Most people answer “how much life insurance do I need” with a number that sounds right rather than a number that’s right. The actual question is narrower and more useful: if you were gone tomorrow, what does your family need to not be financially destabilized? That answer is calculable, and it’s almost never the round number you’d guess.
This guide walks through three ways to size a policy — from quickest to most rigorous — and the honest framing for which one to use.
The 10x rule (fast, rough, often wrong)
The classic shortcut is 10x your annual income. Make $90,000 a year, buy $900,000 of coverage.
The appeal is obvious: it takes ten seconds. And for a single earner with grown kids and a paid-off house, 10x income gets close enough.
The problem is what it misses. A 32-year-old earning $90,000 with two kids under five, a 28-year mortgage, and a non-working spouse needs more than $900,000 — that policy covers roughly a decade of income, but the youngest kid won’t be financially independent for two decades. Conversely, a 58-year-old earning $200,000 with a paid-off house and adult kids might not need $2 million of coverage at all.
10x is a sanity check. Use it as the floor, then look harder.
The DIME method (the better starting point)
DIME is the calculation most independent agents reach for. It stands for:
- D — Debt: All non-mortgage debts. Credit cards, car loans, student loans, medical balances. Your family should be able to wipe these clean.
- I — Income: The income your family needs replaced, multiplied by the number of years they’d need it replaced. Often this is “until the youngest kid graduates college” or “until my spouse hits full retirement age.”
- M — Mortgage: The current balance on the home. Not the original loan — the current payoff number.
- E — Education: Estimated cost of college for each dependent kid. Public in-state for an Arizona kid runs around $120,000–$140,000 all-in by current trajectories; private is meaningfully higher.
Add it up. That’s your DIME number. For a typical Arizona family of four with a 30-year-old breadwinner, DIME usually lands somewhere between $800,000 and $2 million.
What DIME captures that 10x misses: it scales the income-replacement years to your actual situation. A 28-year-old with a newborn needs 25+ years of income replacement. A 50-year-old with a college-bound senior needs 4. Same income, very different policies.
The “what would they actually need” method (the real one)
DIME is a calculation. The real question is a story: if you died tomorrow, walk through what your family does next.
- Where do they live? Can the surviving spouse keep the house or do they need to sell?
- Does your spouse work? If not, do they go back to work? In what field? Earning what?
- Who watches the kids during the workday? Is there a childcare cost that didn’t exist before?
- What do you do for your family that isn’t priced into income — meal prep, taxi service to school, home maintenance, the mental load? Those have a replacement cost too.
- Are there one-time expenses — funeral costs, attorney fees to settle the estate, moving expenses if the family relocates near grandparents?
This conversation is uncomfortable and it’s the one that produces the right number. The dollar figure that pops out of it is sometimes lower than DIME (because the surviving spouse genuinely can return to a strong income quickly) and sometimes higher (because the family wants the option for the surviving parent to stay home with young kids for several years before returning to work).
A simple framework for laddering
Most families’ need for coverage isn’t flat across time — it spikes in the years with young kids and a mortgage, then tapers as kids leave home and the loan gets paid down. A laddered policy structure matches that curve.
A common Arizona-family setup looks something like:
- A 30-year base layer sized to cover the long-tail obligations: mortgage payoff, replacement income through the youngest kid’s college years.
- A 15- or 20-year top layer sized to cover the high-need years — kids at home, both parents commuting, the mortgage still mostly outstanding.
The top layer falls off when the high-need window closes. The base layer carries you through the long horizon at a lower total premium than a single big policy would cost.
You can also blend term and a small permanent policy if there’s a longer-term reason for coverage (special-needs child, estate planning, business succession), but that’s a separate conversation — for most buyers, the answer is term layered to the curve.
A quick Arizona-specific note
Cost of living in the Phoenix metro has moved meaningfully over the last decade, and the gap between Maricopa County and the rest of the state has widened. If you’re sizing a policy using a national-average DIME calculator, the housing and childcare line items are probably under-stated for the Valley and over-stated for smaller markets like Yuma or Sierra Vista. Plug in your actual mortgage balance and your actual childcare quote; don’t trust a generic number. Arizona doesn’t levy estate or inheritance tax, which simplifies the planning for most families — you don’t need to manufacture death-benefit liquidity to settle a state-level tax bill. That’s a meaningful difference from some other states and one less thing to size around when you’re picking a coverage amount.
When the right answer is “less than you think”
A few situations where the standard advice oversells you:
- Dual-high-income couple, no kids, no shared mortgage. Each spouse’s income could disappear and the other would be fine. Modest coverage is sufficient — enough to clean up debts and bury the deceased.
- Late-career, paid-off house, grown kids. The financial obligations the insurance was protecting are already cleared. A small final-expense policy may be all that’s actually needed.
- Adequate self-insurance. If you have $3 million in liquid net worth and no dependents, you don’t need a million-dollar policy. You are the policy.
A good agent will tell you when you’re shopping for more coverage than you need. If the agent only sells in one direction (always more), that’s data about the agent.
When the right answer is more than you think
And the inverse:
- Single earner, young kids, non-working spouse, big mortgage. This is the textbook high-need scenario. The DIME number often shocks people. Buy the coverage anyway — term is cheap when you’re young and healthy, and the policy is doing real work.
- Business owner with a partner. You may need separate buy-sell coverage on top of personal life insurance. Talk to your accountant about how the entity is structured before sizing the policy.
- Stay-at-home parent. The non-working spouse needs coverage too. The cost to replace what they do — childcare, household management, the second pair of hands — is real money, even if no paycheck reflects it.
Bottom line
- 10x income is a sanity check, not an answer.
- DIME gets you to a defensible number quickly and is the right starting point for most buyers.
- The “what would they actually need” conversation is the one that produces the policy you’ll be glad you bought.
- Ladder the coverage to match how your obligations actually change over time — most families don’t need a flat death benefit for 30 years.
Want help running the numbers for your situation? Call (480) 322-7400 or request a quote on the contact page. We’ll walk through DIME with you and pull illustrations against a defensible coverage amount, not a number we made up to make the policy look impressive.