Introduction to term life premiums and the mortality curve
This is an educational rate model, not a quote. Only a licensed insurer that has underwritten you can tell you your real premium.
A level term life policy is a bet with fixed odds: you pay the same premium every year for a fixed number of years, and the insurer pays a fixed death benefit if you die inside that window. The entire price comes from one input the insurer cares about above all others, the probability that you die in each year of the term. That probability is written and read as "the chance a person aged x dies before reaching x plus one". It roughly doubles every eight years of adult life, which is why waiting is expensive and why the cost curve on this page is drawn on a logarithmic scale.
Plain-text formula: qRate(t) = basePopulationQ(age + t, sex) * classFactor * tobaccoFactor * selectionFactor(t); selectionFactor(t) = 0.08 + 0.52 * min(1, t / 25); netSinglePremium = sum over t of v^(t+1) * survival(t) * qRate(t) with v = 1 / (1 + i); annuityDue = sum over t of v^t * survival(t); netAnnualPremium = coverage * netSinglePremium / annuityDue; grossAnnualPremium = netAnnualPremium / (1 - 0.20) + 60; monthlyPremium = grossAnnualPremium * 1.08 / 12.
Source metadata: the annual death probabilities are the United States Social Security Administration 2023 period life table (ages 18 to 100, published in the 2026 Trustees Report), extended above age 100 by holding the final mortality growth ratio constant. Class multipliers, the selection factor, the expense load and the policy fee are transparent modelling assumptions listed in full below, not filed carrier rates. Last reviewed August 2026.
How to use this term life premium estimator
- Enter your age at issue. This is the age the policy is written at, between 18 and 75. Try your current age and your age next year; the difference is the price of waiting one year.
- Choose sex as underwritten. Insurers in most United States jurisdictions use sex-distinct mortality, and female death probabilities are materially lower at every adult age.
- Answer the tobacco question honestly. Any nicotine in the last 12 months normally means tobacco rates, and this model multiplies every annual death probability by 2.5 when you say yes.
- Pick the underwriting class you would realistically be offered. Preferred Plus is roughly the healthiest 10% of applicants; Standard is the honest default; the Table ratings are what an impaired risk is offered instead of a decline.
- Set the coverage amount and the term length. Coverage is the death benefit in dollars; the term is how many level-premium years you want. Longer terms cost more per year because more of the term sits at older, dearer ages.
- Adjust the pricing interest rate if you want to see how the insurer's assumed investment return moves the price. A higher rate discounts future claims harder and lowers the premium.
- Press Estimate Premium and read the breakdown: net premium, expenses, gross annual, monthly, cost per $1,000, and the probability of dying inside the term. The chart under the result reprices the same policy at every issue age from 25 to 70.
The mortality-table premium formula, step by step
Start with the published annual death probability for your sex at each attained age, then bend it three ways. A class factor reflects how the underwriter graded you, a tobacco factor of 2.5 applies if you use nicotine, and a selection factor reflects that a freshly underwritten life is far healthier than the general population and that this advantage wears off over about 25 years:
with the selection factor grading linearly from 8% of population mortality in the first policy year to 60% after the twenty-fifth:
Survival to the start of policy year is the running product of the yearly survival probabilities, and money one year away is worth today. The net single premium per dollar of death benefit is the discounted expected claim, paid at the end of the year of death:
Premiums, however, are not paid once; they are paid at the start of every year the insured is alive. The value of one dollar a year for the term is the temporary life annuity-due:
Setting the value of the premiums equal to the value of the claims, the equivalence principle gives the net level annual premium for a death benefit , and a proportional expense load plus a flat annual policy fee turn it into the gross premium that actually appears on a bill:
This calculator uses and dollars, and multiplies the annual figure by 1.08 before dividing by twelve to show a monthly cost, because monthly billing is genuinely dearer than annual billing.
Underwriting classes and what actually moves you between them
The class factor is the single largest thing you can influence. It is not a discount on a list price; it is a direct multiplier on your assumed death rate, so a Preferred Plus applicant is priced as though they were a materially different person from a Standard one. Underwriters reach the class by adding up debits for build, blood pressure, cholesterol ratio, family history of early cardiovascular disease or cancer, driving record, hazardous avocations and nicotine, then reading the total off a grid. The table below shows both the multipliers this calculator applies and the debit grid the Underwriting Desk game on this page uses, which is a simplified but faithful version of the real process.
| Class | Multiplier on death rate | Debit total in the desk game | Typical profile |
|---|---|---|---|
| Preferred Plus | 0.55 | 0 | Ideal build, no nicotine ever, no early family history, clean labs and driving record |
| Preferred | 0.75 | 1 to 2 | Very good health with one minor debit, such as a former smoker or a slightly high build |
| Standard | 1.00 | 3 to 6 | Average insured life; also where a current tobacco user with nothing else lands |
| Substandard Table 2 | 1.50 | 7 to 12 | A rated impairment such as obesity plus family history |
| Substandard Table 4 | 2.00 | Not offered in the game | Heavier rating, often several stacked impairments |
| Decline | No policy issued | 13 or more, or expiry past age 85 | Risk outside the carrier's appetite at any price |
Tobacco use is handled separately from the class, exactly as carriers do it: a current tobacco user can still be graded Standard, but every death probability in the calculation is multiplied by 2.5 on top of the class factor. Most carriers will re-underwrite you into non-tobacco rates after 12 consecutive tobacco-free months, which is usually the single most valuable financial decision available to a smoker.
