Net worth is calculated before taxes in almost every standard context. Whether net worth is calculated before or after taxes matters because the before-tax convention — used by banks, financial planners, the SEC, and most online calculators — ignores a tax bill that will eventually come due on much of what you own. The gap between the two figures can easily reach six figures for anyone with a large traditional 401(k) or heavily appreciated investments.
What the Standard Formula Actually Measures
Add up the market value of everything you own — home, investments, bank accounts, vehicles, business interests — and subtract everything you owe. That is your net worth under the conventional definition. Assets are valued at fair market value, roughly what a buyer would pay under normal conditions with no time pressure.
The calculation stays simple and lets you compare one person’s balance sheet to another’s. It also creates a blind spot. Two people with identical $2 million net worth statements can have very different spending power if one holds mostly Roth accounts and the other holds mostly traditional 401(k) money that has never been taxed. Your stock portfolio is worth whatever the market says today, not what you would keep after selling and paying capital gains tax.
Taxes You Already Owe Do Count
Before-tax net worth doesn’t mean tax is invisible. Taxes you already owe — even if you haven’t paid them yet — are real liabilities that belong on the debts side of the ledger, no differently than a car payment. That includes a balance due on your annual return, estimated quarterly payments you haven’t made, and outstanding property tax bills. The filing deadline for 2025 returns is April 15, 2026, and any amount still owed on that date is a debt against your net worth.1Internal Revenue Service. Pay Taxes on Time
If those debts sit unpaid, the IRS can file a federal tax lien, which is the government’s legal claim against everything you own — real estate, bank accounts, vehicles, and property you acquire while the lien is active.2Internal Revenue Service. Understanding a Federal Tax Lien A lien works like a mortgage or judgment: it reduces how much of your assets actually belongs to you.
Unpaid balances also grow. The IRS charges a failure-to-pay penalty of 0.5% per month, up to 25% of the balance, plus interest that compounds daily at the federal short-term rate plus three percentage points.3Internal Revenue Service. Topic No. 653, IRS Notices and Bills, Penalties and Interest Charges Include the full balance, penalties and interest included, when tallying what you owe.
The Tax Bill Hiding in Traditional Retirement Accounts
This is where the before-tax convention gets genuinely misleading. A traditional 401(k) or traditional IRA holding $500,000 is not worth $500,000 to you. Every dollar you withdraw will be taxed as ordinary income, at federal rates that currently range from 10% to 37% depending on your total taxable income.4Internal Revenue Service. Federal Income Tax Rates and Brackets State income taxes, running as high as 13.3% in certain states, stack on top. A person in the 24% federal bracket living in a state with a 5% income tax effectively owns about 71 cents of every dollar showing in their traditional retirement account.
Roth accounts are the opposite. You paid taxes on the money before it went in, so qualified withdrawals come out tax-free.5Internal Revenue Service. Roth IRAs A Roth balance’s face value is much closer to its true spending power, which is why many planners treat Roth accounts at full value and discount traditional balances when estimating after-tax net worth.
Under 59½, the picture gets worse. Withdrawals from most traditional retirement accounts before that age trigger an additional 10% early withdrawal penalty on top of regular income tax.6Internal Revenue Service. Retirement Topics – Exceptions to Tax on Early Distributions Exceptions exist, but for most early retirees relying on a 401(k), the penalty further reduces the real value of the account.
Unrealized Capital Gains Carry a Deferred Tax Cost
Brokerage accounts, investment real estate, and business interests that have grown since you bought them all carry a hidden tax liability. Nothing is owed while you hold the asset. The moment you sell, the profit triggers capital gains tax. Long-term gains on assets held more than a year are taxed at 0%, 15%, or 20% depending on income, and short-term gains are taxed at ordinary income rates.7Internal Revenue Service. Topic No. 409, Capital Gains and Losses
Higher earners face an additional 3.8% Net Investment Income Tax on capital gains, dividends, rental income, and other investment income once modified adjusted gross income exceeds $200,000 for single filers or $250,000 for joint filers.8Internal Revenue Service. Questions and Answers on the Net Investment Income Tax Someone in the 20% capital gains bracket who also owes NIIT is paying 23.8% federal tax on investment gains before state taxes.
The practical impact: if your brokerage account is worth $300,000 and your cost basis is $100,000, you’re sitting on $200,000 of unrealized gains. At a combined 23.8% federal rate, that’s roughly $47,600 in taxes owed on liquidation. The after-tax value is closer to $252,000 than $300,000.
