A bank or credit-card statement can show that a payment occurred, but it may not explain what was purchased or its business purpose. Keep supporting documents that identify the payee, amount, date, item or service, and relevant business use.

A bookkeeping category called business expense is not a substitute for evidence. Some categories, including certain vehicle and travel costs, have particular substantiation requirements. An unsupported amount may be challenged or disallowed.

Save receipts when the purchase occurs and connect them to the bookkeeping entry. Add a short purpose note when it will not be obvious later. Keep records orderly and accessible so a tax return can be prepared from evidence rather than memory.

Your next steps

• Retain invoices, receipts, and payment records.
• Add the business purpose and any personal-use allocation.
• Match documents to the books before filing.

General education, not individualized tax or legal advice. Illustrations use stated assumptions and do not promise a refund or tax saving.