​Last-Minute Tax Moves (That Can Still Help) When You’re Feeling the Pressure

If tax season has you thinking, “I wish I’d started earlier,” you’re in good company. We hear that every year from smart business owners who are juggling clients, payroll, vendors, and real life.

The good news: depending on your situation, there may still be a few legitimate levers you can pull before you file. None are magic, though. But they can reduce taxes, prevent mistakes, and keep you from leaving money on the table.

Here are four practical “last-minute” moves to consider.

1) Maximize retirement contributions (if the deadline still allows it)
Retirement contributions can be a powerful way to reduce taxable income—but the deadline depends on the type of account.

Traditional or Roth IRA: The IRS states the deadline is your tax return filing deadline (not including extensions). (So if you file an extension, that doesn’t extend the IRA contribution deadline.)

SEP IRA: SEP contributions can generally be made by the due date of your return, including extensions.

Solo/One-participant 401(k): Contribution timing can vary based on plan rules (and whether you’re talking “employee deferrals” vs. “employer” contributions). IRS guidance on one-participant plans covers how they work and limits, but your provider/plan document often determines the operational steps.

Real-life example: If you had a stronger profit year than expected, a SEP IRA contribution made within the allowed window may reduce the income that gets taxed (and boost long-term savings).

2) Re-check deductible expenses (because “miscategorized” is the new “missing”)

Many missed deductions aren’t fake deductions—they’re real expenses that never got properly captured such as:

• software subscriptions
• payment processing fees
• continuing education
• supplies
• professional services
• legitimate business mileage (if tracked)

A quick but effective approach would be to scan bank + credit card statements for the year, then 
compare them to what’s in your bookkeeping system, and flag anything business-related that landed in “uncategorized,” “owner draw,” or the wrong bucket.

This doesn’t mean “get aggressive.” though, it is more about looking under every stone to save the most money possible.

3) Fund an HSA (if you’re eligible)
HSAs can be extremely tax-friendly, but eligibility matters. To contribute, the IRS says you generally must:

• be covered under a qualifying high deductible health plan (HDHP)
• have no disqualifying additional coverage
• not be enrolled in Medicare
• not be someone else’s dependent
• And the IRS states you can typically make HSA contributions for a tax year through the tax filing deadline for that year (example shown in Pub. 969).

Also note: the IRS announced that starting Jan 1, 2026, certain Marketplace bronze and catastrophic plans are treated as HSA-compatible under new guidance—so eligibility may be broader for some people than in prior years.

4) Confirm your estimated tax payments and credits are actually showing up
This is the quiet one that causes totally avoidable frustration: you paid—but the return doesn’t reflect it correctly.

The IRS instructions are clear that estimated payments should be reported on Form 1040 (and you can include prior-year overpayments applied forward).

So before you hit “file”:

• reconcile quarterly payments against your IRS payment history/records
• confirm the amounts are applied to the correct year and taxpayer
• make sure you’re getting credit for every dollar you already paid

One more “unsexy” step that prevents a lot of pain: Before filing, double-check that you have put the correct:

• SSN/EIN
• legal business name spelling
• bank account/routing (especially if you’re getting a refund or paying electronically)
• address and email accuracy

Small errors can trigger delays, notices, or misapplied payments.

But if you're looking for the biggest possible impact you need to focus on year-round planning with your team of experts.

Last-minute savings can help. But the real relief comes from clean books and current numbers—because that’s when you have options before deadlines.

If you want a second set of eyes on your numbers (and a clear plan for the year ahead), that’s exactly what we do.