The countdown to Tax Day is on, and if you’re like many retirees I work with here in Pasadena, you might be thinking it’s too late to do anything meaningful about your 2025 tax bill. Here’s the good news: April 15th isn’t just a deadline; it’s also an opportunity. Several important tax planning moves for retirees can still be made right up until Tax Day, and some of these strategies could save you thousands of dollars.

After more than 35 years of helping families navigate retirement planning in California, I’ve learned that the weeks before Tax Day often separate those who pay unnecessary taxes from those who make their money work smarter. The difference isn’t luck or insider knowledge. It’s simply understanding which last-minute tax moves are still available and how to use them strategically.

In this guide, I’ll walk you through five concrete actions California retirees can take before April 15th to optimize their tax situation. These aren’t complicated maneuvers that require an army of accountants. They’re straightforward strategies that, when applied thoughtfully, can reduce your tax burden and keep more money in your retirement accounts where it belongs.

Move #1: Maximize Your IRA Contribution (Even for 2025)

Here’s something that surprises many retirees: you have until April 15, 2026, to make IRA contributions that count toward your 2025 tax year. This extended deadline gives you a powerful planning opportunity that most people overlook.

For 2025, if you’re 50 or older, you can contribute up to $8,000 to a traditional IRA ($7,000 base contribution plus $1,000 catch-up contribution). If you haven’t maxed this out yet, you still have time. Even if you filed your tax return already, you can amend it to claim this deduction.

Let’s look at how this works in practice. Suppose you’re a married couple in Pasadena with $120,000 in combined retirement income. You’re in the 22% federal tax bracket and California’s 9.3% state bracket. If both of you max out your traditional IRA contributions before April 15th, that’s $16,000 in deductions. Your combined federal and state tax savings? Roughly $5,008. That’s real money staying in your pocket instead of going to Sacramento and Washington.

Now, there are income limits that phase out your ability to deduct traditional IRA contributions if you or your spouse are covered by a retirement plan at work. For 2025, if you’re married filing jointly and covered by a workplace plan, the deduction phases out between $126,000 and $146,000 of modified adjusted gross income. But here’s where it gets interesting: even if you can’t deduct the contribution, you might still consider making a non-deductible contribution and then immediately converting it to a Roth IRA (what’s often called a “backdoor Roth”). This strategy works particularly well for California retirees looking to build tax-free income for later years.

One important consideration: make sure you have earned income. You need compensation equal to or greater than your IRA contribution. If you’re fully retired with no earned income, this strategy won’t work. However, if you have any consulting income, part-time work, or even self-employment income from a small business, you’re eligible.

The mechanics are simple. Contact your IRA custodian (Fidelity, Vanguard, Schwab, or wherever you hold your account) and specify that you want this contribution applied to tax year 2025. Don’t assume it will automatically go to 2025 if you’re making it in 2026; you must designate the year. Most custodians have a straightforward process, often just checking a box on the contribution form.

Move #2: Fund Your Health Savings Account While You Can

If you’re under 65 and covered by a high-deductible health plan (HDHP), a Health Savings Account represents one of the best tax deals available to California retirees. Like IRAs, you have until April 15th to make HSA contributions for the previous tax year.

For 2025, contribution limits are $4,300 for individual coverage and $8,550 for family coverage. If you’re 55 or older, add another $1,000 catch-up contribution. These contributions are tax-deductible at both the federal and state level in California, which is powerful given our state’s high tax rates.

Here’s why HSAs are particularly valuable for retirees: they offer triple tax benefits. Your contributions are tax-deductible, the money grows tax-free, and withdrawals for qualified medical expenses are tax-free. No other retirement account offers this trifecta. Even Roth IRAs, which grow tax-free and distribute tax-free, don’t give you a deduction going in.

I often see pre-retirees in Pasadena miss this opportunity. They think of HSAs as just spending accounts for current medical expenses, when really they’re incredible retirement savings vehicles. If you can afford to pay your current medical expenses out of pocket, let your HSA grow. You can reimburse yourself for those expenses years or even decades later, tax-free. There’s no time limit on reimbursement as long as you keep your receipts.

A quick example: suppose you’re 60, still working part-time with HDHP coverage, and you contribute the maximum $5,300 to your HSA before April 15th (individual coverage plus catch-up). You’re in the 24% federal bracket and California’s 9.3% bracket. Your tax savings: approximately $1,765. Over time, that money can grow tax-free and eventually cover healthcare costs in retirement, which, let’s be honest, tend to be substantial.

