How to Cut Your 2026 Tax Bill in 5 Minutes (4 Year-End Moves Still Legal Before December 31)

Five minutes is enough to read this field guide, not to complete your tax plan. The decisions below can often be made quickly. Their value comes from making them deliberately, with current books and a clear view of cash, before December 31, not discovering the options in April.

For established entrepreneurs, consultants, coaches, and real estate professionals, these are ordinary, legal tax-planning strategies that are routinely missed. The goal is not to spend money simply to claim a deduction. It is to align business decisions, tax timing, and cash reserves so today's choices support long-term profitability.

The Four Year-End Moves

1. Decide on Equipment and Vehicle Purchases Before December 31

The One Big Beautiful Bill Act (OBBBA) restored 100% bonus depreciation permanently for eligible property acquired and placed in service after January 19, 2025. Section 179 expensing remains available. The law raised its statutory limit to $2.5 million, with a $4 million phase-out threshold; inflation adjustments affect the 2026 figures, so confirm the applicable limit against final IRS forms and instructions.

A deduction may reduce taxable income, but it does not make a purchase free. A computer, equipment upgrade, or business vehicle that you already planned to buy in early 2027 may deserve a December purchase if the business case and cash position support it.

Before acting, check:

• Does the business genuinely need the asset?
• Can you pay for it without weakening operating reserves or delaying other priorities?
• Will it be acquired and placed in service by year-end, and does it qualify?
• What deduction timing is actually available given business use, vehicle limits, and your tax position?

The IRS explains the additional first-year depreciation rules in its guidance on bonus depreciation.

Cash-flow angle: The cash leaves now. The tax benefit may be less than the purchase price, and its timing depends on your circumstances. Buy for the business, not for the deduction.

2. Maximize Retirement Contributions While There Is Still Runway

Retirement contributions can serve both a long-term wealth-building plan and a current-year tax strategy. Self-employed owners may consider options such as a solo 401(k) or SEP-IRA, but plan rules and deadlines differ.

For 2026, the IRS announced a $24,500 employee elective-deferral limit for 401(k) plans. Catch-up limits may also apply: $8,000 for eligible participants age 50 and older, and $11,250 for those ages 60 through 63 under SECURE 2.0. These figures are not the same as your total allowable contribution; employer contributions and other limits matter. Review the IRS's 2026 retirement plan contribution limits.

If you planned to start a plan "next year," look into it now. A solo 401(k) generally needs to be established by December 31 to make 2026 employee deferrals. Employer contributions may generally be made by the business's tax filing deadline, subject to plan rules. SEP-IRA timing can differ. Confirm the plan setup and contribution deadlines with your plan provider or tax professional before relying on them.

Before acting, check the plan type, your eligibility, contributions already made to other plans, applicable limits, and the cash available before year-end.

Cash-flow angle: Retirement contributions belong in your cash plan, not as an April surprise. Fund the future without putting current operations under pressure.

3. Time Income and Deductible Expenses Between December and January

If your business uses the cash method of accounting, the timing of collected income and paid expenses can affect which tax year they fall into. For many service businesses, December invoicing, payment collection, and eligible expense timing deserve a deliberate review.

Depending on your accounting method and the rules that apply, you may be able to accelerate eligible business expenses, such as supplies or certain prepaid expenses, or defer income that has not yet been received. For real estate professionals, consider commission timing, staging and marketing spend, and license or MLS renewals. Any timing decision must reflect the facts and applicable tax rules; an invoice cannot simply be moved to January because that is more convenient.

Before acting, check your accounting method, whether the expense is deductible when paid, whether the client is likely to pay in December, and what your January cash needs look like. Keep invoices and payment records.

Cash-flow angle: Deferring an invoice may defer the cash too. Do not delay collection of income you need to cover January payroll, debt service, or essential operating costs. Tax planning should strengthen liquidity, not trade it away.

4. Fix Estimated Tax Shortfalls Now, Not in April

The fourth-quarter estimated tax payment for 2026 is generally due January 15, 2027. Underpayment penalties under IRC Section 6654 are calculated by period. A payment in April cannot automatically erase a shortfall from an earlier quarter.

November and December give you time to project the year's tax position, account for the decisions above, and reserve funds for the remaining payment. A common federal safe harbor is to pay at least 90% of the current-year tax or 100% of the prior-year tax, whichever is smaller. For certain higher-income taxpayers, the prior-year amount generally rises to 110%. The detailed rules depend on your circumstances; see the IRS's Publication 505 and 2026 Form 1040-ES.

Your projection also needs to reflect the current law. The OBBBA made the Section 199A qualified business income (QBI) deduction permanent and raised the state and local tax deduction cap to $40,000 for 2026, subject to applicable limits and phase-down rules. These changes may affect the math for business owners, but they do not guarantee a lower tax bill. Projections built on old assumptions need refreshing.

Before acting, compare your prior-year safe-harbor amount with a current-year projection, account for withholding and payments already made, and confirm how much cash is actually reserved.

Cash-flow angle: Your tax reserve account is doing its job. Committed cash is not available cash.

Your November Field Notes

Before December 31, bring together your year-to-date books, projected income, current tax payments, planned purchases, retirement contributions, and cash commitments. Review them as one plan, not as four disconnected deductions.

This is where proactive tax planning becomes an operating advantage. A deduction that reduces taxable income may also affect cash, retirement funding, or another tax calculation. The right decision is the one that fits the full picture of your business.

Build a Stronger Year-End Plan

Year-end tax strategy is exactly what a proactive tax planning engagement is designed to support. Bring your books to a Cash Flow & Tax Analysis conversation, and we can identify the questions your numbers need to answer before the year closes.

For a structured starting point, explore the Profit SEEN™ Workbook. Clearer financial visibility today can support more profitable decisions, and a stronger foundation for the future.