US Tax Estimator

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Federal tax estimate, deadlines, FBAR/8938/3520 checks, §7702 screen, inherited-stock step-up.

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check_foreign_reporting_requirements Read-only

Checks a U.S. person's foreign-asset figures against the filing thresholds for FBAR (FinCEN Form 114), Form 8938 (FATCA) and Form 3520 (gifts or bequests from a foreign individual or estate). Only the forms whose figures are given are checked. Thresholds only: it does not decide which accounts or assets count; the descriptions of each input say what to include.

filing_statusstring, required

Federal filing status.

lives_abroadboolean

Form 8938: true if the taxpayer meets the bona fide residence or physical presence test abroad (higher thresholds).

foreign_gifts_receivednumber

Form 3520: total gifts and bequests received in the year from nonresident alien individuals or foreign estates, USD.

specified_foreign_assets_maxnumber

Form 8938: the highest value of specified foreign financial assets at any time in the year, USD.

foreign_accounts_max_aggregatenumber

FBAR: the highest combined value of all foreign financial accounts at any time in the year, USD.

specified_foreign_assets_year_endnumber

Form 8938: value of specified foreign financial assets on the last day of the year, USD.

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Call this server's tools from your browser. Nothing to install.

https://my.yz-cpa.com/mcp

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check_foreign_reporting_requirements Read-only

filing_statusstring, required

Federal filing status.

lives_abroadboolean

Form 8938: true if the taxpayer meets the bona fide residence or physical presence test abroad (higher thresholds).

foreign_gifts_receivednumber

Form 3520: total gifts and bequests received in the year from nonresident alien individuals or foreign estates, USD.

specified_foreign_assets_maxnumber

Form 8938: the highest value of specified foreign financial assets at any time in the year, USD.

foreign_accounts_max_aggregatenumber

FBAR: the highest combined value of all foreign financial accounts at any time in the year, USD.

specified_foreign_assets_year_endnumber

Form 8938: value of specified foreign financial assets on the last day of the year, USD.

Tools (6)

check_foreign_reporting_requirements

read-only

Argument	Type	Description
lives_abroad	boolean	Form 8938: true if the taxpayer meets the bona fide residence or physical presence test abroad (higher thresholds).
filing_status*	string	Federal filing status.
foreign_gifts_received	number	Form 3520: total gifts and bequests received in the year from nonresident alien individuals or foreign estates, USD.
specified_foreign_assets_max	number	Form 8938: the highest value of specified foreign financial assets at any time in the year, USD.
foreign_accounts_max_aggregate	number	FBAR: the highest combined value of all foreign financial accounts at any time in the year, USD.
specified_foreign_assets_year_end	number	Form 8938: value of specified foreign financial assets on the last day of the year, USD.

Input schema (JSON)

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "filing_status"
  ],
  "properties": {
    "lives_abroad": {
      "type": "boolean",
      "default": false,
      "description": "Form 8938: true if the taxpayer meets the bona fide residence or physical presence test abroad (higher thresholds)."
    },
    "filing_status": {
      "enum": [
        "single",
        "married_filing_jointly",
        "married_filing_separately",
        "head_of_household"
      ],
      "type": "string",
      "description": "Federal filing status."
    },
    "foreign_gifts_received": {
      "type": "number",
      "maximum": 10000000000,
      "minimum": 0,
      "description": "Form 3520: total gifts and bequests received in the year from nonresident alien individuals or foreign estates, USD."
    },
    "specified_foreign_assets_max": {
      "type": "number",
      "maximum": 10000000000,
      "minimum": 0,
      "description": "Form 8938: the highest value of specified foreign financial assets at any time in the year, USD."
    },
    "foreign_accounts_max_aggregate": {
      "type": "number",
      "maximum": 10000000000,
      "minimum": 0,
      "description": "FBAR: the highest combined value of all foreign financial accounts at any time in the year, USD."
    },
    "specified_foreign_assets_year_end": {
      "type": "number",
      "maximum": 10000000000,
      "minimum": 0,
      "description": "Form 8938: value of specified foreign financial assets on the last day of the year, USD."
    }
  }
}

compare_offshore_compliance_options

For a U.S. taxpayer who missed FBAR or Form 8938 filings or left foreign income unreported, estimates and compares the cost of three catch-up paths: A) delinquent information return procedures (only when no income went unreported), B) amended returns with tax and interest plus a reasonable-cause statement (with the statutory penalty exposure if reasonable cause is rejected), and C) the Streamlined Domestic Offshore Procedures (tax, interest and the 5% penalty). Also adds the 1% Form 720 excise tax on premiums paid to foreign insurers. Tax years 2019–2025. Assumes non-willful conduct; it does not decide eligibility.

read-only

Argument	Type	Description
years*	array	One entry per affected tax year.
filing_status*	string	Filing status used on the original returns.

