Whole Life Insurance Calculator: Cash Value Return vs Buy Term and Invest

Compare whole life cash surrender value with buying term insurance and investing the premium difference. The calculator measures cash-value return on premiums, a side fund and a break-even investment return. It compares survival values at a chosen year; it does not price insurance protection or predict mortality.

How to use this tool

1. Enter annual whole life and term premiums for the same death benefit.
2. Choose the comparison period and an illustrated cash surrender value.
3. Set the side-fund return after tax and fees.
4. Enter a tax rate for surrender gain, or zero to omit that tax.
5. Compare net surrender value, side fund and the break-even return.

Formula

Cash-value IRR solves: premium × sum((1 + r)^k, k = 1…N) = surrender value

Side fund = (whole life premium − term premium) × sum((1 + i)^k, k = 1…N)

Net surrender value = cash value − tax rate × max(0, cash value − premiums paid)

Premiums are paid at each year’s start and values measured at year N’s end. The cash-value IRR is before surrender tax; the break-even side-fund return uses net surrender value. Tax basis is modeled as total premiums. Refunds, dividends, loans and withdrawals can change actual basis. Returns are nominal, with no inflation adjustment.

Example

Whole life premiums of $1,000 yearly for two years total $2,000. If surrender value is $2,000, the cash-value IRR is 0%, and modeled surrender gain is zero. A $100 annual term premium leaves $900 yearly to invest. At 10%, the side fund is $900 × 1.1² + $900 × 1.1 = $2,079, or $79 more than surrender value.