How much term life insurance do I actually need?

The three methods

DIME (Debt + Income × replacement years + Mortgage + Education) is the most common "professional" rule of thumb in financial planning. The 10–12× annual income multiplier shows up in LIMRA industry literature and most general-public financial-education content. Human Life Value (HLV) is the economically rigorous framework formalized by Solomon S. Huebner in The Economics of Life Insurance (1927) — the present value of expected future earnings net of self-consumption, discounted at a real (inflation-adjusted) rate.

A 35-year-old earning $150K with $30K in non-mortgage debt, a $400K mortgage, $100K in 529 funding goal across two kids, and $200K in existing liquid assets gets:

• DIME: $30K + ($150K × 10) + $400K + $200K = $2.13M
• 10× income: $1.5M
• HLV at 4% real discount, 30-year horizon, 30% self-consumption: ≈$1.83M

The spread is the insight. If three methods agree within 20%, the answer is roughly right. If they diverge by 50%+, dig into why before you buy the policy.

DIME — strengths and where it breaks

DIME's strength is concreteness. It anchors on real obligations: the loans you actually owe, the income you actually earn, the mortgage balance and education-funding goal. A surviving spouse can take the DIME number and trace each component to a line in the family's actual financial picture. That makes it easy to explain and easy to defend.

Where DIME breaks: it doesn't discount future income (10 years of $150K is treated as $1.5M, but $150K in year 10 is worth less in today's dollars), it doesn't net out existing liquid assets (so it over-counts when you have meaningful savings), and it doesn't adjust for the surviving spouse's earnings capacity (which materially reduces the income-replacement gap in dual-income households). Treat it as a floor, not a target.

10× income — useful sanity check, poor primary methodology

The 10–12× multiplier persists because it's memorable, fast, and roughly tracks the average across LIMRA's ownership data. It's a useful sanity check — if your DIME number and your 10× number are within 20% of each other, the math is probably in the right neighborhood.

Where it breaks: it ignores debt structure (a household with $1M of debt and a household with $0 of debt at the same income get the same answer, which is obviously wrong), and it ignores existing wealth (a $2M-net-worth family doesn't need the same coverage as a $0-net-worth family at the same income). Use it as a cross-check, not as the answer.

Human Life Value — the rigorous framework

Huebner's 1927 framework computes coverage need as the present value of expected future earnings net of self-consumption. The implementation:

HLV = Σ (annual_income × (1 - self_consumption_rate)) / (1 + r)^t

For t = 1 to remaining_working_years
Where r = real (inflation-adjusted) discount rate

The discount rate matters enormously — small changes (4% → 5%) can move the answer by 15–20%. The self-consumption rate (the share of income the deceased would have personally consumed and therefore doesn't need to be replaced for survivors) typically lands at 25–35%; lower for households with multiple dependents, higher for high-income earners with concentrated personal consumption. HLV is the most defensible answer when you're working with sophisticated counterparties (an estate attorney, a CPA structuring buy-sell coverage, a financial planner running long-horizon scenarios), and the most under-used answer in agent-led conversations because it tends to produce the highest face amounts and require the most explanation.

The tax answer: IRC §101

Per IRC §101(a)(1), life insurance death benefits paid by reason of death of the insured are excluded from the beneficiary's gross income for federal income tax purposes — the death benefit is not taxable income to the beneficiary. Important exceptions:

• Transfer-for-value rule (§101(a)(2)) — proceeds become taxable if the policy was sold to a third party for valuable consideration, with statutory exceptions for transfers to the insured, partners, partnerships, or corporations in which the insured is shareholder/officer.
• Employer-owned life insurance (§101(j)) — extra notice and consent rules apply to employer-owned policies on employees.
• Estate tax inclusion(§2042) — death benefits are included in the decedent's gross estate if the decedent held any incidents of ownership at death. Irrevocable Life Insurance Trust (ILIT) ownership is the standard structuring response for estate-tax-exposed households.

For most household-level coverage decisions, the §101(a)(1) exclusion is the only tax rule that matters. Estate planning becomes relevant only as you cross estate-tax thresholds — $13.99M federal in 2025 individual / $27.98M married, with state thresholds materially lower in some states.

Term length sizing

Match the term to the longest financial obligation the policy is designed to cover. If your youngest child becomes financially independent in 18 years and your mortgage matures in 25 years, a 20-year term is the wrong choice — buy 25 or 30. The marginal annual cost of extending term by 5 years is usually small compared to the catastrophic gap of being uninsured for the last 5 years of an obligation.

Why not whole life?

For pure death-benefit need against a finite obligation (raise kids to independence, pay off the mortgage), term is almost always the right answer — the cost-per-dollar-of-coverage is 5–15× cheaper than whole life at the same age. Whole life makes sense in narrower scenarios: estate-tax liquidity, business buy-sell funding, or specific permanent-dependent income-replacement strategies.

The producer incentive to sell whole life is enormous because first-year commissions are 5–10× higher than on comparable term coverage. This is one of the few places in personal finance where the producer's commission and the consumer's interest are sharply mis-aligned. Be aware of the asymmetry; ask whether the recommendation is term, whole, or universal, and ask why.

Run the numbers yourself

The Term Life Insurance Coverage Need Calculator implements all three methods side-by-side. Inputs include income, replacement years, debt, mortgage, education funding, existing assets, surviving-spouse earnings capacity, and the HLV discount rate (with sensitivity panel). Output is the spread between methods plus a recommended figure with reasoning.

Sources

• IRC §101 — Certain death benefits
• IRC §2042 — Proceeds of life insurance
• LIMRA industry research — life insurance ownership rates and average face amounts
• ACLI Life Insurers Fact Book (annual)
• Huebner, S.S. — The Economics of Life Insurance (1927) — foundational HLV methodology
• Life insurance methodology — full primary-source treatment