Tax Planning Strategies for Small Businesses

Most small business owners think about taxes once a year — when their accountant calls in March asking for documents. That reactive approach costs money. The businesses that consistently pay less in taxes aren't doing anything exotic. They're simply planning ahead.

Here are the strategies that make the biggest difference.

You can't plan what you can't see. The foundation of any tax strategy is clean, current financials. If your books are three months behind, you're flying blind.

By October or November, you should have a clear picture of:

• Year-to-date revenue and net income
• Estimated Q4 performance
• Major expenses already incurred
• Any large purchases or investments planned before December 31

With that picture in hand, you can make informed decisions — not guesses.

The basic principle of year-end tax planning is straightforward: if you expect to be in the same or higher tax bracket next year, pull deductions into the current year and push income into the next.

Accelerating deductions might look like:

• Prepaying January rent or insurance premiums in December
• Purchasing equipment or software you were planning to buy anyway
• Making retirement plan contributions before year-end
• Paying outstanding vendor invoices before December 31

Deferring income might look like:

• Delaying December invoices so payment arrives in January
• Timing the close of a large project or contract

This isn't about gaming the system — it's about using the timing flexibility that already exists in the tax code.

If your business needs equipment, vehicles, or technology, the timing of that purchase matters. Section 179 allows you to deduct the full cost of qualifying assets in the year they're placed in service, rather than depreciating them over several years.

Bonus depreciation works similarly and has historically allowed 100% first-year deductions on qualifying property. The rules change periodically, so it's worth confirming current limits with your advisor before making a large purchase.

The key point: buying a $30,000 piece of equipment in December can have a very different tax outcome than buying it in January.

Retirement contributions are one of the most powerful tax levers available to small business owners. Depending on your plan structure, you may be able to contribute — and deduct — a significant amount before year-end.

Common options include:

• SEP-IRA: Simple to set up, contributions can be made up to the tax filing deadline (including extensions). Contribution limits are generous.
• Solo 401(k): Higher contribution limits if you have no employees. Requires the plan to be established by December 31, though contributions can be made later.
• SIMPLE IRA: Good option if you have employees. Lower contribution limits but straightforward administration.

If you don't have a retirement plan in place, now is the time to look at it — not just for the tax benefit, but for your own financial future.

Your business structure — sole proprietor, S-corp, LLC, C-corp — has a direct impact on how your income is taxed. This isn't a set-it-and-forget-it decision.

As your revenue grows, the structure that made sense at $200K may not be optimal at $800K. S-corp elections, in particular, can create meaningful self-employment tax savings for profitable businesses — but they come with administrative requirements and need to be evaluated carefully.

If you haven't revisited your entity structure in the last few years, it's worth a conversation.

If your business sells products — especially online — sales tax is an area that catches many small businesses off guard. Economic nexus laws, which were established after the 2018 South Dakota v. Wayfair Supreme Court decision, mean you may have sales tax filing obligations in states where you've never set foot.

The thresholds vary by state, but many trigger at $100,000 in sales or 200 transactions. If you're selling across state lines and haven't evaluated your nexus exposure, this is a risk worth addressing proactively. Penalties and back taxes can add up quickly.

The businesses that manage their tax burden most effectively don't wait until December. They review their financial position quarterly — adjusting estimated tax payments, evaluating timing decisions, and flagging issues before they become problems.

A quarterly business review with your financial advisor should include a tax projection alongside your P&L and cash flow review. That way, there are no surprises in April.

Tax planning isn't about finding loopholes. It's about understanding the rules, knowing your numbers, and making intentional decisions throughout the year. The businesses that do this consistently keep more of what they earn — and sleep better in March.

If you're not sure where your business stands heading into year-end, that's a good place to start. A clear picture of your current reality is the first step toward a better plan.

David Biel is a CPA, CMA, and MBA with 18+ years of finance and accounting experience. North Arrow Financial provides fractional CFO and controller services for small businesses with $500K–$2M in revenue.

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• Managing Cash Flow During a Crunch — When cash gets tight, here's the framework to manage through it and prevent it from happening again.
• How to Prepare Your Books for an Acquisition — Clean books aren't just for tax season — they're what buyers look for when they come calling.
• When Does a Small Business Need a Fractional CFO? — If you're asking whether you need a fractional CFO, you probably do. Here's how to know for sure.