Year-end tax planning for Wisconsin business owners

Most business owners don't have a tax problem in April. They have a planning problem in October. By the time the calendar flips, most of the levers you wished you'd pulled are out of reach.

What follows is the short list we walk our Wisconsin clients through every fourth quarter — the moves that consistently move the needle, and the ones that rarely do.

1. Run a real projection, not a gut check

A projection tied to actual year-to-date financials is the foundation for every other decision. Without it, every other tactic below is guesswork. We typically refresh projections twice in Q4 — once in October, once in early December — to capture late-year swings.

2. Time income and expenses with intent

Accelerating expenses or deferring income to manage which year a dollar lands in only works if you know what bracket you're in this year versus next. The default answer of 'defer income, accelerate deductions' is wrong about a third of the time.

"The default answer of 'defer income, accelerate deductions' is wrong about a third of the time."

3. Revisit entity structure before year-end

S-corp owner compensation is one of the most common items we adjust in Q4. Too low triggers IRS scrutiny; too high leaves payroll-tax savings on the table. The right number is specific to the role, the industry, and the year you've actually had.

4. Use retirement plans as a tax tool, not just a savings tool

401(k)s, SEPs, defined-benefit plans — the right vehicle depends on your owner count, your cash position, and how much shelter you actually need. We frequently see owners contributing to the wrong plan for their situation.

5. Don't sleep on Wisconsin-specific items

Wisconsin manufacturing and agriculture credits, R&D credits, and pass-through entity tax elections all have year-end deadlines and quirks that out-of-state advisors routinely miss.

• ·Wisconsin Manufacturing & Agriculture Credit eligibility
• ·PTE election status for the year
• ·R&D credit documentation gathered before year-end

The bottom line

Year-end planning isn't a checklist — it's a conversation. If your CPA isn't proactively scheduling one in October or November, that's the first thing to fix.