Franklin Templeton spotlights key 1040 tip after you file taxes

Most Americans file their 1040 each April, breathe a sigh of relief, and then shove the paperwork into a drawer until next spring. That simple habit could be costing you thousands in missed retirement savings and overlooked tax breaks, according to a recent Franklin Templeton analysis.

Director of Wealth Planning Bill Cass argues your 1040 is not a completed chore but a strategic planning document you should revisit throughout the year. Located on a single line of that form is data that shapes every tax decision you will make for the rest of this calendar year.

Franklin Templeton's wealth planning team lays out a roadmap for turning that one number into real savings across retirement, giving, and withholding choices.

You do not need to be a tax professional to act on this, but you do need to know exactly where to look first. Here is how that overlooked number can reshape how you save, give, and plan for next year's tax bracket.

The one line on your 1040 that shapes every tax decision

Line 15 of the 1040 form shows your taxable income, which sets the marginal federal tax bracket you fall into for the year. That single number is the foundation for every planning move Franklin Templeton outlines, from Roth conversions to pretax retirement savings decisions, according to Cass.

"Focusing on tax planning can help individuals find ways to improve their tax situation throughout the year," Cass wrote in the Franklin Templeton piece. The 2025 federal marginal tax brackets range from 10% for the lowest earners up to 37% at the top, according to the IRS.

Knowing this bracket matters because lower-bracket households may want to add income strategically, while high earners often benefit from cutting their taxable income further. Take a married couple earning $110,000 in taxable income for 2025; that figure places them in the 22% federal bracket under current published thresholds.

That trade-off drives nearly every move in the Franklin Templeton piece, which makes finding your marginal bracket the right place to start this year.

Why lower-bracket households should think about Roth conversions

If your taxable income places you in a lower federal bracket, Franklin Templeton suggests using that window to add income on purpose this year. The most common tool is a Roth conversion, which moves funds from a traditional IRA to a Roth IRA and pays taxes upfront.

You pay tax now at a lower rate, and future withdrawals in retirement grow tax-free, which hedges against higher tax rates down the road. The strategy has become more valuable since the One Big Beautiful Bill Act made the lower tax brackets permanent, according to Franklin Templeton.

Pair a conversion with a down year in your income or a slower job transition for the most tax-efficient result possible on that move. TheStreet has previously covered how Fidelity's suite of Roth strategies can quietly save your family a fortune in taxes across several generations at once.

When a Roth conversion makes the most sense

• Your 1040 shows you sitting in the 10% or 12% marginal federal tax bracket for the current tax year on line 15 of the form.
• Your income is temporarily lower than normal because of a job change, a long sabbatical, or an early retirement gap before Social Security begins later.
• You expect federal tax rates to be noticeably higher during your retirement withdrawal years compared to the lower bracket you occupy today.

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Charitable giving strategies that still work under the standard deduction

Most taxpayers no longer itemize because the standard deduction doubled starting in 2018, removing the tax benefit many once received for annual charitable gifts. Franklin Templeton notes that most filers now take the standard deduction, which means traditional year-by-year giving often produces no federal tax deduction at all.

One strong workaround is the qualified charitable distribution (QCD), which allows savers aged 70½ or older to send IRA funds directly to charity each year. The transfer skips your taxable income, which matters because a lower adjusted gross income can reduce Medicare premiums and Social Security taxation, according to Franklin Templeton.

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Another approach Franklin Templeton highlights is to bunch several years of planned donations into a single tax year so that your total itemized deductions exceed the standard deduction. Donor-advised funds make this easier, because you claim the full deduction upfront and then distribute the money to charities gradually over several years afterward.

Starting in 2026, the One Big Beautiful Bill Act introduces a new 0.5% floor on charitable deductions tied to adjusted gross income, Cass warns. That floor cuts what itemizers can deduct until their giving clears a threshold, which makes accelerating donations into 2025 worth a conversation with your advisor.

