You get one or the other, never both. The standard deduction is a flat amount set by your filing status. Itemizing means listing specific expenses on Schedule A and deducting the total instead. You take whichever is larger, and for the large majority of filers that is the standard deduction.
That was not always true. When the standard deduction roughly doubled in 2018, the share of returns that itemize fell sharply, and it has stayed low. Knowing whether you are in the minority takes about five minutes.
What counts as an itemized deduction
- State and local taxes. Income tax or sales tax, whichever is larger, plus property tax. Subject to an annual cap, and anything over the cap is simply lost.
- Mortgage interest and points on acquisition debt within the balance limits, reported to you on Form 1098.
- Charitable contributions to qualifying organisations, cash or property, with documentation.
- Medical and dental expenses, but only the portion above 7.5 percent of your adjusted gross income.
- Casualty and theft losses in a federally declared disaster area.
- Investment interest expense and a short list of other items.
Notice what is not on the list: unreimbursed employee expenses, tax preparation fees for individuals, safe deposit boxes and investment advisory fees. Those miscellaneous deductions have been suspended, which surprises people who itemized a decade ago. The IRS keeps the current rules in Topic 501 and on the Schedule A page.
The two traps in the arithmetic
The medical floor. Only the amount above 7.5 percent of your income counts. On $80,000 of income, the first $6,000 of medical expenses is invisible. A normal year of copays produces nothing; a surgery, a long hospital stay or sustained long-term care costs can produce a very large deduction. This is a threshold, not a slope, and it is why medical deductions cluster in specific years.
Who still itemizes
The profile is consistent: homeowners with a mortgage large enough that interest is substantial, in a state with meaningful income or property tax, who also give to charity. Add a high-medical year and it is not close. Renters without large charitable giving almost never get there.
Run your own numbers in the standard versus itemized calculator. It applies the cap and the medical floor for you, and shows the tax saving at your actual bracket rather than a flat percentage.
Bunching: making itemizing happen on purpose
If your itemized total lands just short of the standard deduction two years running, you get the standard deduction twice and your charitable giving produces no tax benefit at all. Bunching fixes that. You compress two years of deductible spending into one calendar year, itemize in that year, and take the standard deduction in the other.
In practice that means making January's charitable gift in December instead, paying a property tax instalment early where your county allows it, and scheduling elective medical work into the year that already has high costs. A donor-advised fund is the usual vehicle for the charitable half: you take the deduction when you fund it, then distribute grants to charities over following years, so the charities' cash flow is unaffected.
Deductions you get either way
Several valuable deductions sit above the line and are not part of this decision at all. Deductible traditional IRA contributions, health savings account contributions, the deductible half of self-employment tax, self-employed health insurance premiums and student loan interest all reduce your income whether you itemize or not. So does the qualified business income deduction, which comes off after it.
That is worth remembering when someone tells you the standard deduction means deductions no longer matter. It means Schedule A deductions rarely matter. The above-the-line ones matter as much as they ever did, and they are the reason the income tax estimator has a separate box for them.
If you do itemize, keep the paper
Itemizing means the numbers must be supportable. Written acknowledgement from the charity for any single gift of $250 or more, Form 1098 for mortgage interest, the property tax bill showing the amount and the date paid, and itemised medical statements rather than a credit card total. Keep them for at least three years after filing, and longer if the return involves property basis. Our guide on how long to keep tax records covers the periods.
The married filing separately trap
If you are married and file separately, and one spouse itemizes, the other one must itemize too, even if their total is nearly nothing. Couples in that situation should model both scenarios before choosing a status, because the wrong combination can cost thousands.