4 Smart Moves to Cut Your 2025 Tax Bill Under New Rules

The One Big Beautiful Bill Act passed in July 2025, made some long-awaited permanent changes to the tax code. But as we approach the end of the year, our focus must shift to the new, temporary provisions—the parts of the law that offer short-term tax breaks but come with strict limits and phaseouts. These are the areas where smart, timely planning can make a real difference to your 2025 tax bill.

Remember, many of these benefits are only available through 2028 or 2029, so now is the time to act. Here are four steps you can take today to get the most out of the OBBBA’s temporary provisions.

1. Don’t Automatically Dismiss Itemizing Your Deductions

For many years, most taxpayers benefited from simply taking the standard deduction, thanks to its high amount. However, the OBBBA includes a temporary boost to the State and Local Tax, or SALT, deduction cap, which now stands at an elevated $40,000 (for both married couples filing jointly and single filers), up from the original $10,000 limit. This higher cap applies from 2025 through 2029.

Your Action Steps:

Run the numbers

For 2025, the standard deduction is $31,500 for married couples and $15,750 for singles. If your total itemized deductions—including mortgage interest, charitable giving, and state and local taxes (up to the new $40,000 cap)—add up to more than your standard deduction, you should itemize your deductions.

A Word of Caution: Watch Your Income

The new $40,000 SALT cap isn’t for everyone. It begins to phase out if your modified adjusted gross income is over $500,000 (for all filers). If your MAGI reaches $600,000, your SALT deduction is capped back at the original $10,000 limit. If you’re near that $500,000 threshold, be careful about realizing large capital gains or executing a large Roth conversion this year, as the extra income (known as the “SALT torpedo”) could eliminate the benefit entirely.

2. Maximize the New Targeted Deductions—If You Qualify

The OBBBA introduced several new, temporary above-the-line deductions (available whether you itemize or take the standard deduction) specifically designed to help middle-income workers. These are not tax-free windfalls—they have very strict income and benefit limits you must be aware of to maximize the benefit.

The Qualified Overtime Pay Deduction

This deduction is available for “qualified overtime compensation” and is capped at $25,000 for married couples filing jointly and $12,500 for singles. Crucially, you must understand how to calculate the benefit: Only the extra “half-time” portion of your time-and-a-half pay qualifies for the deduction, not the full overtime hourly rate. This benefit is designed to target middle-income earners; for a married couple, it begins to disappear if your MAGI hits $300,000 and is entirely gone once your MAGI reaches $550,000.

The Qualified Tips Income Deduction

This deduction allows you to write off qualified tip income up to $25,000 per tax return, regardless of whether you file as married or single. The main planning takeaway here is ensuring proper reporting. The deduction is only available for tips that are formally reported to your employer on a Form W-2 or the appropriate Form 1099 for contractors. Like the overtime deduction, this break phases out sharply for higher earners, starting at a MAGI of $300,000 for married couples and $150,000 for singles, and is fully eliminated at $550,000 and $400,000, respectively.

The Auto Loan Interest Deduction

This provision introduces a temporary, above-the-line deduction for interest paid on certain car loans, capped at $10,000. The most important thing to verify is that your vehicle meets the specific criteria. It must be interest on a loan for a new, personal-use vehicle with final assembly in the United States. Leased vehicles are explicitly excluded. This deduction is aimed at taxpayers with lower MAGI, starting to phase out at $200,000 for married couples and $100,000 for singles, and is completely gone by $250,000 for married filers and $150,000 for singles.

3. Seniors, Time Your Roth Conversions Carefully

If you are 65 or older, the OBBBA offers a new, temporary deduction for seniors of up to $12,000 for married couples ($6,000 per eligible spouse) and $6,000 for single filers. This is a very welcome tax break, but it’s fragile.

Your Action Steps:

Beware the MAGI Trap

This deduction is targeted, meaning it’s quickly phased out. It begins to disappear for married couples with a MAGI over $150,000 and for singles over $75,000.

Model Roth Conversions

If you are a senior who is close to the $150,000 MAGI limit, a large Roth conversion could easily push your income over the threshold, causing you to lose this entire $12,000 deduction. Work with your advisor to model any planned conversions to ensure the cost of losing the deduction doesn’t outweigh the long-term benefit of the Roth conversion. In some cases, waiting until 2026 for a large conversion could save you thousands on your 2025 return.

4. Optimize Income to Qualify for the Best Breaks

Many of the OBBBA’s most valuable, temporary provisions are income-sensitive, particularly those new targeted deductions and the elevated SALT cap. The bottom line is that for many taxpayers, keeping your MAGI below the phaseout thresholds is the single most important action you can take to lower your 2025 tax bill.

Your Action Steps:

Control What You Can

If you are nearing any of the income phaseouts (like the $300,000 for tips/overtime, or the $500,000 for the elevated SALT cap), consider deferring income until 2026. This might include:

• Postponing the sale of highly appreciated stock to avoid a large capital gain.
• Delaying the exercise of nonqualified stock options.
• Maximizing your 401(k) and health savings account contributions to reduce your current-year MAGI.
• Holding off on large Roth conversions.

A proactive approach to these expiring OBBBA provisions is essential for year-end. Don’t let the technical limitations and phaseouts catch you by surprise—with a little planning now, you can lock in significant savings for 2025.