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How to build and read a profit and loss statement
A useful profit and loss statement starts with complete transactions and a defined reporting period. Build the report from the ledger, then investigate the income and expense patterns before sharing it.
This guide describes common bookkeeping practice, not a legal or regulatory requirement.
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General information, not legal or tax advice.
Set the reporting period and assemble the ledger
The IRS describes an income statement as income and expenses for a given period. Collect sales, credits and expense records using the same cutoff. Preserve the accounting basis with the report so comparisons do not silently switch between cash and accrual treatment.
Sources: IRS Pub 583
Separate receipts from the cost of merchandise
For a product business, Publication 334 derives gross profit from net receipts less cost of goods sold. It distinguishes service businesses where merchandise is not an income-producing factor. Review how returns, allowances and inventory costs are recorded before using gross profit to evaluate operations.
Sources: IRS Pub 334 (2025)
Read an illustrative contractor layout
As a fictional layout without dollar assumptions, a contractor might group earned job revenue above materials and subcontract costs, then show office overhead separately. The purpose is to make classification questions visible. Ask whether an unusual result reflects work performed, a late invoice or a transaction posted to the wrong category.
Package the statement for its intended reader
IRS guidance connects accurate financial statements with good records and bank discussions. SBA encourages close attention to money entering and leaving the business. Give the reader the period, basis and explanation of unresolved items; keep any tax-return mapping with your CPA rather than treating the management report as a filed return.
Sources: IRS Pub 583; SBA - Manage your business
Sources: set the reporting period and assemble the ledger
Continue with balance sheet vs. income statement
Build reports you can discuss
Tidwell helps reconcile the books and organize supporting schedules for your business decisions. We work with your CPA on tax questions and the financial records they need.