Accounting Basics Every Freelancer Should Know

You don't need to become an accountant to freelance. You need to know where each pound or dollar came from, where it went, what clients still owe you, and how much of your bank balance is already the tax authority's. This guide covers the concepts that matter, a month of real-looking numbers worked through both ways, a routine that takes about an hour a month, and the US and UK rules that set the deadlines.

Which accounting method should a freelancer use?

Most freelancers use the cash basis: record income when the client's payment arrives and expenses when you pay them. The alternative, accrual basis, records income when you earn it (usually when you invoice) and expenses when you incur them, whether or not money has moved.

In the US, the IRS describes the cash method as reporting income in the year you actually or constructively receive it, and the accrual method as reporting it when earned (IRS Publication 538, accessed 27 October 2026). Most sole proprietors who sell services and hold no inventory can use the cash method; Publication 538 sets out when accrual is required. Once you have chosen a method you generally need IRS permission to change it, so pick deliberately.

In the UK, the cash basis is now the standard way for sole traders and partnerships to record income and expenses (the rules changed from 6 April 2024). You can choose traditional (accrual) accounting instead, and you must say so on your Self Assessment return (GOV.UK, cash basis, accessed 27 October 2026).

Cash basis is simpler and matches your bank balance. Accrual gives a truer picture of a month's work when you invoice in one month and get paid in another, which is why lenders and investors prefer it. Many freelancers keep their tax records on the cash basis and still track unpaid invoices, so they get both views.

Worked example: one freelancer's October, both ways

Hypothetical US designer; the numbers are illustrative. In October the designer issues three invoices: $3,000 (paid 20 October), $2,000 (due 14 November) and $1,500 (due 30 November). A $1,200 invoice from September is also paid in October. Business expenses paid in October: software $90, a subcontractor $400 and a coworking pass $150, so $640 in total.

Same month, same work, a $2,300 difference in profit. On the cash basis the $3,500 still owed is not income until it lands; on accrual it already is. Either way, the $3,500 is your accounts receivable, and it is the number to chase.

How much to set aside? US self-employment tax is 15.3%: 12.4% for Social Security and 2.9% for Medicare (IRS, self-employment tax, accessed 27 October 2026). 15.3% of October's cash-basis profit is $544.68. Schedule SE calculates the tax on slightly less than your full profit, so that is a cautious figure, and income tax comes on top at your own rate. Moving a fixed share of each payment into a separate tax savings account the day it arrives is the habit that prevents a shock in April. Self-employment tax and quarterly tax payments go into the detail.

What do the three financial reports tell you?

• Profit and loss (income statement): income minus expenses for a period. It answers "did I make money this month or year?" and is the basis of your tax return.
• Balance sheet: what the business owns (cash, money owed by clients) and owes (card balances, tax due) at one date. It answers "what is left if I stopped today?"
• Cash flow statement: where cash came from and went in a period. It explains why a profitable month can still leave the bank account low, as in the accrual column above.

The US Securities and Exchange Commission's beginners' guide to financial statements explains each in plain language. A solo freelancer on the cash basis mostly needs the profit and loss and a list of unpaid invoices; the balance sheet matters once you have loans, equipment or a company.

What is a chart of accounts, and how simple can yours be?

A chart of accounts is the list of categories you sort every transaction into. Keep it short and match it to the lines on your tax return, so year-end is a copy job. A US sole proprietor can mirror the Schedule C expense lines (advertising, contract labor, office expense, software and subscriptions under other expenses, travel, meals and so on); a UK sole trader can mirror the expense boxes on the self-employment pages of the Self Assessment return.

Add one income account per service line if you want to see which work pays best, and keep "owner draws" (money you pay yourself) out of expenses: it is not a business cost. If you use accounting software it will usually give you a starter chart; prune it rather than add to it. Double-entry bookkeeping sits behind most software, but on a simple cash basis you can start with single entry: a dated list of money in and money out. The IRS calls single entry "the simplest to maintain" and "a simple and practical system if you are starting a small business", while noting that double entry has built-in checks (IRS Publication 583, revised December 2024, accessed 27 October 2026).

Which records do you need to keep, and for how long?

Keep the document behind every number: the invoice for each payment you received and the receipt or bill for each expense. The IRS lists invoices, bank deposit slips, receipt books, card slips and Forms 1099-NEC among the documents that support gross receipts, and recommends opening a business checking account kept separate from your personal one (IRS Publication 583). Clear, numbered invoices make this easy; see what to include on an invoice and invoice numbering systems.

How long to keep them:

• US: generally 3 years from when you filed the return, longer in some cases, such as 4 years for employment tax records, 6 years if you under-reported income by more than 25%, and 7 years for a bad-debt or worthless-securities deduction (IRS, how long should I keep records?, accessed 27 October 2026).
• UK: at least 5 years after the 31 January submission deadline of the relevant tax year (GOV.UK, business records if you're self-employed, accessed 27 October 2026).

Where and how to file them is covered in the invoice record-keeping guide and business expense tracking.

What does a monthly close look like for a freelancer?

About an hour, on the same day each month:

1. Send any invoices for work finished last month. Unbilled work is the most common leak.
2. Record every payment received against its invoice, including partial payments.
3. Categorise every expense and attach or file its receipt.
4. Reconcile: tick each line on the bank and card statements against your records. Anything unmatched is a missing record, a duplicate or something you didn't authorise.
5. Review unpaid invoices and send reminders for anything overdue.
6. Move the tax set-aside for the month's payments if you haven't already.
7. Glance at the profit and loss against last month and the same month last year.

