Every January, millions of Americans file their taxes the same way they always have, plugging in the same number for the standard deduction that they used last year.
That habit could quietly cost you money this filing season, because the standard deduction got bigger for the 2025 tax year.
The IRS adjusts the standard deduction most years to keep pace with inflation, and the latest bump is worth knowing before you sit down with your paperwork or hand it to a preparer. **What the Numbers Look Like Now** For the 2025 tax year, the standard deduction rises to $15,000 for single filers, up $400 from the prior year.
Married couples filing jointly get $30,000, an increase of $800, and heads of household can claim $22,500, up $600.
Those figures matter more than most people realize.
Roughly nine in ten taxpayers take the standard deduction rather than itemizing, according to IRS data, which means this single number shapes the tax bill for the vast majority of households. **Why the Increase Is Easy to Miss** The standard deduction isn't something you choose on a form or opt into.
If you use tax software, the program updates automatically.
If you fill out paper forms or use an older worksheet, you might still be working from last year's figure without noticing.
Using the 2024 amount instead of the 2025 amount on a manual return can overstate your taxable income, which means you'd owe more than necessary or get a smaller refund than you're due. **The Itemizing Question Worth Asking** The higher standard deduction also shifts the math for people who used to itemize.
If your mortgage interest, charitable donations, and state taxes added up to just barely more than the old standard deduction, the new, larger figure may now beat your itemized total.
Taking the standard deduction means less paperwork, no need to track every receipt, and often the same or better result.
But it's worth running both scenarios if you're near the threshold, especially if you made a large charitable gift or paid significant mortgage interest this year. **Extra Bumps for Older Filers** Taxpayers 65 and older, or those who are blind, can add an additional standard deduction on top of the base amount.
For 2025, that extra amount is $2,000 for single filers and $1,600 per qualifying person for married couples filing jointly.
That means a single 70-year-old filer could claim $17,000 without itemizing a single thing.
Married couples where both spouses are 65 or older could reach $33,200.
These add-ons are frequently overlooked, particularly by retirees who file on their own. **What to Do Before You File** Check the IRS website or your tax software's current-year figures before you start.
If you're working with a preparer, ask them to confirm which year's standard deduction they applied.
And if your income or life circumstances changed last year, a quick five-minute review of whether itemizing now makes sense could be the easiest money you save all spring. **Our Take** The standard deduction isn't glamorous, but it's the single line that affects more American tax returns than any other.
A few hundred dollars in extra deduction won't change your life, yet ignoring the update means voluntarily paying more than you owe.
Final Thoughts
In a year when grocery bills and rent are still squeezing budgets, that's a mistake worth avoiding.