Net worth is the only number that matters

Income is famous because it's social. Salary comes up at dinner parties, on LinkedIn, in negotiation guides. Net worth is quiet, private, and the single most honest report card on your financial life. It's what's left when you stop confusing earning with keeping.

The math is two words long. Assets minus liabilities. Add up what you own. Subtract what you owe. The remainder is the actual you, financially.

Why income lies and net worth doesn't

Two people earning $120,000 can be in radically different places.

Person A has $90,000 in retirement accounts, $15,000 in a high-yield savings account, no debt, and rents. Net worth: $105,000.

Person B has $8,000 in retirement, $0 in savings, $22,000 in credit-card debt at 22% APR, a $48,000 car loan against a vehicle worth $32,000, and rents. Net worth: −$30,000.

Same income. Same dinner-party answer to "what do you do?" Different reality.

Net worth refuses to flatter. It doesn't care about your raise, your bonus, or your title. It only cares whether the gap between assets and liabilities is moving in the right direction.

How to calculate it

You need two columns.

Assets — what you own

• Cash in checking, savings, and money-market accounts.
• Brokerage account balances (taxable and tax-advantaged).
• Retirement accounts: 401(k), IRA, Roth, HSA, UK ISA, pension cash value.
• Real estate at conservative market value, minus estimated 5 to 7% selling costs.
• Vehicles at trade-in value, not retail.
• Cash-value life insurance, if applicable.
• Crypto at current market price (and only at the price someone will actually pay you).

Liabilities — what you owe

• Mortgage principal balance.
• Student loans.
• Car loans.
• Credit-card balances.
• Personal loans, HELOCs, medical debt, anything else with a payoff number.

Subtract the second column from the first. That's the number.

If the answer is uncomfortable, you've already done the most useful thing in personal finance: you've measured.

The conservative-valuation rule

The single biggest mistake we see in user-submitted net-worth calculations: optimistic asset valuation. Zillow says your house is worth $580,000; the most recent comparable sale on your block was $540,000; you've decided your house is worth $580,000.

It isn't. Or at least, you don't know that yet.

The conservative-valuation rule: when in doubt, undervalue assets and fully count liabilities. A net-worth statement that flatters you is useless. The one that's slightly pessimistic is the one you can plan from.

Tracking it is more important than maximizing it

The first time most people calculate their net worth, they get a number that feels wrong. Either disappointingly small or surprisingly negative. That's fine. The point isn't the snapshot. The point is the slope.

Start tracking it monthly. A spreadsheet works. A net-worth tool works better because it auto-updates investment balances. The format doesn't matter. The consistency does.

What you're looking for over time:

• Direction. Is the line going up over a rolling 12-month window? Markets bounce; your trend should still be positive across a year.
• Composition. Is the share coming from invested assets (compound) growing faster than the share from depreciating ones (cars, gadgets)?
• Liability decay. Are your debts shrinking on a fixed schedule, or are they getting refinanced into bigger balances?

The age benchmarks (loosely)

Personal-finance media loves rules of thumb here. They're loose, but useful as a sanity check.

• By age 30: net worth ≈ 0.5× your annual income.
• By age 40: 2× annual income.
• By age 50: 4× annual income.
• By age 60: 6× to 8×.
• At retirement: 8× to 10× the income you want to draw from it — equivalent to the 25× annual-expenses target behind the 4% safe withdrawal rule, which is what most FIRE calculators solve for.

If you're above these, you're tracking well. If you're below, you have either time or income to fix it. If you're well below and short on both, that's the moment to make the harder choices.

Forecasting the line forward

Knowing your net worth today is half the work. Knowing what it will look like in 10 years under your current trajectory is the other half. That's where forecasting earns its keep.

Plug in your current balances, your monthly contributions, your debt amortization schedules, and a real return assumption (5% for diversified equities is a defensible long-run assumption after inflation). Project ten years out. Now you can see whether your current behavior gets you to where you want to be — or whether something needs to change.

Most people who do this exercise once never stop doing it. The clarity is addictive in a quiet, useful way.