About the Term vs Whole Life Calculator
This term vs whole life calculator tests the classic "buy term and invest the difference" strategy. You enter the monthly premium for a term policy and a whole life policy with the same death benefit, and it compares two paths over the same number of years: paying for whole life and building its cash value, or buying the cheaper term policy and investing the savings every year.
It is meant for anyone who has been shown a whole life illustration and wants an independent sanity check, and for people deciding how to cover a mortgage or young family. The break-even return tells you the investment return you would need to match the whole life cash value — a single number that makes the trade-off easy to judge.
Whole life cash value is modeled as the premium minus an expense load and the cost of the death cover (approximated by the term premium), growing at the crediting rate you set. Real policies front-load costs and surrender charges, so compare the result with the guaranteed and non-guaranteed columns of your own illustration. Investment returns are before tax.
With the default inputs, the buy-term-and-invest advantage is $104,008.96. Change any value above to recalculate instantly.
How to use the term vs whole life calculator
- 1Get term and whole life quotes for the same death benefit and enter both monthly premiums.
- 2Set the number of years to compare — usually the term length.
- 3Enter the return you expect on invested savings (before tax).
- 4Set the cash value growth rate and expense load from your whole life illustration, or keep the defaults.
- 5Compare the ending values and check the break-even return.
Formula and method
Both premiums are paid at the start of each year, so both sides use the future value of an annuity due. On the term path, the annual difference D = whole life premium − term premium is invested at return r. On the whole life path, each annual premium first loses the expense load, then the cost of the death benefit (approximated by the term premium, since that is what pure protection costs), and the remainder C grows at the cash value rate c.
The break-even return is found numerically: it is the rate r at which the invested difference exactly equals the estimated cash value after n years. If you would realistically expect to earn more than that in a diversified portfolio, buying term and investing comes out ahead on these assumptions. Taxes, surrender charges and policy dividends are not modelled.
- D
- Annual premium difference (whole − term)
- C
- Annual premium reaching cash value: whole × (1 − load) − term
- r
- Investment return
- c
- Cash value growth rate
- n
- Years compared
Worked examples
$500k cover: $30 term vs $450 whole life over 20 years
The $420 monthly difference ($5,040 a year) invested at 7% grows to about $221,080 in 20 years. Of the $5,400 yearly whole life premium, 15% goes to expenses and $360 covers the death benefit, leaving $4,230 a year growing at 3% — about $117,072. Investing wins by roughly $104,000, and would still tie at only a 1.4% return.
30-year comparison with a stronger policy
Investing the $6,660 yearly difference at 6% for 30 years builds about $558,119. The policy puts $5,940 a year toward cash value at 4%, reaching about $346,470 — about $211,649 less.
Cautious investor earning 4%
Even at a conservative 4%, $3,300 a year invested grows to about $68,721 over 15 years, compared with about $57,277 of cash value from $2,868 a year at 3.5%. The break-even return is only about 1.8%.
Frequently asked questions
Is it better to buy term and invest the difference?+
For most people who will actually invest the savings consistently, yes: term is far cheaper, and a diversified portfolio has historically out-earned whole life cash value. Whole life can make sense for permanent needs such as estate liquidity, a lifelong dependent, or people who would not otherwise save.
How does whole life cash value grow?+
Part of each premium goes to the insurer’s costs and the death benefit, and the rest accumulates at a guaranteed rate, plus any dividends on participating policies. Early years build very little cash value because commissions and expenses are front-loaded.
What happens when my term policy ends?+
Coverage simply stops and no money is returned. Many policies let you renew at much higher rates or convert to permanent insurance without a medical exam. The plan behind "buy term and invest" is that your savings replace the need for insurance by then.
Are whole life cash values taxed?+
Cash value grows tax-deferred, and you can usually borrow against it or withdraw up to your total premiums paid without tax. Investments in a taxable account are taxed along the way, but using a 401(k), IRA or Roth IRA removes most of that drag.
Why is whole life so much more expensive than term?+
Whole life covers you for your entire life, so the insurer expects to pay the claim eventually, and it also builds a savings component. Term only pays if you die during the term, which is unlikely for healthy young adults, so it costs a fraction as much.
Results are estimates for educational purposes and are not financial advice. Rates, fees and terms vary — confirm with your lender or a licensed advisor before making decisions.