A small business CPA is an accountant who handles both the compliance and the planning side of a company's taxes, and the strategic ones are already thinking about Q4 in August. That is the tell that separates a compliance shop from a strategy practice: whether year-end planning starts with four months of runway or four weeks of panic.

Here is the uncomfortable truth about December tax planning. It is mostly triage. The moves that meaningfully lower a bill, adjusting owner compensation, timing a large purchase, making an entity election, funding a retirement plan, all take time to execute correctly, and most of them have a hard December 31 deadline. Start in August and you can do them right. Start on December 20 and you are picking from whatever is left.

What a strategic small business CPA is actually doing in August, ahead of Q4:

  • Projecting your full-year income now, so there are no surprises at filing
  • Checking where you land against the 2026 QBI thresholds ($201,750 single, $403,500 joint, per Rev. Proc. 2025-32) and structuring compensation around it
  • Confirming your September 15 Q3 estimated payment reflects real numbers
  • Mapping equipment or property purchases you were going to make anyway into the tax year where they help most
  • Reviewing retirement plan options while there is still time to set one up

There is a reason the calendar matters this much. Nearly every real tax lever is a before-year-end lever. A CPA whose entire process runs January through April structurally cannot touch any of it, no matter how good they are at the filing itself.

The QBI deduction is a useful anchor for the whole conversation. It is now permanent, worth up to 20% of qualified pass-through profit, with a guaranteed $400 minimum for smaller active businesses in 2026 (OBBBA / Rev. Proc. 2025-32). But how large it comes out depends on decisions, compensation splits, entity structure, that have to be made before the year closes. A strategic small business CPA builds around it now. A filing-season one reports whatever it happened to be.

Common questions

When should year-end tax planning start? August or September. Most tax-reducing moves have a December 31 deadline and take time to execute.

What does a small business CPA do beyond filing? Income projection, QBI and compensation structuring, estimated-payment review, purchase timing, and retirement planning, all before year-end.

What is the QBI deduction worth in 2026? Up to 20% of qualified pass-through income, permanent, with a $400 minimum for active businesses with at least $1,000 of QBI.

HYON Q's small business CPAs plan Q4 in Q3. Free 30-minute call: https://www.hyonq.com/book-consultation