The Step-Up in Basis Exception
One major exception applies at death. Heirs generally receive a stepped-up basis equal to the asset’s fair market value on the date of death.9Office of the Law Revision Counsel. 26 US Code 1014 – Basis of Property Acquired From a Decedent All of the capital gains that built up during your lifetime are effectively erased for the next owner. Stock you bought at $50,000 that’s worth $500,000 when you die can be sold by your heirs the next day with zero capital gains tax. For estate planning purposes, then, the before-tax valuation of appreciated assets is closer to their real value, because the tax disappears rather than transferring.
The step-up doesn’t apply to traditional retirement account balances, which remain fully taxable to whoever inherits them.
Estimating Your After-Tax Net Worth
No single formula fits everyone. The answer depends on your tax bracket, your state, and which accounts you would actually draw from. A reasonable estimate:
- Roth accounts: count at full face value, since qualified withdrawals are tax-free.
- Traditional retirement accounts: multiply the balance by (1 minus your expected combined federal and state marginal tax rate). At a 24% federal rate and 5% state rate, a $500,000 traditional IRA becomes roughly $355,000 after tax.
- Taxable brokerage accounts: subtract the estimated capital gains tax on unrealized gains (current value minus cost basis) from the current value.
- Real estate: start with fair market value, subtract the remaining mortgage, then subtract estimated capital gains tax on appreciation beyond your basis, keeping in mind the $250,000/$500,000 home sale exclusion for a primary residence.
- Cash and checking: full value, no embedded tax.
- Liabilities: subtract everything you owe, including unpaid taxes.
The result isn’t exact — your actual rate in retirement could be higher or lower than you estimate now — but it gives a more honest picture than the gross figure. For many people in their 50s and 60s with large traditional 401(k) balances, the after-tax number can be 20% to 30% below the headline.
Which Version Applies in Which Situation
Loan Applications
Banks use the standard before-tax approach. They want market value of assets minus recorded debts. They don’t subtract hypothetical future taxes on a sale that hasn’t happened, because their concern is whether collateral covers the loan if you default, not what you would pocket after selling.
Accredited Investor Status
The SEC’s accredited investor test uses a before-tax figure. One qualifying path is net worth exceeding $1 million individually or jointly with a spouse, but your primary residence doesn’t count. Retirement accounts are counted at face value; no discount for future income tax. The alternative income path is $200,000 individually or $300,000 with a spouse in each of the prior two years, with a reasonable expectation of the same in the current year.10U.S. Securities and Exchange Commission. Accredited Investors
The FAFSA
FAFSA uses its own definition. For the 2026–27 aid year, the form asks for the net worth of current investments — real estate other than the primary home, stocks, bonds, mutual funds, trust funds — and excludes two of the largest asset categories most families hold: the primary residence and retirement account balances.11U.S. Department of Education’s Federal Student Aid. 2026-27 Student Aid Index (SAI) and Pell Grant Eligibility Guide Two families with identical $1.5 million net worth statements can look completely different to the financial aid office depending on where that wealth sits.
Divorce Settlements
Divorce is one of the few legal contexts where the after-tax value genuinely matters. Splitting a $1 million portfolio 50/50 sounds fair until one spouse gets the Roth IRA and the other gets the traditional 401(k) with the same face value. The spouse holding the traditional account will owe income tax on every withdrawal.
Under federal law, transfers of property between spouses as part of a divorce are not taxable events; no gain or loss is recognized at transfer.12Office of the Law Revision Counsel. 26 US Code 1041 – Transfers of Property Between Spouses or Incident to Divorce The catch: the receiving spouse inherits the original cost basis. Stock your ex bought at $50,000 that’s now worth $200,000 comes to you with a $50,000 basis, and when you sell you owe capital gains tax on the full $150,000 of appreciation. Experienced divorce attorneys push to “tax-effect” the division, adjusting each asset’s value to reflect the tax that will eventually be owed.
Which Number Should You Use
Use the standard before-tax figure when someone else is asking: a lender, the SEC, the FAFSA (with its own carve-outs). It’s the number those systems are built around.
Use the after-tax figure when the question is your own — whether you can retire, how much you need to save, whether a proposed divorce settlement is actually equal. The before-tax number tells you what you own on paper. The after-tax number tells you what you can spend.