5 Year-Round Tax Moves That Beat Last-Minute Filing

Most people treat taxes like a bill that arrives once a year — something to deal with in March or April. The problem with that mindset is that most of the decisions that determine your tax bill happen throughout the year, not during filing season.

By the time you sit down with your accountant in March, the prior year is closed. The best you can do is document what happened. Proactive planning, by contrast, lets you make real decisions — accelerating deductions, timing income, choosing retirement contributions — before the year ends.

If you are a business owner or self-employed, you should be making quarterly estimated tax payments (due April, June, September, and January). But many owners simply pay what they paid last year — the "safe harbor" approach — without checking whether their actual situation has changed.

If your income went up significantly, safe harbor payments may mean a large balance due in April. If it went down, you are giving the IRS an interest-free loan. A quarterly review with your advisor takes 30 minutes and ensures your payments match your actual projected liability.

The IRS allows business owners to contribute significant amounts to tax-advantaged retirement accounts — up to $69,000 per year in 2024 through a Solo 401(k) or SEP-IRA, with additional catch-up contributions for those 50 and older.

Most business owners make these contributions in April when they file — but that is the latest possible date, not the optimal one. Contributing throughout the year reduces your taxable income in real time, allows your investments to compound longer, and removes the risk of forgetting entirely.

Deductible business expenses are only valuable if you can prove them. A shoebox of receipts in March is not a tax strategy — it is a liability. Missed deductions and disallowed expenses both hurt your bottom line.

Set up a system at the beginning of the year: a dedicated business credit card, a simple accounting tool (QuickBooks, Wave, or even a well-organized spreadsheet), and a monthly 15-minute review to ensure transactions are categorized correctly. This makes filing faster, reduces errors, and ensures you never miss a legitimate deduction.

If you have taxable investment accounts, tax-loss harvesting — selling positions at a loss to offset capital gains — is most effective when done throughout the year, not just in December.

Market volatility creates opportunities. When a position in your portfolio drops significantly, selling it to realize the loss and immediately buying a similar (but not identical) security to maintain your market exposure can generate valuable capital loss deductions without changing your investment position meaningfully.

This strategy requires careful attention to the "wash sale" rules, which prohibit claiming a loss if you buy the same or substantially identical security within 30 days before or after the sale.

Your business is not static, and neither is the tax code. The structure that was right when you launched — a single-member LLC, for instance — may no longer be optimal as your revenue grows, your team expands, or your personal financial situation changes.

An annual structure review with your tax advisor is one of the highest-leverage things you can do. It typically surfaces opportunities to elect S-Corp status, create a holding company, restructure compensation, or take advantage of deductions you did not know were available.

The best time to make these changes is before the tax year begins. That means the review should happen in Q4, not April.