Schedule C Recordkeeping: Bank Statements, Books and Supporting Documents

Clean records make a Schedule C easier to prepare and easier to support. The IRS page on what kind of records to keep gives a simple framework: books that clearly show income and expenses, backed by documents that support each entry. Here is how it applies to a client with a business bank account.

Start with books that clearly show income and expenses

The IRS says you may choose any recordkeeping system suited to your business, as long as it clearly shows your income and expenses. The type of business you are in affects the records you need to keep for federal tax purposes.

The system should include a summary of your business transactions. This summary is ordinarily made in your business books, such as accounting journals and ledgers. Your books must show your gross income, as well as your deductions and credits.

For most small businesses, the business checking account is the main source for entries in the business books. In practice, the bank account and its statements are where most of your clients' entries will start. The IRS also lists account statements among the documents that support expenses.

Accounting software or another electronic system is fine if it meets the same basic recordkeeping principles. All requirements that apply to hard copy books and records also apply to electronic records.

Supporting documents back up the books

Purchases, sales, payroll and other transactions generate supporting documents. The IRS names sales slips, paid bills, invoices, receipts, deposit slips and canceled checks. They contain the information you record in your books, and they support the entries in your books and on your tax return.

Keep them in an orderly fashion and in a safe place. The IRS suggests organizing them by year and by type of income or expense.

Gross receipts: Forms 1099 are not the whole picture

Gross receipts are the income you receive from your business. Keep documents that show the amounts and sources of that income. The IRS lists these examples:

• Cash register tapes
• Deposit information (cash and credit sales)
• Receipt books
• Invoices
• Forms 1099-MISC

Related IRS instructions explain when forms such as 1099-NEC and 1099-K are issued. For tax years beginning after 2025, Form 1099-NEC is filed for each person paid at least $2,000 in the course of business for services performed by someone who is not an employee (including parts and materials), or for payments to an attorney (box 1a).

For Form 1099-K, the current instructions say a third party settlement organization (TPSO) must report payments in settlement of third party network transactions with a participating payee that exceed $20,000, when the total number of such transactions also exceeds 200.

These thresholds decide when a payer or TPSO has to issue a form. A client may therefore have business receipts with no form at all. The books still have to show gross income, so match what the forms report against deposits and invoices rather than relying on the forms alone.

Purchases and expenses: what each document should show

Purchases are items you buy and resell to customers. Expenses are the costs of carrying on the business other than purchases. For both, the supporting documents should identify:

• The payee
• The amount paid
• Proof of payment
• The date incurred
• A description of the item or service that shows the amount was for a purchase or a business expense

Examples include canceled checks or other proof of payment (including electronic funds transfers), cash register tape receipts, credit card receipts and statements, and invoices. For expenses, account statements are also listed. The IRS notes that a combination of documents may be needed to substantiate all elements of a purchase or expense.

Travel, gifts and transportation

If you deduct travel, gift or transportation expenses, you must be able to prove (substantiate) certain elements of those expenses. The IRS points to Publication 463, Travel, Gift, and Car Expenses, for details.

Business assets

Keep records for machinery, furniture and other property used in the business. You need them to compute annual depreciation and the gain or loss when you sell an asset. The records should show:

• When and how you acquired the asset, and the purchase price
• The cost of any improvements
• Section 179 deduction taken, and deductions taken for depreciation or casualty losses
• How you used the asset
• When and how you disposed of it, the selling price and the expenses of sale

Purchase and sales invoices, real estate closing statements, and canceled checks or other proof of payment may show this information.

Employment taxes

Specific employment tax records are required. Keep all records of employment for at least four years. The IRS refers to Recordkeeping for employers and Publication 15, Circular E, Employer's Tax Guide.

What to tell clients

• Use a system that clearly shows income and expenses, and make the business bank account the base for entries.
• Keep supporting documents for every entry and organize them by year and by type of income or expense.
• Do not rely only on Forms 1099: record all gross receipts and document their amounts and sources.
• For each expense, be able to show payee, amount, proof of payment, date and description.
• Keep employment records for at least four years.
• For more detail, see Publication 583, Starting a Business and Keeping Records.

Informational only, based on the IRS source linked above; not tax or legal advice for a specific situation.