Bookkeeping for solopreneurs: a 20-minute weekly system

Nobody starts a business because they love bookkeeping. But a small, regular habit beats a weekend of panic before the tax deadline. Here is a system that takes about 20 minutes a week.

This guide covers good habits, not tax or legal advice. Tax rules differ by country and by the type of business you run, so check the specifics with an accountant or your tax authority.

The one-time setup

1. Separate business and personal money

Open a separate bank account for the business, even if you are a sole trader and the law doesn’t require it. Pay all business income into it and all business costs out of it. This one step makes bookkeeping, taxes and any future loan or sale far easier.

2. Choose how you will invoice

You need professional invoices with a number, a date, what you did and your payment terms, plus a way to see who hasn’t paid. An invoicing app such as FreshBooks handles this and sends payment reminders for you. A spreadsheet can work while you have only a few clients.

3. Set up a tax savings account

Open a second savings account and move a fixed percentage of every payment you receive into it. Ask your accountant what percentage fits your situation; many solopreneurs use somewhere between 20% and 30% as a starting point. Money in this account is not yours to spend.

4. Decide where receipts go

Pick one place for every receipt: a folder in your cloud storage, or the receipt-capture feature in your bookkeeping app. Snap a photo the moment you get a paper receipt.

5. Put simple contracts in place

A short written agreement for each client (what you will deliver, when, for how much, and when you get paid) prevents most payment disputes. Template services such as Rocket Lawyer have ready-made service agreements you can adapt.

The 20-minute weekly routine

Pick the same time each week; Friday afternoon works well.

1. Send invoices for any work finished this week. (5 minutes)
2. Chase anything overdue with a polite reminder. (3 minutes)
3. Match the week’s bank transactions to income and expense categories in your app or spreadsheet. (7 minutes)
4. File receipts for anything you bought. (3 minutes)
5. Move the tax percentage of this week’s income into the tax account. (2 minutes)

Once a month

• Look at three numbers: income, expenses and what’s left. Is it going the right way?
• Check your subscriptions and cancel anything you didn’t use.
• Look at who owes you money and for how long.

Once a quarter

• Check whether you need to pay estimated or advance tax. In some countries, including the US, self-employed people pay tax in instalments during the year.
• Send your books to your accountant if you have one. A quick quarterly check is cheaper than fixing a year of mistakes.

Habits that get you paid faster

• Invoice the same day you finish the work.
• Short payment terms. “Due in 14 days” gets paid faster than “due in 30 days”.
• Make it easy to pay: card and bank transfer, with a payment link on the invoice.
• Ask for a deposit on larger projects before you start.

When to get an accountant

Consider one when you register as a company, take on staff, sell across borders or simply spend more than a few hours a month worrying about tax. A good accountant often saves more than they cost, and your tidy weekly records will make their job (and their bill) smaller.

Free tools for this

Tools mentioned in this guide

Frequently asked questions