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Bookkeeping for Solo Service Providers and Freelancers
For a one-person business, bookkeeping comes down to a separate account, a short weekly habit and money set aside for taxes as it is earned, and the IRS's own guidance spells out most of what to keep.
General information, not legal/tax/financial advice; talk to a licensed professional about your situation.
At a glance
- Bookkeeping for the self-employed is the habit of recording what came in, what went out and why, often enough that the books are ready whenever a lender, a preparer or the IRS asks.
- Most U.S. small businesses have no employees: 82.3%, or about 29.8 million firms, according to the SBA Office of Advocacy, and 86.7% of those are sole proprietorships.
- Self-employment tax is 15.3% (12.4% for Social Security and 2.9% for Medicare), and anyone who expects to owe $1,000 or more when filing generally has to pay estimated tax during the year.
- A twenty-minute weekly routine and a separate tax savings account cover most of what a solo business needs, with a preparer checking the work once a year.
Part 1 | The business needs its own account before it needs software
The most common bookkeeping problem in a one-person business is a single checking account that pays for client supplies, groceries, a phone bill and a car payment, so that every statement has to be sorted line by line in April. The owner's instinct is to buy software first: I need a better app. The IRS's guide for new businesses starts somewhere simpler, recommending that a new business open a business checking account and keep it separate from personal accounts, which turns most of the sorting into a habit that happens at the moment of each payment.
That separation matters for a large share of the country's businesses. According to the SBA Office of Advocacy's 2026 summary, 82.3% of U.S. small businesses, about 29.8 million firms, had no employees in 2022, and 86.7% of those nonemployer firms were sole proprietorships, the stylists, cleaners, tutors, trainers, photographers, consultants and tradespeople who report business income on their personal return.
| What you need to show | Documents that support it |
|---|---|
| Gross receipts (money coming in) | Bank deposit slips, receipt books, invoices, credit card charge slips, Forms 1099-NEC and 1099-MISC |
| Expenses | Canceled checks, account statements, credit card slips, invoices, petty cash slips |
| Purchases for resale | Canceled checks, receipts, credit card slips, invoices |
| Assets such as equipment or a vehicle | Purchase and sales invoices, closing statements, canceled checks |
| Travel, vehicle and gift expenses | Specific rules apply; see IRS Publication 463 |
Part 2 | A twenty-minute weekly habit keeps the year from piling up
A short weekly session catches mistakes while the details are still fresh and spreads the year's bookkeeping into pieces of about twenty minutes. The routine below is written for a solo provider using any spreadsheet or bookkeeping app.
The Friday checklist
- Download the week's transactions from the business account and card.
- Give each transaction a category (supplies, software, vehicle, insurance, education, client meals and so on).
- Photograph or forward every receipt over a set amount, with a short note on the business purpose.
- Log business miles driven, with date, destination and purpose.
- List unpaid invoices and send a polite reminder for anything past due.
- Move the week's tax set-aside into a separate savings account (see Part 3).
- Note anything unusual (a refund, a cash payment, a personal charge on the business card) for your preparer.
Keep the records for as long as the IRS can still ask about them. The general rule is three years from filing, six years if income was underreported by more than 25%, seven years for a bad debt or worthless securities deduction and at least four years for employment tax records if you later hire.
Part 3 | Taxes are easier when the money moves on the day it arrives
A self-employed person pays both halves of Social Security and Medicare through self-employment tax, at a combined 15.3% on net earnings, and owes it once net earnings from self-employment reach $400. On top of that sits regular federal income tax and, in most states, state income tax, and nobody withholds any of it from a client's payment.
The IRS generally expects estimated tax payments from anyone who will owe $1,000 or more when filing, and most people avoid the underpayment penalty if they paid at least 90% of the current year's tax or 100% of the prior year's tax, whichever is smaller (higher earners face a stricter rule, explained in IRS Publication 505). A set-aside percentage, agreed with a preparer and moved every week, turns that rule into a habit.
| Net profit per month (Assumption) | $5,000 |
|---|---|
| Set-aside percentage (Assumption; ask your preparer for yours) | 25% |
| Set aside per month (Calculated) | $1,250 |
| Set aside per quarter (Calculated) | $3,750 |
| Set aside per year (Calculated) | $15,000 |
Illustrative example only. The right percentage depends on your income, deductions, state and household, and a preparer can estimate it from last year's return.
How you compare
- Cash on hand: in a JPMorgan Chase Institute study of 597,000 small businesses, personal services firms held a median of 21 days of cash outflows in reserve, against 27 days for small businesses overall.
- Separate accounts: if any personal spending still runs through the business account, that is the first fix.
- Your own baseline: time how long it takes to answer three questions today: what you earned last month, what you spent, and how much is set aside for taxes; the weekly routine should bring that under five minutes.
Questions to ask this week
Does any personal spending still run through the business account? Open a separate account if it does.
Could you find last month's receipts in five minutes? If not, pick one place to send every receipt.
How much is set aside for taxes right now? Compare it with what your preparer estimates you will owe.
Which invoices are past due? Send the reminders on Friday.
Start this Friday by downloading the week's transactions, giving each one a category and moving your tax set-aside into its own account.
About this research: This article draws on IRS Publication 583 and IRS guidance on self-employment tax, estimated tax and record retention, the SBA Office of Advocacy's Frequently Asked Questions About Small Business (2026) and a JPMorgan Chase Institute study of small business cash balances. The set-aside example is illustrative and is not a tax recommendation.
Sources
- Internal Revenue Service. Publication 583, Starting a Business and Keeping Records. Revised December 2024.
- Internal Revenue Service. Self-Employment Tax (Social Security and Medicare Taxes).
- Internal Revenue Service. Estimated Taxes.
- Internal Revenue Service. How Long Should I Keep Records?
- U.S. Small Business Administration Office of Advocacy. Frequently Asked Questions About Small Business 2026. February 2026; 2022 data.
- JPMorgan Chase Institute. Cash Is King: Flows, Balances, and Buffer Days. 2016. 597,000 small businesses.
Related reading: What Messy Books Cost at Tax Time · When to Hire a Tax Preparer for Your Small Business, and What to Bring · Retirement Plans for Small Business Owners: SEP IRA, SIMPLE IRA or Solo 401(k) · A One-Hour Year-End Review for Small Business Owners
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