Input schema (JSON)

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "filing_status",
    "years"
  ],
  "properties": {
    "years": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "agi",
          "taxable_income",
          "year"
        ],
        "properties": {
          "agi": {
            "type": "number",
            "maximum": 10000000000,
            "minimum": 0,
            "description": "Adjusted gross income as originally filed, USD (for the 3.8% net investment income tax)."
          },
          "year": {
            "type": "integer",
            "maximum": 2100,
            "minimum": 2000,
            "description": "Tax year (2019–2025)."
          },
          "taxable_income": {
            "type": "number",
            "maximum": 10000000000,
            "minimum": 0,
            "description": "Taxable income as originally filed, USD."
          },
          "unreported_income": {
            "type": "number",
            "default": 0,
            "maximum": 10000000000,
            "minimum": 0,
            "description": "Income that should have been reported but was not, USD (e.g. foreign interest, dividends, §7702(g) policy growth)."
          },
          "fbar_filed_complete": {
            "type": "boolean",
            "default": false,
            "description": "FBAR for that year was filed on time and listed every account and policy."
          },
          "form_8938_filed_complete": {
            "type": "boolean",
            "default": false,
            "description": "Form 8938 for that year was filed and complete."
          },
          "foreign_insurance_premiums": {
            "type": "number",
            "default": 0,
            "maximum": 10000000000,
            "minimum": 0,
            "description": "Premiums paid that year to foreign life insurers or annuity issuers, USD (1% excise tax)."
          },
          "year_end_unreported_foreign_assets": {
            "type": "number",
            "default": 0,
            "maximum": 10000000000,
            "minimum": 0,
            "description": "Year-end value of foreign assets that were not properly reported, USD (the base for the Streamlined 5% penalty)."
          }
        }
      },
      "maxItems": 8,
      "minItems": 1,
      "description": "One entry per affected tax year."
    },
    "filing_status": {
      "enum": [
        "single",
        "married_filing_jointly"
      ],
      "type": "string",
      "description": "Filing status used on the original returns."
    }
  }
}

estimate_federal_tax

Estimates a year's U.S. federal income tax plus self-employment tax, the refund or balance due after withholding and estimated payments, marginal and effective rates, a bracket-by-bracket breakdown and, when prior-year figures are given, the safe-harbor quarterly estimated payment. Also answers 'how much more can I earn, withdraw from a 401(k) or convert to a Roth IRA before the next bracket': the room left in the current bracket, the room before qualified dividends / long-term gains lose the 0% rate, and the tax on a planned extra amount. Uses the standard deduction (with the age-65+ addition) unless larger itemized deductions are given; the 2025–2028 $6,000 senior deduction with phase-out; qualified dividends and long-term gains at 0%/15%/20%; child tax credit with phase-out; Social Security wage base and Additional Medicare tax. Federal only: no state tax, AMT, NIIT, QBI deduction, IRMAA or other credits.

read-only

Argument	Type	Description
tax_year*	integer	Tax year: 2025 or 2026.
w2_wages	number	W-2 wages (Social Security / Medicare wages), USD; reduces the self-employment Social Security tax room. 0 if none.
total_income*	number	Total income for the year before deductions, USD: wages, interest, dividends, other income and self-employment profit together.
filing_status*	string	Federal filing status.
prior_year_agi

estimate_inheritance_step_up

For U.S.-listed stocks, ETFs, mutual funds or crypto held at someone's death (directly, in an estate or in a revocable living trust), estimates the value on the date of death from public market prices, the IRC §1014 step-up in cost basis and the capital-gains tax the heirs avoid (15%–23.8%), plus the dates that matter: the §2032 alternate valuation date, the Form 706 due date and the last day for a portability election (Rev. Proc. 2022-32). Valuation follows Treas. Reg. §20.2031-2(b) (mean of high and low, weekend and no-trade days weighted) and §20.2031-8(b) for funds. Up to 25 holdings. An estimate for planning, not a signed valuation a broker or the IRS will accept; the reply says where to get one.

read-only

Argument	Type	Description
holdings*	array	Holdings at the date of death.
date_of_death*	string	Date of death, YYYY-MM-DD (must be before today).