Worked example: a 40-year-old preferred applicant buying $500,000
Take a 40-year-old man, preferred class, no tobacco, $500,000 of death benefit, a 20-year term, priced at 4%. The Social Security table gives a first-year population death probability of . Multiply by the preferred class factor 0.75 and the first-year selection factor 0.08 and the pricing rate for policy year one is 0.000187, or 0.187 deaths per thousand, which is roughly what a select insured-lives table shows at that age. Repeating that for all 20 years and discounting produces a net single premium of 0.015500 per dollar of benefit and an annuity-due factor of 14.052. The net level annual premium is therefore 500,000 Ć 0.015500 Ć· 14.052 = $551.51. Dividing by 0.80 for expenses and adding the $60 policy fee gives a gross annual premium of $749.39, about $67.44 a month billed monthly, or $14,988 paid in over the full 20 years. The chance this applicant dies inside the term is 2.71%, so the policy is overwhelmingly likely to expire unused, which is exactly what a term policy is supposed to do.
Now change one input at a time. Moving the same man to Preferred Plus drops the annual premium to about $565, while Standard raises it to about $960. Ticking the tobacco box raises the preferred figure to roughly $1,760. Waiting ten years and buying at 50 instead of 40 costs about $1,499 a year, almost exactly double, and that gap never closes because the policy is priced from the age at issue, not your age today.
What a $500,000, 20-year policy costs at different ages
Every figure below is the gross annual premium this calculator returns for a $500,000 death benefit over a 20-year level term at a 4% pricing rate. Read down a column to see the cost of waiting; read across a row to see what underwriting and tobacco are worth.
| Age at issue | Male, Preferred Plus | Male, Standard | Male, Standard tobacco | Female, Standard | Female, Standard tobacco |
|---|---|---|---|---|---|
| 25 | $285 | $469 | $1,077 | $261 | $560 |
| 35 | $423 | $719 | $1,695 | $436 | $996 |
| 45 | $793 | $1,386 | $3,321 | $869 | $2,062 |
| 55 | $1,575 | $2,788 | $6,657 | $1,827 | $4,381 |
| 65 | $3,530 | $6,209 | $14,196 | $4,573 | $10,637 |
Notice that the male tobacco column at 45 costs more than the male Preferred Plus column at 65. Nicotine is worth about twenty years of age in this model, which is the same conclusion published insured-lives studies reach.
Why the interest rate and the term length matter
Two inputs are easy to overlook. The pricing interest rate is the return the insurer assumes it earns on premiums held before claims are paid. Because claims land later than premiums, a higher assumed rate discounts them harder and lowers the premium; dropping the rate from 4% to 2% raises the worked example above by roughly a tenth. Real carriers reprice term products when long bond yields move for exactly this reason.
The term length matters more than it looks, because a level premium is an average over the whole term. A 10-year term for the 40-year-old above averages the death rates of ages 40 to 49; a 30-year term averages ages 40 to 69, and the last decade of that is dramatically dearer. That is why the premium roughly doubles from a 10-year to a 30-year term even though the death benefit is unchanged, and why laddering, buying a large short policy alongside a smaller long one, is often cheaper than one long policy sized for the earliest years.
Limitations and assumptions behind this rate model
The most important limitation is the mortality basis. The Social Security period life table describes the whole United States population, including people no insurer would issue to; insured-lives mortality is far lighter. The selection factor corrects for that, but it is a smooth linear approximation to a select-and-ultimate table with hundreds of cells, so individual results can be a third away from a real quote in either direction. The model also assumes premiums are paid at the start of each year and claims at the end of the year of death, ignores lapse-supported pricing (which lets real term products charge less than pure mortality cost suggests), ignores reinsurance and reserving requirements, ignores state premium taxes, and applies one flat expense load at every policy size when in reality large policies carry proportionally lower expenses. It prices level term only, not whole life, universal life, indexed universal life, annual renewable term, return-of-premium riders or group coverage. Sex-distinct pricing is used, which is not permitted in some jurisdictions. Finally, nothing here performs underwriting: the class you choose is an input, not a finding, and only a carrier can tell you which class you will actually be offered.
Sources and mortality data behind this calculator
Every constant in the model is either a published figure with a citation below or a clearly labelled modelling assumption. The death probabilities were taken directly from the Social Security Administration's published table rather than a secondary summary.
- United States Social Security Administration, Office of the Chief Actuary, Actuarial Life Table, period life table ā official table of annual death probabilities by age and sex. This supplies every base value in the calculator for ages 18 through 100.
