottom line
Add your debts, your income times the years your family needs it, your mortgage, and your kids’ education costs, then subtract what you already have. That is your number. It will usually be higher than ten times your income, and that is the point: the obligations the shortcut ignores are exactly the ones your family would face without you.
