How this comparison works
Each year, whole life costs more than term for the same death benefit. We treat that yearly gap as money you could invest instead, and grow it as an ordinary annuity at the return you choose:
Whole − Term. Invested at the end of each year for the period, its future value is Difference × ((1 + r)n − 1) ÷ r, where r is your return and n the number of years. We also total the premiums each path pays in over the period.The headline is what that invested difference could become. We compare it against the total premiums you'd pour into whole life over the same years. We deliberately do not guess your whole life policy's cash value — that varies wildly by insurer and product, and the honest comparison is "premiums paid vs. what the freed-up money could earn." If your real cash-value illustration beats the side fund shown here, that's a point for the whole life policy worth weighing.
One caveat the math can't show: this assumes you actually invest the difference every year. Whole life's forced-savings discipline is a real behavioral advantage for some people. The numbers below are the ceiling for the term strategy, not a promise.
Common questions
What does "buy term and invest the difference" mean?
Whole life premiums are typically 5–15× higher than term premiums for the same death benefit. "Buy term and invest the difference" is the strategy of purchasing cheaper term life and investing the money you save each year. Over a long horizon, that side fund can grow far larger than the cash value a whole life policy builds — this calculator estimates by how much.
Is term life really that much cheaper than whole life?
Almost always, yes — for the same death benefit. Term covers a fixed period (say 20 or 30 years) with no cash value, so nearly all of your premium pays for pure insurance. Whole life is permanent and bundles a savings component, which is why it costs several times more. Plug in real quotes for both to see the gap in dollars.
Does whole life build cash value I should count?
Yes — whole life accumulates cash value you can borrow against or surrender. But in the early years that cash value is usually well below the premiums you have paid in, and growth is modest (often 2–4% net of fees). This tool compares the whole life premiums you would pay against what the same money could earn invested separately, so you can judge whether the bundled savings is worth the premium.
When does whole life actually make sense?
Permanent coverage can fit a permanent need: estate-tax liquidity, a lifelong dependent with special needs, or a business buy-sell agreement. For the far more common goal of protecting your family while the kids grow up and the mortgage gets paid, level term plus disciplined investing usually wins on the math.
What investment return should I assume?
Be realistic. A diversified stock-and-bond portfolio has historically returned roughly 6–8% annually before inflation over long periods, but no return is guaranteed and sequence-of-returns risk is real. Try a conservative figure (5–6%) to stress-test the comparison rather than the most optimistic one.