One important note: once you enroll in Medicare (typically at 65), you can no longer contribute to an HSA. But you can still use the funds you’ve accumulated for qualified medical expenses, including Medicare premiums (though not Medicare Supplement premiums). This is why I encourage clients in their early 60s to maximize HSA contributions while they’re still eligible.

If you’re not sure whether your health plan qualifies as an HDHP, check your plan documents or ask your benefits administrator. For 2025, an HDHP is defined as having a minimum deductible of $1,650 for individual coverage or $3,300 for family coverage.

Move #3: Bunch Your Charitable Contributions Strategically

With the standard deduction at $30,000 for married couples filing jointly in 2025 ($15,000 for singles), many California retirees find themselves in a situation where they don’t have enough itemized deductions to make itemizing worthwhile. This is where charitable bunching comes in, and you can still implement it before Tax Day.

Bunching means consolidating multiple years’ worth of charitable giving into a single year to exceed the standard deduction threshold, then taking the standard deduction in the following years. If you regularly give to charity anyway, this strategy simply rearranges the timing to maximize your tax benefit.

Here’s how it works in practice. Let’s say you’re a Pasadena couple who normally gives $10,000 per year to your church, local charities, and alma mater. You have $12,000 in state and local taxes (SALT), which is capped at $10,000 federally, and $8,000 in mortgage interest. Your total itemized deductions would normally be $28,000, which is less than your $30,000 standard deduction. You’re leaving money on the table.

Instead, bunch two or three years of charitable giving into 2025. Give $20,000 or $30,000 before April 15th. Now your itemized deductions jump to $38,000 or $48,000, well above the standard deduction. You itemize in 2025 and save thousands in taxes, then take the standard deduction in 2026 and 2027 when you’re not making large charitable gifts.

The most elegant way to implement this strategy is through a donor-advised fund (DAF). You contribute a large sum to the DAF before April 15th, get the immediate tax deduction, and then distribute the money to your favorite charities over the next several years. The DAF sponsors (Fidelity Charitable, Schwab Charitable, etc.) handle all the paperwork, and you retain full control over which charities receive grants and when.

California retirees have an added advantage here: if you have highly appreciated stock or other securities, you can donate those directly to your DAF or to charity. You avoid paying capital gains tax on the appreciation (both federal and California’s 9.3% or higher state capital gains rate) and you get a deduction for the full fair market value of the securities. This can be especially powerful if you bought stocks decades ago that have substantial embedded gains.

One client here in Pasadena used this strategy with stock she’d held since the 1990s. She had $50,000 in shares with a cost basis of only $10,000. If she’d sold the shares, she’d have owed about $9,520 in combined federal and California capital gains taxes on the $40,000 gain. Instead, she donated the shares directly to her donor-advised fund, avoided the capital gains tax entirely, and received a $50,000 charitable deduction. The total tax benefit was substantial.

Important caveat: make sure you’ve held the securities for at least one year to qualify for long-term capital gains treatment. And remember, you need to actually itemize to benefit from charitable deductions, which is why bunching is so powerful for retirees who hover around that standard deduction threshold.

Move #4: Review and Adjust Your Quarterly Estimated Tax Payments

If you’re receiving retirement income beyond Social Security (pension, IRA withdrawals, rental income, consulting fees), you likely need to make quarterly estimated tax payments. The fourth quarter payment for 2025 is due on April 15, 2026, the same day as your tax return.

This is your last chance to true-up your 2025 tax liability and avoid underpayment penalties. The IRS generally expects you to pay either 90% of your current year’s tax liability or 100% of last year’s tax liability through withholding and estimated payments (110% if your adjusted gross income was over $150,000). If you fall short, you could face penalties.

Here’s the strategic opportunity: review your 2025 tax projection carefully. If you’re going to owe more than expected, make a larger Q4 estimated payment before April 15th. The IRS treats estimated payments as if they were made evenly throughout the year, even if you make the entire payment on the deadline. This can help you avoid or minimize underpayment penalties.

I see this situation frequently with Pasadena retirees who’ve had unexpected income during the year. Maybe you sold some investments and realized more capital gains than anticipated. Perhaps you took a larger IRA distribution than planned. Or maybe you had a one-time consulting project. Whatever the reason, if your income was higher than expected, your estimated payments might be too low.

