In short
Life insurance replaces the income and clears the debts your family would lose if you died. Size it with the DIME method: Debt + Income (annual pay × years needed) + Mortgage + Education, minus savings and existing coverage, which usually lands between a few hundred thousand and a few million dollars. Buy that amount as term coverage, which does the job at roughly a tenth of the cost of whole life. Permanent policies fit only narrow cases like estate-tax planning or a lifelong dependent. And if no one depends on your income, you may not need coverage at all. Run the DIME numbers to find your amount.
Life insurance is one of the most oversold products in personal finance, and the reason is structural: the policies that pay agents the largest commissions are the ones most people need the least. Cut through the sales pitch and the whole subject collapses into two honest questions: how much do I need, and what kind should I buy. Answer those with arithmetic instead of a pitch, and you'll usually end up with a simple, cheap term policy and money left over.
First: do you even need it?
Life insurance exists to protect the people who depend on your income. If your paycheck vanished tomorrow, who would be in financial trouble? A spouse, children, a co-signed loan, a business partner. Those are the people it's for. If no one depends on your income and you carry no shared debt, you may not need any coverage at all, and no one should talk you into a policy for a need that doesn't exist.
A single person with no dependents and no co-signed debt often needs little or no life insurance, maybe just enough to cover funeral costs. Don't let "everyone should have coverage" override the actual question, which is whether anyone would suffer financially without your income.
How much: the DIME method
If someone does depend on you, size the coverage with DIME, a simple checklist that captures what your family would actually need:
- D (Debt): everything you owe except the mortgage (car loans, credit cards, student loans, medical bills).
- I (Income): your annual income times the number of years your family would need it replaced (until the kids are grown, until a spouse can retire).
- M (Mortgage): the remaining balance to pay off the home.
- E (Education): the future cost of educating your children.
Add those four together, then subtract what you already have: savings, investments, and any existing coverage, including group life through work. The remainder is your coverage gap: the amount of term insurance to go buy. For a household with young kids and a mortgage, that total often runs from several hundred thousand into the low millions, which sounds enormous until you see it as "replace a decade-plus of income and clear every debt."
Term vs. whole life: the choice that actually matters
There are two broad kinds of life insurance, and the difference in cost is dramatic.
Term life is pure protection for a set number of years: 10, 20, 30. It pays out only if you die during the term, which is why it's cheap: most policies never pay. It does the exact job DIME describes (replacing income and clearing debt during the years your family depends on you), and then, ideally, you don't need it anymore because the kids are grown, the mortgage is gone, and you've built savings. This is the right product for the overwhelming majority of people.
Whole and universal life are permanent policies that never expire and build a cash value, at roughly ten times the premium of term for the same death benefit. That cash value is the selling point and the trap: it grows slowly, carries high fees, and is wrapped in a structure most buyers can't fully see through. For the same money, "buy term and invest the difference" in low-cost index funds typically leaves your family far wealthier, and better protected in the meantime, because a cheaper term premium lets you buy a bigger death benefit.
Whole life is genuinely useful in a few narrow situations: estate-tax planning for large estates, funding a business-succession buy-sell agreement, or providing lifelong support for a permanently dependent child. It's sold far more often than those cases actually occur. If a policy is being pitched to you as an "investment" or a "tax-free retirement," slow down and price the equivalent term coverage first.
Don't over-rely on work coverage
Group life insurance through your employer is a fine head start, but it's usually a fraction of the DIME number, often one or two times salary, and it disappears the day you leave the job. Treat it as a supplement that reduces your gap, not as your whole plan. Owning your own term policy means your coverage doesn't depend on your employment.
Key takeaways
- Life insurance is only for people whose income others depend on. No dependents, often no need.
- Size it with DIME: Debt + Income + Mortgage + Education, minus savings and existing coverage.
- Buy term for almost every situation: it does the job at roughly a tenth of whole-life cost.
- Whole life fits narrow cases (estate tax, business succession, a lifelong dependent), not most people.
- Employer group life is a supplement, not a plan: it's usually too small and vanishes if you leave.
The bottom line
Strip away the sales pressure and life insurance is simple: decide whether anyone depends on your income, use DIME to size the gap if they do, and buy that much term coverage. Keep the difference in cost and invest it. Reserve permanent policies for the specific, uncommon situations where they earn their price, and walk away from anyone selling whole life as an investment before you've priced the term alternative.
Life Insurance Needs Calculator →Run the DIME method (debt, income replacement, mortgage, and education), subtract what you already have, and get the term coverage number to shop for. Free, no email, open source.