State, Local, Sales, Use, Estate, Gift & Inheritance Tax

Start with the jurisdiction, the relevant year or transaction date, and the event being taxed. Income taxes depend on residency, income source, and the jurisdiction’s taxable-income rules. Sales and use taxes depend on the purchase and its location. Estate tax concerns an estate, inheritance tax can depend on the beneficiary’s relationship to the deceased, and federal gift tax concerns the donor’s lifetime transfers. A federal income-tax formula cannot resolve those separate questions.

Which tax calculation matches your question?

For a household comparing a move, purchase, investment sale, gift, or inheritance, the first decision is which tax system applies—not which rate to enter.

The distinctions are substantive. New York’s income-tax rules distinguish residents from nonresidents; California’s sales-tax guidance distinguishes transaction and delivery locations; Pennsylvania’s inheritance tax distinguishes beneficiary relationships. Use the relevant agency’s instructions rather than treating these as interchangeable percentage calculations.

How do state and local income taxes depend on where you live and work?

Establish residency and income source before applying a tax schedule. A mailing address alone does not answer either question.

New York, for example, generally taxes residents on income regardless of where it is earned. Nonresidents generally pay New York State income tax on New York-source income. Part-year residents must distinguish income received during residency from New York-source income received while nonresident. The state’s residency guidance and Form IT-203 instructions explain those distinctions.

Local tax requires a separate check. New York City personal income tax applies to city residents, not simply to everyone who works in the city. Yonkers has different resident and nonresident rules. Do not infer local liability from state liability or an employer’s location.

Build the taxable-income base before choosing a rate

For the selected tax year, obtain the jurisdiction’s resident, part-year, or nonresident return instructions. Identify:

1. The required filing status.
2. The starting income figure and state or local additions and subtractions.
3. Applicable deductions, exemptions, and allocation rules.
4. The required tax table, rate schedule, or computation worksheet.
5. Credits and payments, including withholding.

Gross income, federal adjusted gross income (AGI), and state taxable income are not interchangeable. New York’s nonresident method, for example, calculates a base tax as though the taxpayer were a full-year resident and then apportions that tax. Multiplying only New York wages by one bracket rate does not reproduce that method.

The Local Income Tax Calculator uses a simpler relationship:

[
B=\max(G-A,0)
]

[
T=B\times r,\qquad D=T-W
]

Here, (G) is entered gross income, (A) is entered local adjustments, (B) is the modeled taxable base, (r) is the entered rate expressed as a decimal, (T) is estimated tax, and (W) is withholding or payments. Dollar amounts must cover the same period. A positive (D) indicates a modeled balance due; a negative amount indicates payments exceed modeled tax. The tool does not identify the jurisdiction or apply residency allocation, reciprocity, credits, or caps.

Withholding is a payment toward tax, not the tax liability itself. Likewise, a marginal rate applies to an additional portion of income; it is not automatically the rate on all income. Do not substitute a top bracket rate for a complete jurisdiction-specific calculation.

Why can state capital-gains tax differ from federal tax?

A federal preferential rate does not establish the state rate. California, for example, taxes capital gains as ordinary income rather than providing a lower capital-gains rate. Differences between federal and California treatment may require California Schedule D (540), as explained in the Franchise Tax Board’s capital-gains guidance.

Residency and asset location also matter. California’s residency-change guidance distinguishes gains on California real property from gains on investment assets and explains how residency affects taxation. Moving does not, by itself, remove every gain from the former state’s tax base.

For a planning comparison, calculate:

[
\text{Incremental state tax}
=
\text{State tax with the sale}
–
\text{State tax without the sale}
]

Keep filing status and other assumptions consistent, but recompute affected deductions and credits. This comparison is more informative than multiplying the gain by a single rate when the sale changes the applicable brackets or other return calculations. Use the state-adjusted taxable gain—not gross sale proceeds—as the starting transaction amount.

How do sales tax, reverse sales tax, and use tax differ?

Sales-tax arithmetic begins only after determining whether the purchase is taxable and which location’s rules apply. California’s Publication 105 explains that rates vary by location and provides an address-based lookup. Its district-tax guidance also distinguishes over-the-counter transactions from deliveries across district boundaries. Those California rules should not be treated as a nationwide sourcing rule.