If this regularly takes more than a couple of hours, or you have staff, stock or several entities, a bookkeeper is usually worth the cost. How bookkeepers invoice shows what that service typically includes.

When are freelance taxes due?

US. You generally must make estimated tax payments if you expect to owe $1,000 or more when you file (IRS, estimated taxes, accessed 27 October 2026). The four due dates are 15 April, 15 June, 15 September and 15 January of the following year (moved to the next business day when they fall on a weekend or holiday). You generally avoid the underpayment penalty by paying at least 90% of this year's tax or 100% of last year's, whichever is smaller; higher earners have a stricter rule in IRS Publication 505. Self-employment tax applies once your net earnings from self-employment are $400 or more.

UK. Self-employed people file a Self Assessment return and pay by 31 January after the tax year ends. If last year's bill was £1,000 or more and less than 80% was paid at source, you also make two payments on account, each usually half of last year's bill, by 31 January and 31 July (GOV.UK, payments on account, accessed 27 October 2026). Making Tax Digital for Income Tax requires digital records and quarterly updates for sole traders and landlords with qualifying income over £50,000 from 6 April 2026, over £30,000 from 6 April 2027 and over £20,000 from 6 April 2028 (GOV.UK, check if you're eligible for Making Tax Digital for Income Tax, accessed 27 October 2026).

Rules last checked 27 October 2026. This is general information, not tax or accounting advice; check with the IRS, HMRC or a qualified adviser for your situation. Deductions are covered in freelance tax deductions, and year-end steps in year-end tax planning.

Where does invoicing software fit, and where doesn't it?

Invoices are where your income records start, so clean invoices make every later step easier. But invoicing software and accounting software do different jobs, and the accounting hub and the guide to invoicing versus accounting software explain the split.

What InvoiceQuickly covers today:

• Numbered invoices with line items, one discount and one tax percentage, as PDFs, on every plan.
• Recording full or partial payments (bank transfer, card, cash, check or other) and seeing each invoice's remaining balance, on every plan.
• A dashboard of all-time figures kept separate per currency: payments received, amount outstanding, number of invoices and number of clients.
• On Pro ($9/month): email delivery, scheduled reminders, recurring invoices, Stripe or PayPal payment links on your own account, and invoice CSV export for your bookkeeping. Pro also records expenses with client, project and billable flags, tracks time with a timer, and has reports on invoices, payments, expenses, time, aging and unbilled work for a date range, per currency.
• On Business ($19/month): a reviewed, manual export of selected invoices and their client to QuickBooks Online or Xero, with your own account, item and tax mapping. Payments are not sent, and nothing comes back from the ledger.

What it does not do:

• No bank feeds or bank reconciliation, and no stored receipt files.
• No general ledger, profit and loss, balance sheet or tax reports.
• No two-way or automatic accounting sync, and no connection to accounting software other than QuickBooks Online and Xero. The CSV export has no amount-paid or balance column, so take cash receipts from your bank records, not the export.

So the practical setup for most freelancers is an invoicing tool for billing, expenses and getting paid, plus a spreadsheet or accounting software for the ledger, reconciliation and tax reports. Start free with 5 invoices and 5 clients, or see pricing.

When these basics aren't enough

• You hold stock or sell goods. Inventory changes the accounting method rules and needs proper cost-of-goods tracking.
• You trade through a company (an LLC taxed as a corporation, an S corporation, or a UK limited company). Payroll, company accounts and separate filings apply; get an accountant.
• You have income in several countries or clients paying in several currencies. Residency, double-tax treaties and conversion rules need professional advice.
• You are behind on returns or have a notice from the IRS or HMRC. Talk to a qualified adviser before you file anything.

For first-time billing, see how to invoice for the first time; for opening the separate account, business banking for freelancers. More guides are on the blog.

Frequently asked questions

Should a freelancer use cash or accrual accounting?

Most freelancers who sell services and hold no inventory use the cash basis: income when paid, expenses when paid. It matches the bank balance and is the standard method for UK sole traders. Accrual shows a truer picture when you invoice in one month and get paid in another. In the US, changing method later generally needs IRS permission.

How much should I set aside for taxes as a freelancer?

In the US, start with 15.3% of profit for self-employment tax, then add your expected income tax rate. In the UK, set aside for income tax and Class 4 National Insurance on your profit (6% on profits between £12,570 and £50,270 and 2% above that in 2026 to 2027, per GOV.UK), plus payments on account if they apply to you. Move the set-aside into a separate account each time a client pays.

Do I need a separate bank account as a freelancer?

The IRS recommends opening a business checking account kept separate from your personal one, and it makes reconciliation and proving business expenses far easier. Run every client payment and every business cost through it, and pay yourself by transfer.

What records should a freelancer keep?

Every invoice you issue, every receipt or bill you pay, bank and card statements, and tax forms such as 1099-NEC. Keep them for at least 3 years after filing in the US (longer in some cases) and at least 5 years after the 31 January deadline in the UK.

Do I need accounting software as a freelancer?

Not at the start. A spreadsheet of money in and money out, reconciled monthly, works for a small number of transactions. Accounting software becomes worth it when you have many transactions, want bank feeds, or need reports for a lender. In the UK, Making Tax Digital for Income Tax requires compatible software once your qualifying income is over the threshold.

Can InvoiceQuickly do my bookkeeping?

No. InvoiceQuickly creates invoices, records payments and shows what is outstanding, and Pro adds expenses, time tracking and invoice, payment, expense and time reports. It keeps no ledger and has no bank reconciliation, profit and loss or balance sheet. Business can export selected invoices to QuickBooks Online or Xero for your books. Use it alongside a spreadsheet or accounting software.