Term vs Whole Life Insurance Calculator
Compare your own term and whole life quotes by projecting what the saved premium difference could grow to if invested.
Content updated August 18, 2026
This calculator does not quote or estimate any premium — enter figures from your own real quotes. It runs the arithmetic behind "buy term and invest the difference" against a cash value you supply. It ignores taxes, policy loans, fees on the invested amount, and the chance the invested money is spent rather than invested. Not investment or insurance advice.
Term and whole life insurance answer different questions. Term pays a death benefit only if you die within a set period and generally costs less; whole life lasts your lifetime, generally costs more, and builds cash value you can access while alive.
This calculator does not estimate or quote either premium — you enter figures from your own real quotes. What it does is the arithmetic behind the classic "buy term and invest the difference" comparison: how much the money saved on premiums could grow to if invested, set against a whole life cash value you enter from your own policy illustration.
The Term vs Whole Life Insurance formula
Annual premium difference = whole life premium − term premium; Future value = the annual difference invested once a year, compounded annually at your chosen return, for the number of years entered; Invested advantage = future value − whole life cash value enteredthe future value calculation compounds the invested annual difference once per year over the entered horizon; entering 0 for the cash value simply omits that comparison.
Worked example
A 400 term premium against a 3,200 whole life premium is a 2,800 annual difference. Invested once a year for 20 years at a 6% return, that difference grows to about 102,999.66 — roughly 46,999.66 of growth on 56,000 contributed. Against an entered whole life cash value of 45,000 at year 20, the invested difference comes out about 57,999.66 ahead.
Assumptions, rounding, and limitations
Assumptions
- The annual premium difference is assumed to be invested in full, once per year, for every year entered.
- Investment growth compounds annually at a single rate you choose; no fees, taxes or variable returns are modeled.
- The whole life cash value is a single figure you enter for the same year as the comparison horizon, typically taken from a policy illustration.
- Both premiums are assumed to stay level for the years compared; term premiums generally rise if renewed beyond the level period, which this calculator does not project.
Rounding: All figures are computed at full floating-point precision and rounded only for currency display.
Limitations
- Does not estimate, quote or validate any premium — both premium fields are user-supplied.
- Ignores taxes, investment fees and the risk that actual investment returns differ from the entered rate.
- Assumes the entire premium difference is invested rather than spent.
- Does not model policy loans, dividends on participating whole life policies, or lapses.
- Not investment, tax or insurance advice.
Sources
- Life Insurance — National Association of Insurance Commissioners (NAIC)
- Life Insurance Roadmap — National Association of Insurance Commissioners (NAIC)
The comparison this calculator runs
Subtract your term premium from your whole life premium to get the annual amount you would save by choosing term. The calculator then treats that saved amount as if it were invested once a year at a return rate you choose, and compounds it over the number of years you enter.
That projected total is compared against a whole life cash value you supply — from your policy's own illustration, if you have one. The difference between the two is shown as the invested advantage, which can run either way.
Why no premium is estimated here
Actual life insurance premiums depend on medical underwriting, age, tobacco use, health class and the specific insurer — details this calculator cannot know and should not guess at. Using invented numbers would make the comparison meaningless, so both premium fields are yours to fill in from quotes you have actually received.
What this comparison leaves out
It assumes the entire premium difference is actually invested every year rather than spent, and it ignores taxes, fees on the invested amount, and any investment loss risk. It also ignores non-financial differences: whole life guarantees a payout whenever you die as long as premiums are paid, while term coverage ends if you outlive the term or stop renewing it.
A whole life policy's cash value and a term-plus-invest projection are not apples-to-apples in every respect — cash value is typically guaranteed by the insurer, while an investment portfolio is not.
Frequently asked questions
▶What is the main difference between term and whole life insurance?
Term life covers you for a fixed period and pays a death benefit only if you die within it. Whole life covers you for life, builds cash value, and generally costs more for the same death benefit.
▶Does this calculator tell me which policy to buy?
No. It runs the arithmetic on numbers you supply so you can see the comparison clearly; it does not recommend a policy and is not financial or insurance advice.
▶Why do I have to enter the premiums myself?
Real premiums depend on medical underwriting and insurer-specific pricing. This calculator does not fabricate or estimate rates — enter figures from quotes you have actually received.
▶What is 'buy term and invest the difference'?
A strategy of buying cheaper term coverage and investing the money you would otherwise have paid for a more expensive permanent policy. It only outperforms whole life's cash value if the difference is consistently invested and the assumed return is actually achieved.
▶Is a whole life cash value the same as an investment return?
No. Cash value accumulates inside an insurance contract under terms set by the insurer and is typically not comparable to market investment returns, which fluctuate and carry risk.
Learn more
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Open calculator →Disclaimer: Term vs Whole Life Insurance Calculator results are estimates for general information and education only, and are not financial, tax, legal or medical advice. Verify important decisions with a qualified professional.