Term vs Whole Life Insurance Calculator

Introduction to comparing a term premium stream with a whole life policy

Every "buy term and invest the difference" argument reduces to a single question: does the savings element buried inside a whole life premium earn more, after tax, than the same money would earn in an ordinary account you control? Answering that honestly is harder than it looks, because the two products are not the same kind of financial object. A term policy is a pure expense. It buys a level death benefit for a stated number of years and leaves nothing behind when the level period ends. A whole life policy is a bundle: a permanent death benefit, a contractual schedule of guaranteed cash surrender values, and, on a participating contract, a non-guaranteed dividend that the insurer may or may not pay. Setting a premium stream against an account balance without putting both on the same time-value footing, over the same horizon, at the same level of coverage, produces a number that means nothing at all.

This calculator does four things that ordinary side-by-side comparisons skip. It holds the annual outlay identical for both strategies, so no money quietly appears or disappears when the term policy expires. It applies tax to both sides, to the side fund and to any gain realised if the policy is surrendered. It refuses to add the cash surrender value on top of the death benefit, because on a traditional level-benefit contract the beneficiary receives the face amount and nothing more. And it reports the two standardised cost measures that the NAIC Life Insurance Disclosure Model Regulation (Model #580) requires insurers to disclose, the Life Insurance Surrender Cost Index and the Life Insurance Net Payment Cost Index, computed at five percent interest per thousand dollars of Equivalent Level Death Benefit.

There is deliberately no premium table behind this page. The 2017 Commissioners Standard Ordinary (CSO) tables adopted by the NAIC are a minimum statutory standard for reserves and nonforfeiture values; they are not a schedule of the gross premiums an insurer will charge a particular applicant, because gross premiums also carry expense loadings, profit margins, underwriting-class differentials and distribution costs. Any premium invented here would therefore be a fiction dressed as a quote. Every premium and every cash value in this comparison is a figure you supply from a real quote or a real illustration. The values prefilled in the form are clearly labelled illustrative teaching values used by the worked example below, not quotes.

How to use the comparison, and where each number comes from

Start by making the coverage comparable. Enter one level death benefit and use the same face amount when you request both quotes; a $250,000 term policy and a $500,000 whole life policy cannot be compared on price, and no amount of arithmetic repairs that. Enter the annual term premium and the length of the level-premium period, which for most modern products is 10, 15, 20 or 30 years. Enter the annual whole life premium exactly as quoted.

The cash surrender value is the input that decides the whole exercise, so take it from the insurer's basic illustration rather than from memory. Under the NAIC Life Insurance Illustrations Model Regulation (Model #582) a basic illustration must show guaranteed elements and their non-guaranteed counterparts separately; the non-guaranteed columns rest on the currently payable dividend or crediting scale and are not promises. Read the guaranteed cash surrender value at the policy year matching your horizon, enter it, and run the comparison. Then repeat with the non-guaranteed figure. The gap between those two runs is the honest measure of how much of the policy's case depends on values nobody has guaranteed.

Set the comparison horizon to the number of years over which you actually want to judge the decision. Set the side-fund return to a pre-tax nominal rate you are willing to defend, enter your marginal tax rate, and choose how the side fund is taxed: annually, as a plain brokerage account holding interest-bearing or high-turnover assets; deferred, with a single tax on the gain at the horizon, which approximates a buy-and-hold position liquidated at the end; or sheltered, for a Roth or similar account where no further tax applies. Press Compare the two policies. Nothing here predicts what markets will do; in the language of FINRA Rule 2210(d)(1)(F) this is a hypothetical illustration of mathematical principles, and the exception exists precisely because a calculator computes the consequences of assumptions rather than forecasting them.

The formula set behind the projection and the NAIC cost indexes

The engine starts by forcing budget neutrality. Let and be the two annual premiums. The common annual budget is

and each strategy spends exactly in every one of the years of the horizon. Whatever the insurer does not take goes into that strategy's side fund. For the term strategy the deposit in year is

where is the level term period. Once the term policy lapses no premium is due, so the entire budget is available to invest. Deposits are made at the start of each policy year, which makes every accumulation in this calculator an annuity-due, matching the convention the NAIC cost indexes use. With an effective annual growth rate , the fund at the end of year is

Under annual taxation the growth rate is netted down before compounding, with no credit taken for losses, so that a negative assumed return is not converted into a tax refund:

Under deferred taxation the fund compounds at the gross rate and a single levy falls at the horizon on the excess of the balance over the sum of deposits:

The whole life side is valued the same way. The policy's own end-of-horizon worth to a living owner is its cash surrender value , less tax on the gain over the cost of the contract, which for these purposes is the cumulative premium paid:

The break-even return, the analogue of the Linton yield actuaries use to restate a permanent policy as an equivalent savings rate, is the pre-tax rate that equalises the two after-tax endpoints. The calculator locates it by bisection on the continuous, monotone difference function:

The cost indexes follow Model #580 exactly. Premiums and death benefits are accumulated at five percent as an annuity-due and divided by the accumulation factor

which returns 13.207 at ten years and 34.719 at twenty years, reproducing the two factors written into the regulation itself. The equivalent level annual premium and the Equivalent Level Death Benefit are then

The Equivalent Level Death Benefit is what makes a term policy that expires mid-horizon comparable to a policy that does not: coverage present only in the early years accumulates to less, so the term policy is charged for the years it actually protects. The two indexes are then

SCI is the surrender cost index, the annual cost per thousand dollars of level-equivalent coverage on the assumption that you cash the policy in at the horizon. NPCI is the net payment cost index, the same figure with the cash value set to zero, which is the right measure if you intend to hold the contract until death. Lower is better in both cases.

Why the cash value is not paid on top of the death benefit

The single most common error in these comparisons is to treat a whole life policy as though it delivers the face amount and the accumulated cash value. On a traditional level-benefit contract it does not. The cash value is the owner's living benefit: the amount available on surrender, or as collateral for a policy loan. At death the beneficiary receives the face amount, and the cash value is absorbed into it. The calculator therefore reports the death benefit payable in each year as the face amount plus that strategy's side fund, never as the face amount plus the policy's cash value.

Two real exceptions are worth knowing. Participating policies often let dividends purchase paid-up additions, which increase the face amount itself; if your illustration shows a rising total death benefit, enter that larger figure rather than the base face amount. And under the cash value corridor of Internal Revenue Code section 7702(d), a contract qualifying through the guideline premium route must keep its death benefit at or above a declining multiple of cash value, which forces the face amount upward late in life. Both effects show up in an illustration as a growing death benefit column, which is where you should read them from.

Taxes on the side fund and on a surrender

The tax asymmetry is real but narrower than sales material suggests. Internal Revenue Code section 101(a)(1) provides that gross income does not include amounts received under a life insurance contract if they are paid by reason of the death of the insured, so the death benefit itself normally arrives tax free to the beneficiary. Inside the contract, cash value accumulates without current taxation as long as the contract satisfies the definition of a life insurance contract in section 7702, which requires it to meet either the cash value accumulation test or the guideline premium and cash value corridor requirements.

Surrender is different. IRS Publication 525 states that if you surrender a life insurance policy for cash you must include in income any proceeds that are more than the cost of the policy, with cost generally meaning total premiums paid less refunded premiums, rebates, dividends and unrepaid loans not already taken into income. That is exactly the calculation applied to the cash surrender value here. A side fund taxed annually loses part of its compounding every year; a side fund taxed once at liquidation loses a slice of the gain only at the end. Choosing between the three treatments changes the break-even return materially, which is why the toggle exists rather than a single hard-coded assumption.

Worked example: $500,000 of level coverage over thirty years

These figures are illustrative teaching values chosen to show the mechanics; they are not quotes and not tied to any insurer's rate manual. Suppose a healthy applicant is quoted $700 per year for a 30-year level term policy of $500,000, and $5,400 per year for a $500,000 participating whole life policy. The whole life illustration shows a guaranteed cash surrender value of $195,000 at the end of policy year 30 and a non-guaranteed value of $260,000 on the current dividend scale. The horizon is 30 years, the side fund is assumed to earn 6% before tax, the marginal rate is 22%, and the side fund is taxed annually.

The common budget is $5,400 a year, so both strategies spend $162,000 over thirty years. The term buyer pays $21,000 in premiums and deposits $4,700 every year into the side fund, contributing $141,000. At a 6% pre-tax return taxed annually the fund compounds at 4.68% and reaches $309,470.59 by the end of year 30. The whole life owner pays $162,000 in premiums and holds a guaranteed cash surrender value of $195,000; the gain over basis is $33,000, tax at 22% is $7,260, and the after-tax surrender value is $187,740. Term plus investing finishes $121,730.59 ahead.

The cost indexes are quoted per $1,000 of Equivalent Level Death Benefit per year, computed with the thirty-year accumulation factor of 69.7608. Both policies carry $500,000 of coverage for all thirty years, so both have an Equivalent Level Death Benefit of exactly $500,000 and the indexes compare directly. If the term policy were a 20-year contract inside the same thirty-year window, its Equivalent Level Death Benefit would fall well below $500,000 and its index would rise accordingly, which is the regulation's way of refusing to give a lapsed policy credit for protection it no longer provides.