- Society of Actuaries, 2015 Valuation Basic Tables (VBT) report and tables ā the industry select-and-ultimate insured-lives basis. The 25-year select period and the shape of the selection factor used here are taken from that structure; the calculator does not reproduce the VBT rates themselves.
- United States Department of Health and Human Services, The Health Consequences of Smoking ā 50 Years of Progress: A Report of the Surgeon General (2014) ā the source for the roughly two-to-three-times all-cause mortality ratio that justifies the 2.5 tobacco multiplier.
- National Association of Insurance Commissioners, consumer guidance on life insurance ā plain-language background on policy types, underwriting classes, free-look periods and how to compare offers.
- Society of Actuaries, Long-Term Actuarial Mathematics notation and terminology ā the standard notation for the net single premium and temporary life annuity-due used in the formula section above.
The class multipliers (0.55, 0.75, 1.00, 1.50, 2.00), the selection factor endpoints (8% and 60%), the 20% expense load, the $60 policy fee and the 1.08 monthly modal factor are modelling assumptions chosen so that the output lands in the observed range of United States street rates. They are not filed rates and no carrier endorses them.
Term life pricing questions shoppers ask
How much does a $500,000 20-year term policy cost?
For a 40-year-old man in the preferred non-tobacco class this model returns about $749 a year, roughly $67 a month when billed monthly, using the SSA 2023 male death probabilities, a 4% pricing interest rate, a 20% expense load and a $60 policy fee. The same applicant at 50 pays almost exactly double, and adding tobacco use roughly triples the figure.
Why does tobacco use multiply the premium so heavily?
Tobacco is applied as a mortality multiplier, not a flat surcharge: every annual death probability in the calculation is multiplied by 2.5 before anything is discounted, so the effect compounds across the whole term. That is consistent with the roughly two-to-three-times all-cause death rate the Surgeon General reports for cigarette smokers. Most carriers re-rate you as a non-tobacco risk after 12 consecutive tobacco-free months, which is why the question is worded that way.
What is the difference between the net premium and what I would actually pay?
The net premium is the discounted expected cost of claims and nothing else. The gross premium adds the insurer's expenses, commissions and profit margin: this model divides the net premium by 0.80 and adds a $60 annual policy fee. Paying monthly instead of annually costs about 8% more because the insurer loses investment income on the unpaid balance and absorbs more billing expense.
How accurate is a premium built from a population life table?
Typically within about a third of street rates for healthy applicants, and closer at older ages. Population mortality is far heavier than insured-lives mortality, so the model corrects it with an underwriting selection factor that starts at 8% of the population rate in the first policy year and grades up to 60% over 25 years. That reproduces the shape of insured experience without copying any single carrier's filed rate card.
Which underwriting class should I select?
Pick the class an underwriter would actually assign, not the one you hope for. Preferred Plus normally demands an ideal build, clean labs and blood pressure, no tobacco, no family history of early cardiovascular disease or cancer, and a clean driving record. Standard is the honest default for most applicants. If you are unsure, price Standard and Preferred side by side to see exactly what the better class is worth.
Is this an actual life insurance quote?
No. It is an educational estimate built from a public population mortality table, so it cannot see your medical records, prescription history, driving record, occupation or hobbies. Real carriers price from their own insured-lives experience, reprice frequently, and make the final class assignment only after underwriting. Treat the output as a planning figure and get quotes from licensed insurers.
Mortality basis: SSA period life table. Underwriting and consumer background: NAIC life insurance guidance. Select-period structure: SOA 2015 Valuation Basic Tables. Class multipliers, expense load and policy fee are labelled modelling assumptions, not carrier filings.
Underwriting Desk: classify the file, price the risk
This is the calculator's own mortality math played as a job. Applicant files slide onto the desk one at a time showing age, sex, tobacco use, BMI, family history, coverage requested and term. A logarithmic mortality curve sits beside the file, split into bands, one per risk class; the highlighted band shows exactly which death-rate multiplier you are about to charge. Move the selector, commit the file, and the desk reveals the true class an underwriter would assign along with the annual premium the calculator computes for it. Under-class an applicant and you collect less premium than the risk costs, so the book's loss ratio climbs. Over-class them and the applicant walks to a competitor. Clear the file quota with the loss ratio under the limit to move up a level.
Level 1
File 0 / 8
Bound 0
Lost 0
Loss ratio ā
Ratio limit 95%
Score 0
Best 0
Press Start shift, then use the arrow keys or tap a class tray to classify each applicant file.
Keyboard (focus the desk first): ā ā move the class selector, ā ā also work, 1-5 jump straight to a class, Enter or Space commits the file and advances the verdict, R restarts the level. Pointer and touch: drag across the mortality bands to aim, tap a class tray to commit, tap the verdict to advance.
- Preferred Plus - 0.55x death rate, 0 debits
- Preferred - 0.75x, 1 to 2 debits
- Standard - 1.00x, 3 to 6 debits
- Substandard Table 2 - 1.50x, 7 to 12 debits
- Decline - 13 or more debits, or expiry past age 85