Conversely, if you paid too much in estimated taxes, you’ll get a refund. While getting money back feels good, it means you gave the government an interest-free loan all year. You could have had that money working for you. For next year, adjust your quarterly payments to more accurately match your actual tax liability.

California requires separate estimated tax payments, and California’s underpayment penalty rate can be even steeper than the federal rate. Make sure you’re addressing both your federal and state obligations. Many retirees focus on federal taxes and forget about California until it’s too late.

If you have wage income in retirement (even part-time work), you might be able to increase your tax withholding from wages instead of making estimated payments. The advantage? Withholding is treated as paid evenly throughout the year regardless of when it actually happens. So if you increase your withholding in late March or early April, it can still help cover underpayment issues from earlier in the year. Estimated payments don’t get this same favorable treatment.

One practical note: use IRS Form 1040-ES for federal estimated taxes and Form 540-ES for California. Both can be paid online through the respective tax authority websites (IRS Direct Pay or California FTB Web Pay). Keep records of all payments.

Move #5: Harvest Capital Losses to Offset Gains

If you have investments in taxable brokerage accounts, April 15th is your absolute deadline to review your 2025 capital gains and losses and make final adjustments. While tax-loss harvesting is most commonly done in December, you can still identify losing positions and use those losses strategically.

Capital losses offset capital gains dollar-for-dollar. If your losses exceed your gains, you can deduct up to $3,000 of the excess against ordinary income ($1,500 if married filing separately). Any remaining losses carry forward to future years indefinitely.

Here’s a scenario I see often with retirees in the Pasadena area: you took profits on some tech stocks earlier in 2025 and realized $15,000 in long-term capital gains. You’re facing about $4,740 in combined federal and California taxes on those gains (assuming you’re in the 15% federal long-term capital gains bracket and California’s 9.3% bracket).

Looking through your portfolio now, you notice you have some positions that are underwater. Maybe you bought some bonds when interest rates were lower, and they’ve declined in value. Or perhaps you have an old mutual fund position that hasn’t performed well. You could sell those losing positions, realize the losses, and offset some or all of your capital gains. If you have $15,000 in losses to match the $15,000 in gains, you’ve just eliminated that $4,740 tax bill.

The key is to be strategic and avoid the wash-sale rule. If you sell a security at a loss and buy substantially identical securities within 30 days before or after the sale, the loss is disallowed. The IRS is watching for this, and it’s one of the most common mistakes I see retirees make.

However, you can sell a losing position and immediately buy something similar but not substantially identical. For example, if you sell an S&P 500 index fund at a loss, you could immediately buy a total market index fund. They’re similar but not identical. Or you could wait 31 days and buy back the exact same fund if you really want to own it.

This strategy requires looking at your entire financial picture, not just individual accounts. If you’re married and you and your spouse have separate accounts, remember that the wash-sale rule applies across both accounts. You can’t sell a losing position in your account and have your spouse buy it in theirs within the 30-day window.

One more California-specific consideration: California taxes capital gains as ordinary income, which means your rate could be as high as 13.3% if you’re in the top bracket. This makes tax-loss harvesting particularly valuable for California retirees. Every dollar of capital gains you can offset with losses saves you both federal and state taxes.

If you’ve already filed your 2025 return and later realize you missed tax-loss harvesting opportunities, you can’t go back and change last year. But you can implement this strategy prospectively. Consider working with your financial advisor to establish a systematic tax-loss harvesting process for future years. Many modern portfolio management platforms can do this automatically throughout the year, identifying opportunities as they arise rather than waiting until the last minute.

California-Specific Tax Considerations for Retirees

California’s tax code has some unique provisions that create both challenges and opportunities for retirees. Since we’re based here in Pasadena, it’s worth highlighting a few Golden State-specific considerations as Tax Day approaches.

First, California doesn’t allow you to deduct your federal income taxes on your state return, unlike some states. This means you’re paying state tax on income that includes your federal tax payment, creating a sort of double-taxation effect that can be painful for high-income retirees.

Second, California is one of the few states that taxes Social Security benefits indirectly. While your Social Security isn’t directly taxable at the state level, California includes it in your adjusted gross income calculation, which can push you into higher tax brackets and trigger phase-outs of deductions and credits. This is particularly relevant if you’re considering a Roth conversion or other income-generating strategies before April 15th.

