How Much Life Insurance Do You Actually Need?

I was sitting at my kitchen table with three quotes open and none of them made sense

I had a mug of coffee going cold and a life insurance quote tab that kept screaming a big coverage number at me, and I’m sitting there thinking… do I actually need that, or is this just the internet doing internet things?

I’d already done the “pick a round number that feels adult” move. You know the one: 250,000… 500,000… 1,000,000 if you’re feeling ambitious. And then I started reading the policy language (which is a weird hobby, I know), and I realized the only way to feel sane about this is to do the math in plain English and make the coverage number earn its keep.

So that’s what this is: how to figure out how much life insurance you actually need, without pretending you’re a spreadsheet wizard.

And yes, we’re going to use numbers.

The question you’re really asking: “What problem is this money solving?”

Life insurance isn’t for you. You’ll be… unavailable. It’s for the people who’d be left holding the bag: the mortgage, the rent, the daycare bill that shows up like clockwork, the student loans (sometimes), the whole mess.

So before you chase a coverage amount, you pick the job you want the policy to do. For most people it’s one (or a mix) of these:

• Replace income for a while so your family doesn’t have to instantly downshift their whole life.
• Pay off big debts (mortgage is the usual suspect).
• Cover final expenses and the random costs nobody wants to talk about.
• Fund kids’ care / education (not required, but it’s common).
• Leave a buffer so the survivor isn’t making panicked decisions in month three.

And if you don’t have dependents and nobody relies on your income? You might not need much at all beyond funeral/final expenses and maybe debt cleanup. That’s not me being dramatic — that’s literally the point of the product.

But if you’ve got people depending on you, the “just pick 10x your income” shortcut can land in the ballpark… or it can be wildly off.

The math I actually trust (because it matches real life)

I’m a fan of a simple equation: add up what your family would need, subtract what they already have. That’s it. No mysticism. No “because that’s what most people do.”

Now, the part that trips people up is “income replacement.” Because replacing income forever is expensive, and replacing it for a reasonable window is usually enough.

So you pick a time horizon. Common ones I see people use: 10 years, 15 years, until the youngest kid hits 18, until the mortgage would be paid off, or “until my partner could realistically stabilize.” There’s no single correct answer — but you do need an answer.

Here’s a worked example with real-ish numbers so it doesn’t feel like a finance textbook.

A worked example (so you can copy it)

Say you’re 35. Two kids. Partner works part-time. You want the policy to cover the mortgage and keep the household running for 12 years.

• Annual income needed to replace: about 70,000 (not gross, more like what the household actually needs)
• Years to replace: 12
• Mortgage balance: 260,000
• Other debts you want gone: 18,000
• Childcare/education goal: 60,000 (a buffer, not a full ride fantasy)
• Final expenses: 15,000 (could be higher, could be lower)
• Existing savings/investments: 55,000
• Existing life insurance through work: 120,000 (and yes, I’d confirm it’s real and what happens if you change jobs)

Math:

1. Income replacement: 70,000 × 12 = 840,000
2. Debts: 260,000 + 18,000 = 278,000
3. Goals + final expenses: 60,000 + 15,000 = 75,000
4. Total need: 840,000 + 278,000 + 75,000 = 1,193,000
5. Subtract offsets: 55,000 + 120,000 = 175,000
6. Coverage target: 1,193,000 − 175,000 = 1,018,000

So you’re in the ballpark of about 1,000,000.

And notice what happened: we didn’t start with “1 million.” We earned our way there. That’s the whole vibe.

Also, you don’t have to buy the exact number. If 1,018,000 is the math answer, you might buy 1,000,000 or 1,100,000 depending on pricing tiers, underwriting class, and whether you want a little cushion. That cushion is not a sin.

That’s a lot of coverage! It is. But it’s also a lot of years of groceries, housing, and childcare. The number gets big fast when you translate “life” into “money.”

A quick table you can steal

This is the simple checklist I use when I’m sanity-checking a coverage amount.

One sentence that saved me from overthinking: coverage is for the gap.

The stuff that quietly changes the number (and why people get it wrong)

So why does everyone get this wrong? Because the inputs are squishy, and the sales pages pretend they aren’t. Honestly, the hardest part isn’t multiplying. It’s deciding what you’re trying to protect.

Here are the “gotchas” I see over and over:

1) You replace gross income instead of actual need.
Most households don’t need 100 percent of gross salary to keep moving. Taxes change, retirement contributions might stop, commuting costs might drop, and childcare might go up (because now one adult is doing everything). The number you want is the ongoing household shortfall — what your partner would be missing each year.

2) You forget time.
Replacing income for 30 years is one thing. Replacing it until kids are out of the house is another. If you’re buying term insurance, the term length is basically your time guess made official. Pick it on purpose.

3) You assume employer life insurance is permanent.
Sometimes it’s 1× salary, sometimes 2×, sometimes it’s optional, and sometimes it disappears the second you leave. I nodded like I understood this the first time. I didn’t. Check whether you can take it with you (portability) and what it costs if you do.

4) You ignore the survivor’s earning power.
This is touchy, because it’s personal. But if your partner would go from part-time to full-time in year two, that changes the income replacement need. If they wouldn’t (or couldn’t), that also changes it. You’re not judging anyone — you’re just doing the math.

5) You don’t leave a buffer for the messy year.
There’s always some excessiveness in the first year: time off work, travel, legal/admin stuff, maybe counseling, maybe moving. If the math says 980,000 and you buy 1,000,000, that’s not irrational. That’s you admitting life is not a clean spreadsheet.

But — and this matters — more coverage isn’t automatically better if it forces you to buy a policy you can’t keep. Lapse is the silent killer of “good intentions.”

And if you’re comparing term vs permanent (whole/universal), don’t let anyone blur the purpose. Term is usually the cleanest way to cover a big temporary risk (kids + mortgage years). Permanent can make sense for some estate planning situations or lifelong dependents, but it’s a different animal (and the policy details really, really matter).

Use calculators, but don’t hand them the steering wheel

I built ProCalc.ai because I got tired of calculators that hide the assumptions and act like they’re doing magic. You want tools that show the inputs, let you tweak them, and don’t shame you for not picking the “recommended” number.

Here are a few that help you triangulate the answer from different angles:

Play with the inputs. If your number swings by 400,000 just because you changed “years of income” from 10 to 15, that’s not the calculator being wrong — that’s it showing you what actually drives the decision.

And if you want a super practical strategy: run three scenarios.

• Lean: mortgage + 7 years income replacement + final expenses
• Middle: mortgage + 12 years + childcare buffer
• Sleep-at-night: middle + extra cushion (like 10 percent)

Then you shop pricing at those levels and see where the value is. Sometimes the jump from 750,000 to 1,000,000 costs less than you’d expect. Sometimes it’s the opposite. And it works!

FAQ

If you only take one thing from all this, take this: don’t buy a number because it sounds responsible. Buy a number because it matches a plan.

And if you’re stuck between two coverage options that are both affordable, I usually lean slightly higher — not because bigger is always better, but because life has a way of being… not tidy.

(Also, read the beneficiary section twice. Future-you will thank you.)