Life Insurance Calculator (DIME Method)

What DIME adds up — and what it doesn't claim

DIME is a rule-of-thumb needs estimate and, mechanically, a single line of addition. The engine takes four obligations, sums them, subtracts what is already in place, and floors the result at zero:

DIME total = D + I + M + E
coverage gap = max(0, DIME total − (existing coverage + liquid assets))

D is non-mortgage debts plus final expenses; I is annual income multiplied by the number of years it should continue; M is the mortgage balance to be paid off; E is the education cost per child multiplied by the number of children. Nothing in the model is compounded, discounted, or projected forward — it is a snapshot in today's dollars of what would have to be in place for the household to clear its debts, keep its income going, retire the mortgage, and fund education.

In the worked example — a mid-career household with a mortgage and two children — the four letters are $25,000 of debts and final expenses, $900,000 of income replacement ($60,000 a year for 15 years), a $250,000 mortgage payoff, and $200,000 of education costs for two children at $100,000 each — a DIME total of $1,375,000. Subtracting the $200,000 already available ($150,000 of existing coverage plus $50,000 of liquid assets) leaves an estimated additional coverage need of $1,175,000. Every result figure on this page — each DIME total, offset, gap, and comparison — is computed at build time by the same tested engine as the calculator above, so the explanation cannot drift from the tool.

What DIME does not do matters just as much: it does not estimate what a policy would cost, it does not recommend a product, an insurer, or a policy type, and it ignores investment growth on the income-replacement pool, inflation, and taxes. It is a starting point for a conversation with a licensed professional, not a quote.

The four letters, one at a time

Each input feeds exactly one term, and knowing which term a value lands in explains most surprises in the output.

D — debts and final expenses. One field, entered as a single amount and carried into the total unchanged. The engine draws no distinction between kinds of debt: a car loan, a card balance, and an allowance for final expenses are added together before they reach the calculator, and the model sees only the sum. Like the mortgage term, it is carried into the total as entered rather than multiplied.

I — income replacement. Annual income multiplied by the years it should continue. This is one of the model's two multiplications — the other is the education term — and it is why the income term usually dominates: in the example, $60,000 × 15 = $900,000, which is about 65% of the DIME total. The engine accepts a horizon from 0 to 50 years and applies no growth, no inflation escalation, and no discount to the pool — a dollar of income counted 15 years out weighs exactly the same as a dollar counted next year.

M — mortgage. The remaining balance, treated as a lump-sum payoff. The model does not ask for the payment, the rate, or the remaining term, because it is not modeling the mortgage continuing; it is sizing the amount that would retire it in one payment. Entering the balance here and choosing enough income years to keep making the payments describes the same dollars from two directions, and the engine has no guard against that overlap — the two inputs simply add.

E — education. Cost per child multiplied by the number of children. The count must be a whole number from 0 to 20; the per-child cost is whatever is entered, with no growth applied to it. With zero children the term is zero regardless of the per-child figure, which is why the field can be left blank without affecting the rest of the estimate.

Every money field must be a finite, non-negative amount, and the engine rejects one combination outright: a set of inputs whose four letters all come to zero. A DIME total of zero would describe no need at all, so the calculator reports an error in that case rather than a zero estimate.

Offsets and the coverage gap

The second line of the model subtracts what is already in place. Two optional inputs — existing life insurance coverage and liquid assets — are added into a single offsets figure and subtracted from the DIME total dollar for dollar. The engine draws no distinction between them: a dollar of existing coverage and a dollar of liquid assets reduce the gap by exactly the same amount, and neither is discounted, taxed, or delayed.

The subtraction is floored at zero. When offsets meet or exceed the DIME total, the engine sets the coverage gap to zero and raises a fully-covered flag, and the calculator reports that DIME indicates no additional coverage rather than showing a negative need. Worked example C below is that case: a DIME total of $190,000 against $250,000 of offsets produces a gap of $0. The $60,000 by which offsets exceed the total is not reported as a number — it is visible only by comparing the total and offset lines the result still shows.

What counts as "liquid" is left to the person entering the value; the model treats whatever is entered as fully spendable today. That is a simplification worth understanding, because balances held in different account types are not all equivalent at withdrawal — the point the companion guide, 401(k), Roth IRA, and Taxable Accounts: How They Fit Together, lays out account by account. The Net Worth Calculator lists the asset side of a balance sheet in the same today's-dollars terms that DIME uses, and is the natural place to assemble the figure that goes into the liquid-assets field.

Three households, three readings

The same arithmetic produces very different shapes from different inputs. Three worked examples, all computed by the engine:

Household A is the calculator's own example. The income term is about 65% of the total, so the estimate is mostly a statement about the horizon chosen; the mortgage and education terms together add $450,000, and the offsets take $200,000 back off. The gap of $1,175,000 is what the model reports.

