Human Life Value: the present value of future contribution.

The formula

Human Life Value is the present value of the working insured’s future contribution to the household. The standard formulation:

HLV = Σ_t=1ⁿ [I · (1 − c) / (1 + r)^t]

Where I is annual gross income, c is the fraction the insured consumes themselves (personal consumption ratio, typically 25–35 %), n is years remaining to retirement, and r is a real (inflation-adjusted) discount rate. The output is a single dollar figure: the lump sum that, invested at rate r and drawn down over n years, would replace the insured’s contribution to the household.

The formula traces to Solomon S. Huebner, Wharton School professor of insurance, whose 1927 work The Economics of Life Insurance introduced HLV as the rigorous foundation for needs analysis. It remains the framework used in most actuarial-society practice notes and the more sophisticated CFP Board materials.

Personal consumption: the c parameter

The personal-consumption ratio is the fraction of household income the insured consumes themselves rather than transferring to dependents. The estimate matters because HLV measures the dependent-facing contribution, not the gross income figure.

Working ranges:

• Single insured with no dependents: c = 1.0 (everything is personal consumption); HLV is zero. No life-insurance need on the human-life-value basis.
• Married, no children, dual income: c ≈ 50 %. Each spouse consumes roughly half the household’s consumption.
• Married, two children, single primary earner: c ≈ 25–30 %. Primary earner’s personal consumption is a smaller fraction of the household’s spending.
• Married, multiple children, single earner: c ≈ 20–25 %. Even smaller personal share as more dependents draw on the household budget.

Calibration heuristic: roughly speaking, c is approximately 1 / (number of household members + 0.5), with the +0.5 reflecting that adults consume slightly more per capita than children. A household of two adults and two children: c ≈ 1 / 4.5 = 22 %. This is a rule of thumb, not a derivation; better data comes from the household’s actual budget if you track spending categorically.

The discount rate: why real rates and not nominal

The discount rate r in the HLV formula should be a real (inflation-adjusted) rate, not a nominal rate. The reason: the income stream I is implicitly indexed to inflation (real wages tend to track productivity and real returns over the long run, with cyclical variation). Discounting an inflation-tracking income stream by a nominal rate would double-count inflation.

Working real-rate ranges:

• 2 %: conservative, appropriate for households planning to invest the death benefit in low-volatility cash and bond instruments.
• 3 %: standard, appropriate for households planning balanced 50/50 investment of the death benefit.
• 4 %: aggressive, appropriate for households planning equity-tilted long-horizon investment of the death benefit.

Higher discount rates produce smaller HLV figures: future income is discounted more steeply, so the present value of the stream is lower, so the needed lump sum is smaller. The conservative practice is r = 2–3 % for most households.

Worked example: 32-year-old primary earner, two young children

Insured: age 32, gross annual income $95,000, retirement age 65 (n = 33 years). Spouse age 30 with $58,000 income (lower than insured’s, so insured is the primary earner). Two children ages 4 and 1.

Personal consumption: 25 % (single primary earner of a 4-person household). Discount rate: 3 %.

Annual contribution to dependents: $95,000 × 0.75 = $71,250.

HLV = $71,250 × [(1 − 1.03⁻³³) / 0.03] = $71,250 × 20.39 = $1,452,800.

Compare to the DIME result for the same household ($1,613,000 in the worked example on the DIME page). The two methods give answers within 10 % of each other, suggesting a robust coverage figure of approximately $1.5 million for this household.

Worked example: 56-year-old empty-nester

Insured: age 56, gross annual income $145,000, retirement age 65 (n = 9 years). Spouse age 54. Children adult and independent.

Personal consumption: 50 % (childless household; insured consumes roughly half). Discount rate: 3 %.

Annual contribution to dependents (the surviving spouse): $145,000 × 0.50 = $72,500.

HLV = $72,500 × [(1 − 1.03⁻⁹) / 0.03] = $72,500 × 7.79 = $565,000.

Compare to the DIME result for this household ($810,000). HLV produces a meaningfully lower figure for the older insured, because the working life remaining (9 years) is short and the discount mechanic compresses the stream. Both methods are defensible; the practitioner judgment is whether to insure for the higher (DIME-style obligation coverage including immediate mortgage payoff) or the lower (HLV-style income replacement at present value). Most empty-nester households split the difference, sizing coverage between the two figures.

HLV vs DIME: which to use when

For most working-age primary earners with dependents and stable income, HLV and DIME produce similar coverage figures because the obligations they capture overlap heavily. Where they diverge:

• HLV is structurally larger when the income-replacement need is long (many years to retirement) and obligations are relatively small. Younger insureds with modest mortgages and few children fall here.
• DIME is structurally larger when there are large discrete obligations (substantial mortgage, multiple children with private-college aspirations) and the income-replacement years are conservatively short. Mid-career insureds with significant household debt and young children fall here.

Run both. Treat the higher of the two as the conservative coverage figure and the lower as the floor. Most households end up sizing their term policy between the two figures, often closer to the higher one because over-coverage on level-premium term is much cheaper than under-coverage in the event of claim.

The growing-income variant

The standard HLV formula assumes constant real income over the working life. A more accurate variant assumes income growth over the career, typically 1–2 % per year in real terms, peaking in late career and flattening thereafter. The growing-income HLV is:

HLV_growing = I·(1−c) · [1 − ((1+g)/(1+r))ⁿ] / (r − g)

Where g is the real income growth rate. For young primary earners with substantial career growth ahead, this variant produces meaningfully larger coverage figures — appropriate when the working insured is on a clear upward trajectory and the household standard of living would adjust to higher income over the career. The calculator on this site uses the constant-income standard form; for the growing-income variant, run the calculation manually or work with a financial planner.