Summary: Most people need disability benefits covering 50 to 70 percent of gross income, which for most households replaces close to 100 percent of after-tax spending. The right number comes from your essential monthly expenses plus a margin, coordinated with any employer group coverage. This guide walks through the expense-based calculation, the rules of thumb, and the coordination traps that leave people over- or under-insured.
Disability insurance has no single right number, but it has a wrong range: too little leaves essentials uncovered, too much wastes premium on benefits insurers will not even sell you. Insurers cap total coverage around 60 to 70 percent of income precisely because higher replacement would create incentives not to recover.
The method below gets you to your number in about fifteen minutes with a bank statement and a pay stub.
Two-earner households can usually insure less than single earners, but not half as much. If each spouse covers half the essentials, the disabled spouse's benefit needs to replace their half plus a margin, because the working spouse's income continues. A common target: each spouse carries enough to cover 60 percent of their own contribution to shared expenses.
The trap is correlated risk: couples in the same industry or the same small business can both lose income to the same event. Business partners who are also spouses should consider the household's total exposure, not just each person's number in isolation.
List the monthly spending that continues if you cannot work: housing, food, utilities, insurance premiums, transportation, debt minimums, child care, and medical costs. Exclude savings contributions and discretionary spending you would cut. For most households the essential total lands at 60 to 75 percent of take-home pay.
This is your floor: the monthly benefit must cover this number. Disability benefits are often received income-tax-free when you pay premiums with after-tax dollars, which is why a 60 percent gross benefit can replace nearly all of essential spending. Do the expense math rather than guessing from income.
The industry rule of thumb is 60 percent of gross income, and it fits most W-2 employees because benefits replace after-tax spending closely. Break it upward toward 70 percent if you are the sole earner with high fixed costs like a mortgage, or if you live in a high-tax state where the tax-free benefit advantage is smaller.
Break it downward if you have substantial passive income, a working spouse covering half the essentials, or large liquid savings that cover the elimination period and beyond. The goal is covering essentials with margin, not replicating the paycheck.
Most employers offer group long-term disability, typically 50 to 60 percent of base salary up to a monthly cap like $5,000 or $10,000. Get your group certificate and read three numbers: the benefit percent, the monthly cap, and whether bonuses and commissions count as covered earnings.
The gap between the group benefit and your expense floor is what individual coverage should fill. If group pays 60 percent to a $5,000 cap and you earn $150,000, group covers $5,000 of the $7,500 you need, and individual coverage should target the $2,500 gap. Buying individual coverage without measuring the group plan is how people end up double-covered or still short.
Your benefit amount must pair with an elimination period your savings can actually bridge. A 90-day elimination period is standard; with a $6,000 monthly essential spend, you need $18,000 in accessible savings plus a margin to reach the first check. Shorter elimination periods cost much more in premium and rarely make sense if you have the savings.
Short-term disability, often employer-provided, can bridge part of the gap: many STD plans pay for 3 to 6 months. If you have STD, a 180-day LTD elimination period becomes viable and cuts the LTD premium meaningfully. Map the sequence: sick days, then STD, then LTD.
Business owners need to insure correctly-defined income: insurers look at W-2 wages plus provable business income, and the definition matters enormously for S-corp owners who minimize salary. Document K-1 income and get the insurer's earnings definition in writing before applying.
High earners hit benefit caps: individual policies commonly max at $15,000 to $20,000 a month, and group caps are lower. Above that, layering multiple individual policies or Lloyd's-style excess coverage fills the gap, at increasing cost per dollar. Price the layers separately.
Income changes, mortgages get paid down, children leave, and spouses' earnings shift. A benefit amount that was right at 35 can be wrong at 45 in either direction. Most individual policies offer future increase options that let you raise coverage without new underwriting; exercise them on schedule.
The five-minute version of the review: are essential expenses still covered by total benefits, and is the premium still under 3 percent of income. If both answers are yes, you are done until next time. Put the review on the same calendar cycle as your life insurance checkup; the two numbers move for the same life reasons.
50% to 70% of gross income for most people, which typically replaces close to 100% of essential after-tax spending since benefits are often tax-free.
For most W-2 employees, yes: 60% of gross income closely replaces essential spending. Sole earners with high fixed costs may want 70%.
Yes, and you should coordinate them: individual coverage fills the gap between the group benefit (and its cap) and your expense floor.
Total your essential monthly expenses, subtract other income that continues during disability, and target a benefit covering the remainder with margin.
Benefit ranges per industry practice; SSDI figures per SSA. This guide is for planning only.