2027 federal income tax brackets and standard deduction from IRS Rev. Proc. 2026-35.
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Federal income tax for tax year 2027 (or 2026) on an income, using the IRS rate schedule: subtracts the standard or itemized deduction (with the age and blindness extra), applies the brackets, returns the bracket-by-bracket breakdown, marginal and average rate, optional long-term capital gains taxed at 0, 15 or 20 percent, and the tax on the same facts under the other year. Federal income tax only; no credits, self-employment tax, NIIT, AMT or state tax.
Gross income or AGI before the deduction. Give this or taxable_income.
Tax year, 2027 or 2026. Default 2027.
Used with income. Default standard.
Blind filers, for the standard deduction extra.
Taxable income after the deduction. Give this or income.
Total itemized deductions, required when deduction is itemized.
Other deductions that reduce taxable income, for example the qualified business income deduction, worked out by you.
Filers 65 or older by December 31, for the standard deduction extra.
Long-term capital gains and qualified dividends included in taxable income, taxed at the preferential rates.
Pick your client. Values in capitals, like YOUR_TOKEN, are yours to fill in.
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claude mcp add --transport http tax-brackets-standard-deduction-2027-mcp https://tax-brackets-standard-deduction-2027-mcp.lipmichal.workers.dev/mcp
Federal income tax for tax year 2027 (or 2026) on an income, using the IRS rate schedule: subtracts the standard or itemized deduction (with the age and blindness extra), applies the brackets, returns the bracket-by-bracket breakdown, marginal and average rate, optional long-term capital gains taxed at 0, 15 or 20 percent, and the tax on the same facts under the other year. Federal income tax only; no credits, self-employment tax, NIIT, AMT or state tax.
| Argument | Type | Description |
|---|---|---|
| income | number | Gross income or AGI before the deduction. Give this or taxable_income. |
| tax_year | number | Tax year, 2027 or 2026. Default 2027. |
| deduction | string | Used with income. Default standard. |
| blind_count | integer | Blind filers, for the standard deduction extra. |
| filing_status* | string | |
| taxable_income | number | Taxable income after the deduction. Give this or income. |
| itemized_deductions | number | Total itemized deductions, required when deduction is itemized. |
| additional_deductions | number | Other deductions that reduce taxable income, for example the qualified business income deduction, worked out by you. |
| age_65_or_older_count | integer | Filers 65 or older by December 31, for the standard deduction extra. |
| long_term_capital_gains | number | Long-term capital gains and qualified dividends included in taxable income, taxed at the preferential rates. |
{
"type": "object",
"$schema": "http://json-schema.org/draft-07/schema#",
"required": [
"filing_status"
],
"properties": {
"income": {
"type": "number",
"maximum": 10000000000,
"minimum": 0,
"description": "Gross income or AGI before the deduction. Give this or taxable_income."
},
"tax_year": {
"enum": [
2027,
2026
],
"type": "number",
"description": "Tax year, 2027 or 2026. Default 2027."
},
"deduction": {
"enum": [
"standard",
"itemized"
],
"type": "string",
"description": "Used with income. Default standard."
},
"blind_count": {
"type": "integer",
"maximum": 2,
"minimum": 0,
"description": "Blind filers, for the standard deduction extra."
},
"filing_status": {
"enum": [
"single",
"married_filing_jointly",
"married_filing_separately",
"head_of_household",
"qualifying_surviving_spouse"
],
"type": "string"
},
"taxable_income": {
"type": "number",
"maximum": 10000000000,
"minimum": 0,
"description": "Taxable income after the deduction. Give this or income."
},
"itemized_deductions": {
"type": "number",
"maximum": 10000000000,
"minimum": 0,
"description": "Total itemized deductions, required when deduction is itemized."
},
"additional_deductions": {
"type": "number",
"maximum": 10000000000,
"minimum": 0,
"description": "Other deductions that reduce taxable income, for example the qualified business income deduction, worked out by you."
},
"age_65_or_older_count": {
"type": "integer",
"maximum": 2,
"minimum": 0,
"description": "Filers 65 or older by December 31, for the standard deduction extra."
},
"long_term_capital_gains": {
"type": "number",
"maximum": 10000000000,
"minimum": 0,
"description": "Long-term capital gains and qualified dividends included in taxable income, taxed at the preferential rates."