Input schema (JSON)

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "date_of_death",
    "holdings"
  ],
  "properties": {
    "holdings": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "shares",
          "symbol"
        ],
        "properties": {
          "shares": {
            "type": "number",
            "maximum": 10000000000,
            "description": "Shares or units held at death.",
            "exclusiveMinimum": 0
          },
          "symbol": {
            "type": "string",
            "maxLength": 15,
            "minLength": 1,
            "description": "Ticker as listed in the U.S., e.g. AAPL, BRK.B, VFIAX, BTC."
          },
          "asset_type": {
            "enum": [
              "stock",
              "etf",
              "fund",
              "crypto"
            ],
            "type": "string",
            "description": "Optional; detected from the symbol. Give crypto for BTC, ETH and other coins."
          },
          "original_cost": {
            "type": "number",
            "maximum": 10000000000,
            "minimum": 0,
            "description": "Total original cost basis of this holding, USD. Optional; needed to compute the step-up."
          }
        }
      },
      "maxItems": 25,
      "minItems": 1,
      "description": "Holdings at the date of death."
    },
    "date_of_death": {
      "type": "string",
      "pattern": "^\\d{4}-\\d{2}-\\d{2}$",
      "description": "Date of death, YYYY-MM-DD (must be before today)."
    }
  }
}

list_federal_tax_deadlines

Lists upcoming U.S. federal tax deadlines with days remaining: quarterly estimated payments (1040-ES), individual return and extension dates, and optionally S-corporation, partnership and C-corporation return and estimated-tax dates. Dates are already moved off weekends and holidays.

read-only

Argument	Type	Description
limit	integer	Maximum number of deadlines to return.
from_date	string	List deadlines on or after this date (YYYY-MM-DD). Default: today (U.S. Central).
include_business	boolean	Also list business return and C-corporation estimated tax dates.

Input schema (JSON)

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "properties": {
    "limit": {
      "type": "integer",
      "default": 8,
      "maximum": 30,
      "minimum": 1,
      "description": "Maximum number of deadlines to return."
    },
    "from_date": {
      "type": "string",
      "pattern": "^\\d{4}-\\d{2}-\\d{2}$",
      "description": "List deadlines on or after this date (YYYY-MM-DD). Default: today (U.S. Central)."
    },
    "include_business": {
      "type": "boolean",
      "default": false,
      "description": "Also list business return and C-corporation estimated tax dates."
    }
  }
}

screen_foreign_life_insurance_7702

Preliminary screen of whether a non-U.S. savings-type life insurance policy (for example a Hong Kong whole-life or savings plan) meets the U.S. definition of life insurance under IRC §7702, using the cash value accumulation test (CVAT) and the cash value corridor, from the policy's cash value table. A policy that fails is taxed each year on its inside growth (§7702(g)). Values in any one currency (ratios do not depend on currency). Does not check the guideline premium limit.

read-only

Argument	Type	Description
sex*	string	Insured's sex (mortality table).
issue_age*	integer	Insured's age at issue, completed years.
issue_year*	integer	Calendar year the policy was issued.
policy_years*	array	Rows from the policy's illustration / cash value table; a few years such as 1, 5, 10, 20 are enough.
increasing_benefit_rule	object	For policies whose death benefit grows by a fixed rate: lets years without a death_benefit be computed.

Input schema (JSON)