Third, California offers a senior exemption credit for property taxes, but you need to be aware of it and claim it proactively. If you’re 62 or older with a household income under about $51,000, you might qualify for property tax assistance programs. While this doesn’t directly affect your April 15th return, it’s worth investigating if you’re a California homeowner trying to reduce your overall tax burden.

California also has its own rules around retirement plan distributions. While most retirement account distributions are taxable at the state level, there are some nuances. For example, qualified disaster distributions may have different treatment at the state versus federal level. If you took any special distributions during 2025, make sure you understand both the federal and California tax implications.

One opportunity specific to California retirees: if you’re considering moving out of state in retirement, careful timing can create significant tax savings. California taxes you based on residency, and the state is aggressive about claiming you’re still a resident even after you move. If you’re planning to leave California, you’ll want to establish clear residency in your new state before executing major financial transactions like large IRA distributions or the sale of appreciated assets. This is more of a long-term planning issue than an April 15th strategy, but it’s worth mentioning.

Your Tax Day Action Plan: What to Do Right Now

Here’s your practical checklist for the days or weeks remaining before April 15th:

Week of April 1-7: Review your 2025 tax projection with your accountant or tax software. Identify whether you’re on track to owe more or less than expected. Look at your year-to-date estimated tax payments and withholding. If you’re short, calculate how much additional you need to pay by April 15th to avoid penalties.

Week of April 8-12: If you haven’t maxed out your IRA contributions, contact your IRA custodian and make the contribution designated for tax year 2025. If you’re eligible for an HSA and haven’t contributed the maximum, fund your HSA for 2025. If you’re planning to bunch charitable contributions, set up your donor-advised fund (if you don’t already have one) or make direct contributions to charities before the deadline.

April 13-15: Make your final Q4 estimated tax payment for both federal and California (if applicable). Do a last check on any capital loss harvesting opportunities in your taxable accounts. File your return or extension if you need more time to gather documents (though remember, an extension to file is not an extension to pay).

After April 15: Take time to review what worked and what didn’t in your 2025 tax planning. Did you overpay or underpay estimated taxes? Were there strategies you missed that you should implement for 2026? Consider scheduling a mid-year tax projection meeting for 2026 so you’re not scrambling next April.

The most important action is simply to take action. Many retirees I work with here in Pasadena assume that once January ends, tax planning is over until next year. That’s not true. April 15th gives you one last bite at the apple for meaningful tax reduction strategies.

Final Thoughts: Tax Planning Beyond April 15th

While these five moves can make a real difference in your 2025 tax bill, the bigger picture is that tax planning for retirees shouldn’t be a once-a-year scramble. The most successful retirees I’ve worked with approach taxes strategically throughout the year, thinking several years ahead rather than just focusing on the current tax season.

Consider this: if you’re in your 60s or early 70s and your income is relatively low (maybe you’ve retired but haven’t started Social Security or significant IRA withdrawals yet), you might be in the lowest tax bracket you’ll ever see again. This could be the perfect time for Roth conversions, even though it increases your current year’s taxes. You’re essentially prepaying taxes at today’s low rates to avoid paying at tomorrow’s potentially higher rates.

Or think about the SECURE Act and SECURE 2.0 changes to required minimum distributions. If you’re approaching 73 (the new RMD age), you might want to take distributions before you’re required to, spreading out the tax burden rather than facing larger forced distributions later.

These strategies require looking beyond the current tax year, but they can save tens or even hundreds of thousands of dollars over the course of retirement. That’s real money that can fund more travel, support grandchildren’s education, or create a larger legacy for the causes and people you care about.

If you’re feeling overwhelmed by the complexity of retirement tax planning, you’re not alone. The tax code seems to get more complicated every year, and the stakes are high when you’re living on a fixed income. Working with a fee-only fiduciary financial advisor who specializes in retirement planning can help you cut through the noise and make confident decisions about your tax strategy.

Here in Pasadena, I’ve seen too many retirees pay unnecessary taxes simply because they didn’t know what strategies were available or how to implement them properly. Whether you work with me or another qualified advisor, make sure you have someone who can look at your complete financial picture and help you optimize for taxes both now and in the years ahead.

The April 15th deadline is approaching quickly, but you still have time to take action. Choose one or two of these five strategies that make the most sense for your situation, and get them implemented before Tax Day. Your future self will thank you when you’re enjoying retirement with more money in your pocket and less going to taxes.