How does life insurance work, and how much do you need?
Life insurance is a contract where you pay premiums to an insurer, and in exchange, the insurer pays a death benefit to your named beneficiaries if you die during the policy’s term. It exists to protect the people who depend on your income — a spouse, kids, or anyone else who relies on you financially — from a sudden loss of that income. Term life insurance, the most common and affordable type, is more straightforward than it might seem, and figuring out how much coverage you need is a matter of a few inputs, not guesswork.
What is life insurance?
The mechanics are simple: you apply for coverage, the insurer sets a premium based on your risk profile, and as long as you keep paying that premium, the policy stays active for its term. If you die during that term, the insurer pays the death benefit to whoever you named as beneficiary.
Here’s how that plays out in practice. Say Alex is an attorney with a husband and two kids, ages 5 and 10, who depend on her income. She applies for a policy with a $900,000 death benefit, and the insurer sets her premium at $50 a month for a 20-year term. Years later, Alex is killed in a car accident. The insurer pays her husband the $900,000 death benefit, which he uses to cover her medical bills, the funeral, the remaining mortgage and other debts, a college fund for the kids, and additional training so he can become the family’s primary earner.
Without that policy, her husband would have had to cover all of those costs out of pocket — medical bills, funeral expenses, the mortgage, everything — with no support from a death benefit. In practice, situations like that often push surviving family members into significant debt or even bankruptcy.
Do I need life insurance, and how much?
If Alex’s situation sounds at all like yours, you likely stand to benefit from a policy. Outside of being independently wealthy or having no one financially dependent on you, life insurance is worth seriously considering. The harder question is usually how much coverage is enough — and while every family’s situation is different, there’s a straightforward formula that gets you a reasonable estimate.
A simple formula for your life insurance need
Add up the following:
- Half of your annual household income
- 3x your current personal income
- $250,000 per child under 21, pro-rated by age*
- Total debts and liabilities (mortgage, auto loans, credit cards, and so on)
Then subtract your liquid assets — non-retirement accounts, your emergency fund, and bank balances.
The result is your estimated life insurance need.
* This number depends on how much of your household income you’re responsible for. If you cover 75% or more of household income, use $250,000 per child. If you cover 50–75%, use $200,000. If you cover 25–50%, use $150,000. If you cover less than 25%, use $100,000.
If you already have a policy, subtract your existing coverage from this number to find your coverage gap — the additional amount you’d need to close it.
Working through the formula with Alex’s numbers
Let’s apply the formula to Alex’s situation. She and her husband have a household income of $80,000, of which Alex’s $50,000 salary makes up 63%. Their home is worth $500,000 with $450,000 left on the mortgage; their car is worth $20,000 with $13,000 owed. They have $50,000 in liquid investments and cash, and two kids, ages 5 and 10.
- Half of household income: $40,000
- 3x Alex’s personal income: $150,000
- Per-child amount (pro-rated, using $200,000 since Alex covers 63% of household income): $257,143
- Total debts and liabilities ($450,000 + $13,000): $463,000
- Minus liquid assets: −$50,000
Total: $860,143, rounded up to the nearest $50,000 → $900,000 — which is exactly the coverage amount in the example above.
This calculation isn’t complicated once you have the inputs, but it does require pulling together your income, debts, and liquid assets in one place — which is a big part of why it’s worth doing as part of a broader look at your finances rather than in isolation.
What kind of life insurance is right for me?
For most people, term life insurance is the right starting point. It’s the easiest to understand, the simplest to apply for, and generally the most affordable option, since you’re paying purely for coverage over a defined period rather than building any cash value.
As your financial situation gets more complex, you may look into permanent life insurance — indexed universal life or whole life, for example — or riders that add benefits like accidental death, disability, waiver of premium, or long-term care coverage, usually at additional cost. These products can make sense in specific situations, but they’re also where sales commissions can distort the advice you get. If you’re considering anything beyond basic term coverage, work with someone whose incentives are aligned with your actual needs, not just the size of the policy they sell you.
How do I get life insurance?
Getting term life insurance used to mean finding an agent, filling out a lengthy paper application, sitting for a medical exam, and waiting weeks for a quote. That process has gotten dramatically simpler. These days, you can typically get quotes online in minutes, and in many cases apply and bind coverage without a medical exam at all. Comparing a few quotes before you commit is worth the extra ten minutes it takes.
If your situation is more complex — multiple dependents, a business, significant assets — working with a financial advisor or insurance agent to sort through your options directly is often worth the cost of their time.
Moving forward with life insurance
Used correctly, life insurance is a straightforward way to protect the people who depend on you from a real financial shock. With a working formula for how much coverage you need and a basic understanding of term versus permanent policies, you have what you need to get a quote, compare it against your actual coverage gap, and make a decision — rather than putting it off because it feels complicated.