How do you calculate how much life insurance your family actually needs?

When someone tells you to multiply your salary by ten to find your life insurance number, they are describing the income replacement method. It is a widely used starting point, and for good reason—it is simple and captures the core purpose of life insurance. But a multiplier alone rarely produces the right answer for your family. Understanding how the method works, and where it breaks down, leads to a coverage amount you can actually defend.

How the income replacement method works

The basic formula is straightforward: take your annual income and multiply it by the number of years your family would need financial support if you died tomorrow. If you earn $80,000 a year and estimate your family needs 15 years of support, the calculation points to $1.2 million in coverage. The logic is that the death benefit, invested conservatively, could generate enough income to replace what you would have earned. Most financial planners suggest a multiplier between 10 and 15, depending on your age and how many working years remain.

What the basic calculation misses

Income replacement is a floor, not a ceiling. Several significant costs fall outside the formula and need to be added on top of the salary multiplier:

• Outstanding debts: A mortgage, car loans, or student debt does not disappear when you do. If those balances are not included, your family may still lose the home even with a death benefit in hand.
• Childcare and education costs: If a surviving spouse needs to increase work hours or hire childcare, that cost is real and ongoing. College funding adds another layer that income replacement alone does not cover.
• Final expenses: Funeral costs, estate settlement fees, and any unpaid medical bills can run $15,000 to $30,000 or more and should be factored in separately.
• Existing savings and assets: The flip side is that liquid assets, existing policies, and a working spouse's income can reduce how much coverage you need. The raw multiplier ignores these entirely.

When to adjust your multiplier up or down

A 35-year-old with three young children, a large mortgage, and a non-working spouse needs a higher multiplier than someone in their fifties with grown children and substantial retirement savings. Age, family structure, debt load, and the surviving spouse's earning capacity all push the number in different directions. Treating the multiplier as a starting estimate rather than a final answer is the most important thing you can take away from the method.

What Truscott recommends

Getting the income replacement calculation right means accounting for your actual debts, dependents, and financial resources—not just running a quick salary multiplier. A Truscott coverage review walks through your full financial picture to help you arrive at a life insurance amount that genuinely protects your family, not just an approximation. Reach out to us and we will help you build a number you can stand behind.