5 Ways High-Income Families Can Cut Their Tax Bill Before December 31

ByMichael

Ever wonder why your tax bill feels like a bad punchline?
Do you max out your 401(k), pay estimates on time, and still get walloped every April?

Here’s the truth: most families leave thousands on the table — not because they’re doing anything wrong, but because no one showed them the moves that actually matter. The good news? You’ve still got time before December 31 to change your outcome.

1. Max Out Your Retirement Savings (the Right Way)

Last year, one family we work with waited until April to review their 401(k). By then, it was too late to lower their tax bill. Another family reviewed their contributions in October, made the adjustment before year-end, and had extra cash for a spring break trip.

Your move:

  • Check your contributions now. Don’t assume you’re maxed.
  • Hit the 2025 employee deferral limit of $23,500 (if you’re under 50).
  • Add the $7,500 catch-up if you’re 50+, or the $11,250 special catch-up if you’re 60–63 (bringing the total to $31,000 or $34,750).
  • Side hustle? Open a Solo 401(k) or SEP. (Solo 401(k)s must be set up by Dec. 31; SEPs can often be opened and funded by the tax filing deadline. Ask HR if your plan allows after-tax contributions with a Roth conversion — a “mega backdoor Roth” can be a huge win.)

But if you wait until April, all you can do is write the check. So do it now while it still counts.

2. Turn Your HSA Into a Retirement Machine

Many high earners use their HSA solely for medical expenses. The missed opportunity? When funded and invested, it becomes one of the most powerful stealth retirement accounts available.

Your move:

  • Contribute the 2025 max: $4,300 individual / $8,550 family (+$1,000 if 55+).
  • Pay current expenses out-of-pocket and let your HSA grow.
  • Invest your HSA balance instead of letting it sit in cash.
  • Save receipts — you can reimburse yourself tax-free anytime.

Think of it this way: a family in the 32% bracket saves $2,736 in taxes this year and builds a future nest egg.

3. Bunch Your Giving for Maximum Impact

Instead of giving the same amount every year, one household stacked three years of donations into a single year. The result? Bigger deductions today, standard deduction the next two years, and thousands saved in taxes.

Your move:

  • If you’re close to the $31,500 standard deduction (married filing jointly), bunch 2–3 years of giving.
  • Donate appreciated stock instead of cash.
  • Use a donor-advised fund to simplify.

You were going to give anyway. Why not give smarter?

4. Don’t Overlook the “Hidden” Deductions

When we showed a busy professional with a side gig how to start tracking mileage and home office expenses, they uncovered thousands in deductions that had been slipping through the cracks every year.

Your move:

  • Track side-business expenses: home office, mileage, education.
  • Keep good records — the IRS loves receipts.
  • Max out retirement accounts tied to your business income.
  • Don’t forget SALT (state and local tax) payments, up to the current limits.

If you have any side income, you have deductions waiting. Don’t ignore them.

5. Don’t Wait Until April

Every April, families drop their documents with their CPA, expecting a miracle. By then, it’s too late. The households who start in October and November? They save real money before the year closes.

Your move:

  • Schedule a year-end planning call with your CPA — we’d love to be yours.
  • Review contributions, giving strategies, and income timing now.
  • Explore education, childcare, and healthcare savings options before year-end.

Tax planning isn’t about one “magic” deduction. It’s about timing and coordination. The families who save the most aren’t the ones with the fanciest returns; they’re the ones who start before the year is over.

Why December Matters More Than April

By Tax Day, all the doors are closed. The truth is, tax savings don’t happen in April. They happen before December 31st. Your 2025 tax bill isn’t set in stone until the ball drops in Times Square.

So ask yourself: are you building your own wealth, or funding the IRS’s?

We help high-earning families uncover these strategies every year before it’s too late.

Book your year-end planning call today.

Because the best time to save on taxes was six months ago.

The second-best time is right now.

Become a New Client

—T/CO Team

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