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U.S. tax guide Bookkeeping

Reading Your Profit and Loss Statement

Understand revenue, cost of sales, operating expenses, and net income so you can ask better business questions.

5 min read August 2026

Understand revenue, cost of sales, operating expenses, and net income so you can ask better business questions. The right approach depends on your facts, filing history, state, entity structure, and current federal and state rules. Use this guide as a starting point for an informed conversation, not as a substitute for advice from a professional who has reviewed your records.

Start with accurate, complete records

Gather the documents that support income, expenses, payments, and account balances. Compare them with prior filings and current bookkeeping, note anything missing, and keep a short list of questions. Clear records reduce follow-up and help a tax or accounting professional define the engagement correctly.

Confirm scope, deadlines, and responsibility

Before work begins, confirm which federal and state filings are included, who will prepare or review them, what information you must provide, how changes are handled, and when fees become due. Tax responsibilities remain time-sensitive even when you engage a professional, so keep your own calendar of deadlines and requested actions.

Review before you approve

Read completed reports, returns, notices, or recommendations before authorizing submission. Ask about figures you do not recognize and retain a copy of the final work with the supporting records. For current forms, deadlines, and official guidance, consult IRS.gov and the relevant state tax authority.

Key Takeaways

  • Revenue shows what the business earned during the period.
  • Expenses should be complete and consistently categorized.
  • Net income is not the same as cash in the bank.
  • Compare periods and investigate unusual changes.
Guide FAQ

Frequently Asked Questions

No. It provides general educational information. A qualified professional must review your facts, records, state, filing history, and current law before providing advice.

Use IRS.gov for federal information and the official tax authority website for each relevant state. Rules and deadlines can change, so confirm current guidance before acting.

Verify the professional and use the secure document process they provide. Do not send Social Security numbers, returns, bank statements, or account credentials in an initial support message.
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