What documents does your accountant actually need?

Every tax season, the same pattern: accountant sends a request list, client spends two weeks hunting for documents, files late or in a rush. It's not that the documents are hard to find — it's that nobody organised them during the year when each one arrived.

This post is the list your accountant will almost certainly ask for, written so you can prepare it before they do.

Tax requirements vary significantly by country, income type, and personal circumstances. This list covers the most common documents for an individual or sole trader. Your accountant will know what's specific to your situation.

For everyone (employed or self-employed)

• Proof of identity: Copy of passport or national ID. Some accountants need this for compliance checks, particularly for new clients.
• Bank statements: Typically the full year for your primary accounts.
• Prior year tax return: So your accountant can see your starting position and spot anything that carries forward.
• Details of any significant financial events: Property purchase or sale, inheritance, a large gift given or received, starting or ending a pension.

If you're employed

• Year-end earnings statement (P60 or equivalent): Your employer issues this after the tax year ends. It's the summary your accountant needs most.
• Benefits statement (P11D or equivalent): Required if you receive a company car, health insurance, or other taxable benefits through your employer.
• Payslips: Usually your accountant only needs the year-end total, but having 12 months on hand is useful if there are queries.
• Pension contribution statements: From both you and your employer — these affect your tax position.

If you're self-employed or freelance

• Invoices issued: Total income for the year, ideally in a spreadsheet or accounting software export.
• Expenses: Receipts or records for anything you're claiming, broken into categories — travel, equipment, professional subscriptions, home office if applicable.
• Mileage log: If you're claiming vehicle expenses.
• Business bank statements: Separate from personal, ideally. Makes the accounting considerably cleaner.
• Any subcontractor payments made: If you've paid others to do work, your accountant may need the details.

Property income

• Rental income received — total for the year, by property
• Expenses: mortgage interest, letting agent fees, maintenance and repairs, insurance, ground rent and service charges
• If you sold a property: the original purchase price, purchase costs, sale price, sale costs, and the dates of both transactions

Investments

• Dividend statements
• Capital gains: details of shares, funds, or other assets sold during the year — purchase price, sale price, and dates
• Tax-sheltered account statements (ISA, retirement accounts, etc.) — even tax-free accounts sometimes need to be reported

Deductions and reliefs

• Pension contributions (personal, not employer) — amount and provider
• Charitable donation records (gift aid or equivalent)
• Professional membership fees, if deductible in your jurisdiction
• Any other reliefs you think apply — your accountant will tell you if they don't

The year-round system that makes this easy

The reason this list feels overwhelming at tax time is that the documents arrived throughout the year and were filed — or not filed — in twelve different places. The fix is simple: a dedicated folder, physical or digital, labelled with the tax year. Every time a relevant document arrives — payslip, dividend statement, receipt for a business expense — it goes in the folder. At tax time, you hand over the folder.

This takes about thirty seconds per document. Doing it consistently throughout the year is the entire system.

The accountant's list doesn't change much year to year. Once you know what they need, gathering it is just a filing system away from being trivial. The time you save your accountant is time — and fees — you save yourself.