Rerunning on the non-guaranteed column tells the other half of the story. A $260,000 cash surrender value carries a $98,000 gain, $21,560 of tax and a $238,440 after-tax value, and the break-even pre-tax return rises from 2.29% to 4.10%. That spread of roughly 1.8 percentage points is the value of the dividends the insurer has illustrated but not promised.

Reading the result, the crossover chart and the sensitivity table

Three outputs matter more than the headline dollar figure. The break-even return is the cleanest single number: it converts the entire policy into one interest rate you can compare against a bond ladder, a diversified fund or your own expectations. The crossover chart plots the after-tax value of both strategies against the assumed pre-tax return and marks the point where the lines meet, so you can see how sensitive the conclusion is; a chart where the lines cross at a steep angle means the answer is robust, while a shallow crossing means small changes in assumptions flip the verdict. The sensitivity table repeats the comparison across a band of returns so you can find your own comfort point rather than accepting a single assumption.

The year-by-year schedule answers a different question: what happens if the insured dies partway through. It shows, for each year, the amount the beneficiary receives under each strategy. In the early years the term buyer is usually far ahead on death benefit because coverage is cheap and the side fund is small but additive. After the level term expires the term buyer's death benefit collapses to the side fund alone, which is precisely the risk that permanent coverage exists to eliminate. If your need for coverage genuinely ends when the term does, that collapse costs nothing. If it does not, the comparison is no longer between two ways of saving but between covered and uncovered, and the arithmetic on this page cannot settle it.

Limitations of this model and the assumptions it rests on

The model is deterministic. It applies one constant return to the side fund rather than a distribution of outcomes, so it says nothing about sequence-of-returns risk or the probability of reaching any particular balance. It ignores inflation, so all figures are nominal; a real-terms view requires entering a real return and reading the results as today's dollars. It assumes premiums are level and paid annually at the start of the policy year, which matches most quotes but not modal premiums paid monthly, where the insurer's modal factor adds several percent to the annual cost.

It assumes both policies remain in force for the full horizon. That assumption is generous to whole life, because permanent policies are frequently surrendered early, and an early surrender crystallises a poor return since the acquisition costs loaded into the first policy years have not yet been recovered. It ignores policy loans, which accrue interest and reduce the death benefit; withdrawals and their tax consequences; modified endowment contract status under Internal Revenue Code section 7702A, which changes the tax treatment of distributions on heavily funded policies; term conversion privileges, which have real option value; waiver of premium, disability and long-term-care riders; and surrender charges, which are already embedded in an illustrated cash surrender value but not in an account value. It applies a single flat marginal rate to all taxable amounts, ignoring the distinction between ordinary income and long-term capital gain, state income tax, the net investment income tax, and bracket changes over a multi-decade horizon.

It also ignores estate tax planning, creditor protection, and the behavioural point that a whole life premium is a contractual commitment while a side-fund deposit is a good intention. If the difference would not actually be invested, the comparison has already been decided. Finally, illustrated non-guaranteed values are not promises: under Model #582 the insurer may not illustrate a scale more favourable than its recent actual experience supports, but dividend scales change, and only the guaranteed column is contractual. Treat every figure produced here as a hypothetical illustration of mathematical principles rather than a projection, and check any decision to replace an existing policy against a licensed adviser and the replacement disclosure rules in your state.

Questions asked before replacing or buying a policy

Sources used to build this comparison

Cost index definitions and the five percent annuity-due accumulation factors (13.207 at ten years, 34.719 at twenty years): National Association of Insurance Commissioners, Life Insurance Disclosure Model Regulation (Model #580), as codified in state law, for example the Vermont Life Insurance Solicitation Regulation (77-2). Guaranteed versus non-guaranteed illustration elements: NAIC, Life Insurance Illustrations Model Regulation (Model #582). Mortality basis: Society of Actuaries, 2017 Commissioners Standard Ordinary (CSO) Tables, adopted by the NAIC as a minimum valuation and nonforfeiture standard rather than as a pricing table. Tax treatment: IRS Publication 525, Taxable and Nontaxable Income; 26 U.S.C. 101(a)(1) on the exclusion of death benefits; 26 U.S.C. 7702 on the definition of a life insurance contract, the cash value accumulation test and the cash value corridor. Standards for presenting assumed rates of return: FINRA Rule 2210(d)(1)(F), which bars predicting or projecting performance but permits a hypothetical illustration of mathematical principles. The break-even return follows the Linton yield approach long used in actuarial policy comparison, which equates the cash available at the end of a stated period under a permanent policy and under a term-plus-side-fund program and solves for the required side-fund yield.