Invest the premium difference between term and whole life

The 'Buy Term, Invest the Difference' Argument

Term life insurance is the cheapest form of pure insurance — a 30-year-old healthy male might pay 20 a month for a 500,000 20-year term policy. Whole life for the same coverage can run 400-600 monthly because it bundles a savings component with the insurance. Investing the 380-580 monthly premium difference at market rates usually builds more wealth than the whole life cash value.

When Whole Life Wins

High-net-worth estate planning scenarios (whole life death benefit can pass outside probate and estate tax), very long time horizons (over 40 years), or contexts where forced savings discipline matters. For most households, term plus investing beats whole life financially.

A worked example

Try the defaults: term life monthly premium of 25, whole life monthly premium of 400, term length of 20, expected investment return of 6. The tool returns 173,297.83. You can adjust any input and the result updates as you type — no submit button, no reload. That's the real power here: seeing how sensitive the output is to one or two assumptions.

What moves the number most

The result responds to Term Life Monthly Premium, Whole Life Monthly Premium, Term Length, and Expected Investment Return. Two inputs usually tip the answer one way or the other. Identify which ones matter most by flipping each value past a round threshold and watching whether the winning option changes.

The formula behind this

Monthly premium difference invested at the given annual rate compounding monthly. Applies the future value of annuity formula over the term length. Does not model whole life cash value (usually lower than this figure). Everything the calculator does is shown in the formula box below, so you can check the math against your own spreadsheet if you want.

Using this as a check-in

Re-run this every three months. A single reading tells you where you stand; four readings tell you whether things are improving. The trend matters more than any individual snapshot.

What this doesn't capture

The score is a composite of the inputs you provide. Life context — job security, family obligations, health, housing — doesn't appear in the math but shapes the real picture. Use the number as a prompt, not a verdict.