The formulas
- 2026 base: $16,100 single or married separate, $32,200 joint or qualifying surviving spouse, $24,150 head of household
- Add $1,650 per box, or $2,050 per box if unmarried and not a surviving spouse
- Compare with total itemized deductions
How it works
You subtract either the standard deduction or your itemized deductions, whichever you choose. The 2026 standard deduction amounts are in Rev. Proc. 2025-32: $16,100 for single and married filing separately, $24,150 for head of household and $32,200 for joint filers and surviving spouses.
Each person who is 65 or older or blind adds $1,650, or $2,050 if unmarried and not a surviving spouse. Count one box for each condition for each person. A person who can be claimed as a dependent has a different, lower limit that this tool does not apply.
Illustrative figures only. Check the result against your firm's methodology before relying on it.
Common questions
What is the limit for a dependent?
For 2026 it is the greater of $1,350 or $450 plus earned income, up to the regular amount.
What goes in itemized deductions?
Your Schedule A total, such as taxes within the limit, mortgage interest, charitable gifts and medical expenses above the floor.
Does this include the senior deduction?
No. The senior deduction under section 151(d)(5) is separate. See the senior deduction tool.
Sources
Runs in your browser. The figures you type are not sent to CORAA or stored. Check the result against your firm's methodology before relying on it.