One question, one answer
22 pages, one question each. The figure itself, who or what it applies to, the primary document it was read out of and the date it was read — then a link to the calculator that uses it.
United States · federal · tax year 2026 · every figure from an open dataset with its source
Income tax: the brackets and the standard deduction
The 2026 standard deduction
What is the standard deduction for 2026?
2026 tax brackets — single
What are the 2026 federal income tax brackets for a single filer?
2026 tax brackets — married filing jointly
What are the 2026 federal income tax brackets for married filing jointly?
2026 tax brackets — married filing separately
What are the 2026 federal income tax brackets for married filing separately?
2026 tax brackets — head of household
What are the 2026 federal income tax brackets for head of household?
Self-employment tax
The 2026 Social Security wage base
What is the Social Security wage base for 2026?
The 2026 self-employment tax rate
What is the self-employment tax rate for 2026?
The 2026 Additional Medicare Tax
When does the Additional Medicare Tax start in 2026?
The qualified business income deduction
2026 QBI deduction income limits
What are the 2026 income limits for the qualified business income deduction?
The 2026 minimum QBI deduction
Is there a minimum qualified business income deduction in 2026?
Deductions and reporting thresholds
The 2026 IRS standard mileage rate
What is the IRS standard mileage rate for 2026?
The 2026 Form 1099-K threshold
What is the 1099-K reporting threshold for 2026?
The 2026 simplified home office deduction
How much is the simplified home office deduction in 2026?
Estimated tax
2026 estimated tax due dates
When are the 2026 quarterly estimated tax payments due?
The 2026 estimated tax safe harbour
How much do I have to pay in 2026 to avoid an underpayment penalty?
The 2026 annualized income installment method
How does the annualized income installment method work for 2026?
The federal poverty level
138% of the poverty level, 2026
What is 138% of the federal poverty level for 2026?
150% of the poverty level, 2026
What is 150% of the federal poverty level for 2026?
200% of the poverty level, 2026
What is 200% of the federal poverty level for 2026?
250% of the poverty level, 2026
What is 250% of the federal poverty level for 2026?
400% of the poverty level, 2026
What is 400% of the federal poverty level for 2026?
Alaska and Hawaii poverty levels, 2026
Why are the poverty guidelines different in Alaska and Hawaii?
How these pages are built
- One page answers one question. Where two questions have the same answer there is one page and not two: the joint schedule says outright that a qualifying surviving spouse uses it, instead of a second page repeating the same seven rows.
- Every figure is read from one of our two open datasets, and each dataset carries the primary document and the retrieval date for every row. Anything worked out from those figures is labelled as arithmetic rather than passed off as law.
- The answer sits in the HTML, before any script runs. A reader with JavaScript switched off and a machine that never runs it see the same sentence and the same numbers.
The whole dataset
Every figure on this page, and everything around it, as a table you can read and as CSV and JSON you can download. Public domain, no attribution required.
