Side Income Log
Log freelance and side-hustle income with source.
Overview
The Side Income Log is a clean ledger for every dollar earned outside your primary paycheck: freelance projects, consulting fees, gig-economy payouts, rental income, royalties, eBay or Etsy sales, tutoring, side-of-desk contract work. Each entry stores the date, source, amount, currency, and an optional note so the running annual total is always one screen away and the year-end tax conversation starts with real numbers instead of guesses.
For most jurisdictions, side income is taxable regardless of whether a 1099 or similar form is issued. Keeping a contemporaneous log is the difference between confidently reporting the income at filing time and either underreporting it (audit risk) or overreporting from memory (overpaid tax). The log is also useful mid-year when deciding whether to make quarterly estimated tax payments.
How it works
Each entry stores date, source (client, platform, or counterparty), amount, currency, and free-form notes for invoice number, project description, or payment method. The list runs in reverse chronological order with a running annual total and, optionally, a per-source subtotal so a single platform's contribution to the year is one read away.
The log is income-only; expenses related to the side work go in the Tax Deduction Log so net profit can be calculated by subtracting one annual total from the other at tax time.
Examples
- Log a $2,400 freelance design invoice with the client name as the source and the project description in the notes; the running total reflects it immediately.
- Record gig-platform payouts weekly (rideshare, delivery, dog-walking) so each platform's annual contribution is clear by year-end.
- Capture a $500 honorarium for a speaking engagement with the host organisation as the source and a note about whether tax was withheld.
- Track marketplace sales with the platform as the source and the gross payout as the amount; record fees separately in the deduction log.
FAQ
Is side income taxable even without a 1099?
In most jurisdictions, yes. The form is just paperwork; the underlying obligation is to report income. The log gives you the data to do that accurately.
Should I log gross or net of platform fees?
Log gross, then log fees separately in the Tax Deduction Log. This matches how most tax forms ask for the information and gives you the cleanest audit trail.
What about cash payments?
Log them too. Cash income is still income, and contemporaneous records are the strongest defence if a tax authority asks.
Do I need to log expenses to be deductible?
Yes, but they go in the Tax Deduction Log, not here. Keeping income and expense ledgers separate matches the schedule layout most tax filings use.
What about quarterly estimated taxes?
Periodically multiply the running income total by your marginal rate (plus self-employment tax where applicable) to estimate what you owe so far this year. Many filers use that figure to size quarterly payments.