Don't wait for April: slash your tax bill before December 31st

Most business owners wait until April to think about taxes. By then, your options are limited to reporting historical numbers rather than actively changing them. True tax optimization happens before December 31st, while your business transactions for the tax year are still open. Taking deliberate steps in the final quarter gives you control over your taxable income, state-level exposure, and retirement contributions.

Whether you operate an owner-managed service business, a medical practice, or a portfolio of residential rental properties, implementing strategic decisions before midnight on December 31st can make a measurable difference in your overall tax liability. Here are three critical year-end tax planning strategies every small business owner and landlord should evaluate.

1. Accelerate Business Expenses and Capital Purchases

Under cash-method accounting, expenses are generally deductible in the tax year they are paid. If your business needs equipment, technology upgrades, or repairs to real estate properties, finalizing those purchases prior to December 31st allows you to claim the deduction on your upcoming return.

For capital assets such as vehicles, machinery, or office hardware, section 179 property rules permit businesses to deduct the full purchase price of eligible equipment in the year it is placed in service, rather than depreciating it over several years. To qualify, the asset must be acquired and fully operational by December 31st; placing an order without receiving or setting up the equipment does not meet IRS requirements.

Landlords should also review property repairs versus capital improvements. Accelerating scheduled maintenance, safety inspections, or minor repairs before year-end can lower net rental income for the current year while keeping rental units in prime condition.

2. Maximize Retirement Plan Setup and Contributions

Retirement accounts offer one of the most effective ways to convert current income into long-term wealth while lowering present taxable income. However, timing and plan structure matter significantly.

If you are a solo owner or operate with a spouse, setting up a Solo 401(k) before December 31st enables you to make employee elective deferrals for the current year. While actual cash funding for employer contributions can often extend into the tax filing deadline, the account establishment documentation must be legally signed by December 31st.

For businesses with non-owner employees, alternative structures such as SEP IRAs or SIMPLE IRAs require careful evaluation regarding employer match obligations and eligibility rules. Landlords operating through an active real estate management entity may also qualify for retirement plan tax benefits depending on how their entity structure is designed. Establishing these retirement channels early ensures you do not miss strict IRS adoption deadlines.

3. Optimize S-Corp Reasonable Compensation and State PTET Elections

For business owners operating as an S-Corporation, year-end requires a detailed review of owner-employee compensation. The IRS requires S-Corp shareholders who perform services to pay themselves a "reasonable salary" subject to W-2 payroll taxes before taking distributions.

If your distributions significantly outpace your payroll compensation, year-end is your last window to run a supplemental payroll and align your salary with IRS benchmarks. Failing to address reasonable compensation can trigger payroll tax audits, penalties, and interest.

Additionally, small business owners in states with high local taxes—such as New Jersey and New York—should evaluate the Pass-Through Entity Tax (PTET) election. Programs like New Jersey's Business Alternative Income Tax (BAIT) allow pass-through entities (S-Corps and Partnerships) to pay state income tax at the entity level rather than the individual level. This creates a fully deductible business expense on your federal return, effectively bypassing the federal $10,000 SALT deduction cap. Because PTET elections and required estimated payments often carry firm year-end deadlines, proactive coordination is vital.

What to do next

Tax planning is not a one-size-fits-all checklist. The right combination of expense acceleration, retirement funding, and entity tax elections depends on your cash flow, owner structure, and multi-year financial goals.

If you want to ensure your business is fully optimized before December 31st, contact Andrew Chen CPA LLC at (908) 660-0090 or email Andy@andrewchencpa.com to schedule a year-end strategy consultation.