}
},
"additionalProperties": false
}The standard deduction for tax year 2027 (or 2026) for a filing status from IRS Rev. Proc. 2026-35, with the additional amount for each filer who is 65 or older or blind, the dependent rule (greater of a floor or earned income plus a fixed amount), and the change from the other year.
| Argument | Type | Description |
|---|---|---|
| tax_year | number | Tax year, 2027 or 2026. Default 2027. |
| blind_count | integer | How many filers are blind (0 to 2, joint returns only 2). Default 0. |
| earned_income | number | Earned income of the dependent filer, used only when can_be_claimed_as_dependent is true. |
| filing_status* | string | |
| age_65_or_older_count | integer | How many filers are 65 or older by December 31 of the tax year (0 to 2, joint returns only 2). Default 0. |
| can_be_claimed_as_dependent | boolean | True if someone else can claim this filer as a dependent. Default false. |
{
"type": "object",
"$schema": "http://json-schema.org/draft-07/schema#",
"required": [
"filing_status"
],
"properties": {
"tax_year": {
"enum": [
2027,
2026
],
"type": "number",
"description": "Tax year, 2027 or 2026. Default 2027."
},
"blind_count": {
"type": "integer",
"maximum": 2,
"minimum": 0,
"description": "How many filers are blind (0 to 2, joint returns only 2). Default 0."
},
"earned_income": {
"type": "number",
"maximum": 10000000000,
"minimum": 0,
"description": "Earned income of the dependent filer, used only when can_be_claimed_as_dependent is true."
},
"filing_status": {
"enum": [
"single",
"married_filing_jointly",
"married_filing_separately",
"head_of_household",
"qualifying_surviving_spouse"
],
"type": "string"
},
"age_65_or_older_count": {
"type": "integer",
"maximum": 2,
"minimum": 0,
"description": "How many filers are 65 or older by December 31 of the tax year (0 to 2, joint returns only 2). Default 0."
},
"can_be_claimed_as_dependent": {
"type": "boolean",
"description": "True if someone else can claim this filer as a dependent. Default false."
}
},
"additionalProperties": false
}Other 2027 inflation-adjusted tax amounts beside 2026 from IRS Rev. Proc. 2026-35: long-term capital gains 0 and 15 percent thresholds, child tax credit, adoption credit, earned income credit table, alternative minimum tax exemptions, estate and gift tax exclusions, section 179, qualified business income thresholds, health FSA, kiddie tax and the foreign earned income exclusion.
| Argument | Type | Description |
|---|---|---|
| topic | string | One topic or all. Default all. |
| tax_year | number | Tax year, 2027 or 2026. Default 2027. |
{
"type": "object",
"$schema": "http://json-schema.org/draft-07/schema#",
"properties": {
"topic": {
"enum": [
"all",
"capital_gains",
"child_tax_credit",
"earned_income_credit",
"amt",
"estate_and_gift",
"business",
"other"
],
"type": "string",
"description": "One topic or all. Default all."
},
"tax_year": {
"enum": [
2027,
2026
],
"type": "number",
"description": "Tax year, 2027 or 2026. Default 2027."
}
},
"additionalProperties": false
}The federal income tax rate schedule for tax year 2027 (or 2026) from IRS Rev. Proc. 2026-35: the seven brackets (10, 12, 22, 24, 32, 35, 37 percent) for single, married filing jointly, married filing separately and head of household, or estates and trusts, with the tax at the bottom of each bracket and the change in each threshold from the other year. A model cannot know the 2027 numbers from training. Thresholds apply to taxable income after the deduction.
| Argument | Type | Description |
|---|---|---|
| compare | boolean | Include the other year for comparison. Default true. |
| tax_year | number | Tax year, 2027 or 2026. Default 2027. |
| filing_status | string | One filing status. Omit for the four individual statuses. |
{
"type": "object",
"$schema": "http://json-schema.org/draft-07/schema#",
"properties": {
"compare": {
"type": "boolean",
"description": "Include the other year for comparison. Default true."
},
"tax_year": {
"enum": [
2027,
2026
],
"type": "number",
"description": "Tax year, 2027 or 2026. Default 2027."
},
"filing_status": {
"enum": [
"single",
"married_filing_jointly",
"married_filing_separately",
"head_of_household",
"qualifying_surviving_spouse",
"estates_and_trusts"
],
"type": "string",
"description": "One filing status. Omit for the four individual statuses."
}
},
"additionalProperties": false
}We read every tool's name, description and inputs the way the model will, looking for instructions hidden from you. A clean result means no warning signs, not a guarantee. Scanned Nov 7, 2026.