Household B enters $12,000 of debts, $48,000 of income for 5 years, and nothing under M or E. Nearly the whole DIME total of $252,000 is the income term, so the estimate moves almost one-for-one with the years chosen — each additional year adds $48,000. With $100,000 of existing coverage the gap is $152,000. This is also the case where the DIME total lands below the 10× figure of $480,000 — the opposite of household A.

Household C enters $10,000 of debts, $40,000 of income for 3 years, and a $60,000 remaining mortgage, against $100,000 of existing coverage and $150,000 of liquid assets. The DIME total of $190,000 is smaller than the $250,000 of offsets, so the engine floors the gap at $0 and flags the household as fully covered. The 10× figure of $400,000 is still shown for comparison, and it is larger than the DIME total — because the multiplier knows nothing about offsets, it reports a figure even where the model finds the need fully met.

DIME vs. the 10×-income heuristic

Alongside every DIME result the engine returns a second figure: annual income multiplied by 10. The multiplier is a constant in the engine, labelled a heuristic, and the calculator shows it "for comparison" only. It is not a recommendation, it plays no part in the coverage gap, and it ignores debts, mortgage, education, and offsets entirely.

The two rules of thumb are more closely related than they look. Ten times income is exactly a DIME estimate with 10 income years and D, M, and E all set to zero — the build confirms it by running that input through the engine and checking that its DIME total, $600,000, equals the $600,000 heuristic. So for any set of inputs, the difference between the two is D + M + E + income × (years − 10). For household A that difference is $775,000: $475,000 of non-income obligations plus $300,000 for the five income years beyond ten. For household B, the years term is negative and the other letters are small, so DIME comes in $228,000 under the heuristic.

That decomposition is the useful part of showing both numbers. When the two estimates disagree sharply, the DIME breakdown shows exactly which obligation — or which choice of horizon — is driving the difference, and that is the input worth examining.

Where the model stops

No time dimension. DIME is pure addition. The income-replacement pool is counted at face value: no return is earned on it while it is drawn down, and the income it replaces is not escalated for inflation. The size of that omission can be read off the Retirement Withdrawal Calculator's savings-runway mode, a closed-form model in real dollars that applies growth yearly and takes the withdrawal at the end of each year. Under that model, a pool of $900,000 drawn at $60,000 a year with a 0% real return lasts exactly 15 years — the DIME assumption restated — while the same pool at an assumed 3% real return lasts about 20.2 years. DIME performs neither calculation. The site's month-by-month retirement drawdown model is a different tool again, with a different clock — nominal dollars and an explicit inflation escalator — and the methodology page notes that the two drawdown models will not agree to the month. Which direction the simplification matters depends on assumptions the model does not take, and it takes no position on them.

No probabilities. The model contains nothing about the likelihood of a claim, age, health, or how long anyone lives. It sizes an amount conditional on the need arising; it does not weigh how likely that is.

No pricing and no product. Nothing in the engine represents a premium, a policy type, a term length, or a carrier, and the page makes no claim about any of them.

No taxes. Offsets are subtracted at their entered value, and the income term is entered as a single figure with no gross-to-net adjustment.

Because the income term dominates, the horizon is the input to test first. Household A with only the income years changed:

Each five-year step moves the total by $300,000 — $60,000 a year times five — and nothing else in the row changes, which is the linearity of the I term made visible. Between the $575,000 gap at five years and the $1,775,000 gap at twenty-five, every figure in between is the same debts, mortgage, education, and offsets with a different horizon attached.

Where this fits in a retirement plan

In the model, a coverage need and retirement savings move in opposite directions: as liquid assets grow and obligations shrink, the gap closes, and once offsets pass the DIME total it floors at zero — household C is the arithmetic of that endpoint. That is why the calculator subtracts liquid assets at all. A household that has built the balance it is projecting in the Retirement Calculator may show a far smaller gap than the raw DIME total suggests, and the Net Worth Calculator is where the asset side of that picture is assembled. Which of those balances are readily spendable and which carry a withdrawal-time consequence is exactly what the companion guide, 401(k), Roth IRA, and Taxable Accounts: How They Fit Together, explains; the rest of the site's explainers are collected under Guides.

Frequently asked questions

Not financial advice: the DIME method is a general educational rule of thumb for sizing a coverage need. It does not estimate premiums, recommend products or insurers, or account for investment growth, inflation, or taxes. Talk to a licensed insurance or financial professional before making any policy decision. Values are processed locally in your browser and never transmitted. See the methodology page.