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "issue_age",
    "issue_year",
    "policy_years",
    "sex"
  ],
  "properties": {
    "sex": {
      "enum": [
        "M",
        "F"
      ],
      "type": "string",
      "description": "Insured's sex (mortality table)."
    },
    "issue_age": {
      "type": "integer",
      "maximum": 90,
      "minimum": 0,
      "description": "Insured's age at issue, completed years."
    },
    "issue_year": {
      "type": "integer",
      "maximum": 2100,
      "minimum": 1985,
      "description": "Calendar year the policy was issued."
    },
    "policy_years": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "cash_value",
          "policy_year"
        ],
        "properties": {
          "cash_value": {
            "type": "number",
            "description": "Cash (surrender) value at the end of that policy year.",
            "exclusiveMinimum": 0
          },
          "policy_year": {
            "type": "integer",
            "maximum": 100,
            "minimum": 1
          },
          "death_benefit": {
            "type": "number",
            "description": "Death benefit at the end of that policy year (omit only when increasing_benefit_rule is given).",
            "exclusiveMinimum": 0
          }
        }
      },
      "maxItems": 80,
      "minItems": 1,
      "description": "Rows from the policy's illustration / cash value table; a few years such as 1, 5, 10, 20 are enough."
    },
    "increasing_benefit_rule": {
      "type": "object",
      "required": [
        "annual_premium",
        "basic_sum_insured",
        "growth_rate",
        "pay_years"
      ],
      "properties": {
        "pay_years": {
          "type": "integer",
          "maximum": 40,
          "minimum": 1,
          "description": "Number of premium-paying years."
        },
        "growth_rate": {
          "type": "number",
          "maximum": 0.1,
          "minimum": 0,
          "description": "Yearly growth of the sum insured as a decimal (0.035 = 3.5%)."
        },
        "annual_premium": {
          "type": "number",
          "description": "Annual premium.",
          "exclusiveMinimum": 0
        },
        "basic_sum_insured": {
          "type": "number",
          "description": "Basic sum insured at issue.",
          "exclusiveMinimum": 0
        }
      },
      "description": "For policies whose death benefit grows by a fixed rate: lets years without a death_benefit be computed."
    }
  }
}

{ "type": "object", "$schema": "http://json-schema.org/draft-07/schema#", "required": [ "filing_status", "tax_year", "total_income" ], "properties": { "tax_year": { "type": "integer", "maximum": 2100, "minimum": 2000, "description": "Tax year: 2025 or 2026." }, "w2_wages": { "type": "number", "default": 0, "maximum": 10000000000, "minimum": 0, "description": "W-2 wages (Social Security / Medicare wages), USD; reduces the self-employment Social Security tax room. 0 if none." }, "total_income": { "type": "number", "maximum": 10000000000, "minimum": 0, "description": "Total income for the year before deductions, USD: wages, interest, dividends, other income and self-employment profit together." }, "filing_status": { "enum": [ "single", "married_filing_jointly", "married_filing_separately", "head_of_household" ], "type": "string", "description": "Federal filing status." }, "prior_year_agi": { "type": "number", "maximum": 10000000000, "minimum": 0, "description": "Last year's adjusted gross income, USD (decides 100% vs 110% safe harbor)." }, "federal_withholding": { "type": "number", "default": 0, "maximum": 10000000000, "minimum": 0, "description": "Federal income tax withheld for the year (W-2 box 2, 1099 withholding), USD." }, "itemized_deductions": { "type": "number", "maximum": 10000000000, "minimum": 0, "description": "Total itemized deductions (Schedule A), USD. Used only when larger than the standard deduction." }, "qualifying_children": { "type": "integer", "default": 0, "maximum": 20, "minimum": 0, "description": "Children under 17 who qualify for the child tax credit." }, "planned_extra_income": { "type": "number", "maximum": 10000000000, "minimum": 0, "description": "What-if: extra ordinary income being considered for the year (401(k) or IRA withdrawal, Roth conversion, bonus), USD, NOT included in total_income. Returns the tax it adds and the marginal rate after." }, "prior_year_total_tax": { "type": "number", "maximum": 10000000000, "minimum": 0, "description": "Last year's total federal tax, USD. Give it to get the quarterly safe-harbor payment." }, "self_employment_profit": { "type": "number", "default": 0, "maximum": 10000000000, "minimum": 0, "description": "Net self-employment profit (Schedule C), USD. Already included in total_income; used for self-employment tax." }, "estimated_payments_made": { "type": "number", "default": 0, "maximum": 10000000000, "minimum": 0, "description": "Federal estimated tax payments already made for this year, USD." }, "taxpayers_age_65_or_older": { "type": "integer", "default": 0, "maximum": 2, "minimum": 0, "description": "Taxpayers on the return who are 65 or older by year end (0, 1 or 2): adds the age-65+ standard deduction and the $6,000 senior deduction (2025–2028)." }, "qualified_dividends_and_long_term_gains": { "type": "number", "default": 0, "maximum": 10000000000, "minimum": 0, "description": "Qualified dividends (1099-DIV box 1b) plus net long-term capital gains, USD. Part of total_income; taxed at 0%/15%/20% stacked on top of ordinary income." } } }