Track net worth with dated asset-and-debt snapshots, and track investment results with a separate record of contributions, withdrawals, and portfolio values. A growing balance can reflect new savings, so a net-worth chart alone cannot tell you your investment return.
Keep a balance history and a cash-flow record
A net worth snapshot answers “What did I own and owe on this date?” An investment record answers “How much did I add, withdraw, and earn?” Keep both. Start with the asset/liability inventory for real estate, investments, cash, and debt, then add a separate table for portfolio flows.
Save account balances, the valuation date, currency, source, and any estimate notes. Record investment contributions and withdrawals with actual dates. Keep the same accounts inside your portfolio definition from one period to the next, or explicitly note when that boundary changes. Investor.gov’s brokerage-statement guide identifies deposits, withdrawals, fees, and account assets as separate information to review.
Separate contributions from investment gains
For a fixed group of investment accounts, dollar gain or loss = ending value − starting value − external contributions + external withdrawals. This reconciles balances; it is not a percentage return. It includes income retained in the accounts and the effect of fees deducted there. Record cash distributions paid outside the portfolio as withdrawals so they are included in the reconciliation, and do not add retained dividends a second time.
| Period | Start | Contributions | Withdrawals | End | Dollar gain/loss |
|---|---|---|---|---|---|
| Month 1 | $100,000 | $5,000 | $0 | $107,000 | +$2,000 |
| Month 2 | $107,000 | $2,000 | $1,000 | $106,000 | −$2,000 |
| Month 3 | $106,000 | $3,000 | $0 | $110,000 | +$1,000 |
Over these three months, the portfolio rises by $10,000. Net external contributions are $9,000, leaving $1,000 of investment gain after costs reflected in the balances. Calling the entire $10,000 an investment gain would confuse saving with performance.
A transfer between two accounts inside this portfolio is neither an external contribution nor an external withdrawal. Moving money from an included checking account into the portfolio is a portfolio contribution, but it remains an internal transfer in the broader household net worth statement. Define the boundary before labeling a flow.
Percentage returns need cash-flow timing
When there are no external flows, dividing the period’s dollar gain by starting value gives a simple period return. Once you add or withdraw money during the period, that shortcut can mislead because the money was not all invested for the same length of time. Keep exact flow dates and use a documented return method rather than treating the balance-change percentage as performance.
A time-weighted return links subperiod returns to reduce the effect of external cash flows. A money-weighted return reflects the timing and size of those flows; Fidelity’s explanation of investment returns compares the two methods. If you compare a broker’s report with another app, check the method, dates, fees, and included accounts first. FINRA explains the distinction between dollar return and rate of return in Return and Rate of Return.
Build charts that show what changed
Use one chart for total assets, liabilities, and net worth, and a separate chart for the investment portfolio. For the portfolio, plot both actual value and starting capital plus cumulative net contributions. The gap shows cumulative dollar gain or loss under the reconciliation above, rather than a percentage return.
Use actual snapshot dates on the horizontal axis. Mark a missing month as missing instead of zero. If you carry forward a property estimate, identify it as an estimate. Keep historical observations visually separate from projected values; the financial-independence calculator models a future path from assumptions, not past investment performance.
Correct past values without losing the explanation
- Check the original statement or valuation source before editing.
- Record the affected account, snapshot date, original value, corrected value, and reason in a correction log.
- Correct the historical snapshot, then recalculate totals and any affected chart or return period.
- Keep the original source and the date you made the correction so the change is explainable later.
A $10,000 typo discovered today belongs in the old snapshot, not as $10,000 of current investment performance. A genuine new property valuation belongs on its new effective date; it is different from fixing a transcription error. If software cannot edit history, keep a reconciliation note and do not invent a contribution to force the totals to match.
Choose tools that preserve your records
Before importing years of data, test dated snapshots, manual corrections, closed accounts, flow records, and exports. Compare these features in the net worth tracking tools guide. For a custom record and chart workflow, see Beacon vs. a spreadsheet; for spending detail, see net worth tracking vs. budgeting.
Common questions
Is an increase in net worth the same as an investment return?
No. Net worth can change because of saving, spending, debt, property revaluations, investment performance, or corrections. Record portfolio contributions and withdrawals separately from investment gains.
How should I correct an old net worth snapshot?
Verify the source, record the original and corrected values with a reason, update the affected historical snapshot, and recalculate the totals and charts. Do not treat a correction as a new investment gain.
Connect your investable assets to an FI date
Use consistent inputs and explicit assumptions to explore a projected path.
Try the FI calculator