Retirement contributions as a year-round lever, not a year-end scramble

Franklin Templeton urges readers to treat retirement contributions as a year-round planning tool rather than a last-minute move before December, which most savers prefer. Raising your 401(k) or 403(b) deferral today lowers your taxable income for the full year, and the earlier you start, the more the savings compound.

The 2025 employee 401(k) contribution limit is $23,500, with a $7,500 catch-up available to savers aged 50 or older, according to the IRS. That cut stacks on top of any employer match, which often adds a meaningful upfront return on your savings before markets even enter the picture.

The IRS Form W-4 lets you update withholding when you change your deferral amount so your paycheck reflects the new, reduced taxable income figure correctly.

Choosing between pretax and Roth deferrals

• Pretax contributions cut today's taxable income, but later produce ordinary income taxes during each of your eventual retirement plan withdrawal years later on.
• Roth deferrals cost more today but generate tax-free retirement income during your retirement years once the relevant holding period rules are met.
• Holding both types of accounts gives you the flexibility to manage your federal tax bracket year by year during retirement as income needs shift.

What SECURE 2.0 means for savers ages 60 through 63

A provision from the SECURE 2.0 Act that took effect in 2025 allows workers ages 60 through 63 to make a higher catch-up contribution than before. For those savers, the workplace plan catch-up is increased to the greater of $10,000 or 150% of the regular catch-up amount, according to the IRS.

Cass describes this window as a late-career opportunity for anyone feeling behind on retirement savings as they approach their planned retirement date. Because the benefit applies only for a four-year stretch, missing even one year leaves meaningful tax-deferred growth permanently off your balance sheet, he writes.

"Tax-free income in retirement can be a big advantage if tax rates rise in the future or for those who expect to be in a higher bracket later in life." said Dina Caggiula, Head of Participant Experience, Vanguard.

High earners should note that starting in 2026, workers who earned more than $150,000 last year must route their catch-ups into Roth accounts by law. That change shifts the tax math and may reshape how some pre-retirees plan their final savings years before true retirement arrives.

Cross-check your current plan documents to confirm whether your employer has adopted the higher catch-up amount, because not every plan has updated its rules yet.

Why your paycheck withholding deserves a mid-year check

Franklin Templeton concludes with a reminder that federal taxes operate on a pay-as-you-go system, in which paycheck withholding covers your annual tax liability throughout the year. If your refund was unexpectedly large or small this year, your 1040 is signaling that your withholding probably needs adjusting on IRS Form W-4 soon.

A large refund means the government held your money interest-free all year, while a shortfall can trigger underpayment penalties when you file the following spring. The Tax Withholding Estimator helps you set the right withholding amount in 15 minutes using last year's return and a recent pay stub, according to the IRS.

Making that adjustment in the first half of the year, rather than in December, spreads the impact and cuts the chance of an April surprise. Life events like marriage, a new child, a second income, or a bonus are reasons to revisit your W-4 as soon as possible.

How to put your 1040 to work before next April

Pull your most recent 1040, find line 15, and mark your marginal federal bracket somewhere visible when you make money decisions this year. From there, you can layer the strategies Franklin Templeton outlines based on whether your goal is to cut taxable income or to deliberately fill lower tax brackets.

Remember that these moves work together rather than in isolation, so changes to withholding, retirement savings, and charitable giving interact within your overall tax picture.

Before executing any major move, such as a Roth conversion or a qualified charitable distribution, consult a certified financial planner or a trusted tax professional. Taxes change often, which is why this annual review belongs on your calendar as a recurring event, not an April afterthought.

Your mid-year 1040 checklist

• Confirm your marginal federal tax bracket using line 15 of your most recently filed tax return to set the planning baseline for the year.
• Decide whether your tax strategy for this year centers on adding income through Roth conversions or reducing income through larger retirement plan contributions.
• Schedule a conversation with your financial advisor or tax professional before any Roth conversion, qualified charitable distribution, or donor-advised fund move this year.

Related: Franklin Templeton plots a bold hedge fund pivot

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This story was originally published April 17, 2026 at 10:03 AM.