For a fully taxable purchase subject to one combined rate:

[
S=P\times r,\qquad C=P+S
]

Here, (P) is the pretax taxable price in dollars, (r) is the applicable combined rate as a decimal, (S) is sales tax, and (C) is the total.

If the known amount already includes tax:

[
P=\frac{C}{1+r},\qquad S=C-P
]

Do not calculate included tax by multiplying the total by the rate. These formulas also assume no separately taxed fees, exempt items, or components subject to different rates.

Use tax addresses taxable use when the seller has not collected the applicable tax. California’s guidance, for example, explains circumstances in which the customer remains liable for district use tax even though the retailer did not collect it.

A simplified use-tax relationship is:

[
U=\max(B\times r-K,0)
]

Here, (B) is the taxable use-tax base in dollars, (r) is the applicable rate, and (K) is an allowable credit for qualifying tax already paid. The credit must be supported by the jurisdiction’s rules. California’s published guidance distinguishes tax properly incurred in another state from tax mistakenly paid there; the latter does not automatically qualify for credit.

Hypothetical purchase: calculate tax forward, backward, and after a credit

Assume a household purchases one fully taxable item for $1,250.00. For this arithmetic example only, assume the relevant jurisdiction and transaction date have a combined rate of 8%. This is an illustrative input, not a published rate for any state or tax year.

Also assume there are no delivery charges, exemptions, or mixed-rate items.

1. Sales tax: $1,250.00 × 0.08 = $100.00.
2. Total purchase cost: $1,250.00 + $100.00 = $1,350.00.
3. Reverse calculation: $1,350.00 ÷ 1.08 = $1,250.00 pretax.
4. Included tax: $1,350.00 − $1,250.00 = $100.00.

For a separate use-tax scenario involving the same taxable base and assumed rate, suppose the jurisdiction allows a documented $62.50 credit for qualifying tax already paid:

[
U=\max($1,250.00\times0.08-$62.50,0)=$37.50
]

The $37.50 result represents additional use tax under those assumptions—not another full sales-tax charge on top of the $100.00 in the first scenario.

The example calculations retain cents and round monetary results to the nearest cent. Actual invoice and return rounding must follow the relevant jurisdiction’s instructions; a cent-based planning calculation does not establish a return’s rounding method.

How are estate tax and inheritance tax different?

Federal estate tax applies to the taxable estate as a whole, not separately to each beneficiary’s share. State inheritance tax can instead depend on who receives the property and that person’s relationship to the deceased. The Form 706 instructions and Pennsylvania inheritance-tax guidance illustrate the distinction.

Estate tax requires separate federal and state calculations

Use the date of death to select the applicable estate-tax rules. For federal estate tax, gather the gross estate, allowable deductions, adjusted taxable gifts, prior gift-tax information, and applicable exclusion and credit information. Citizenship and domicile also matter: federal estate-tax residency is based on domicile, which should not be inferred solely from income-tax residency.

A filing threshold is not necessarily the same as an amount on which tax becomes payable. Form 706 filing requirements consider the gross estate and specified prior transfers, while the tax calculation also considers deductions and credits. A return may also be needed to elect portability of a deceased spouse’s unused exclusion even when the estate would otherwise fall below the mandatory filing threshold.

Do not reuse an older exclusion merely because an earlier article predicted it would apply. Public Law 119-21, commonly called the One Big Beautiful Bill Act, changed the federal basic exclusion beginning with calendar year 2026. Select the amount for the actual gift year or year of death from current IRS guidance.

State estate tax remains a separate calculation. New York publishes its own date-of-death exclusion amounts and directs taxpayers to the tax table on Form ET-706. A federal no-tax result therefore does not establish a state no-tax result.

The Estate Tax Calculator subtracts entered deductions and an exemption from a modeled transfer-tax base, applies a user-supplied rate, and subtracts entered credits. This is a simplified scenario model, not the federal unified-rate and credit computation required by Form 706. Its output does not determine filing obligations or make a portability election.

Inheritance tax requires the beneficiary’s legal classification

Pennsylvania’s inheritance-tax rules distinguish surviving spouses, lineal heirs, siblings, and other beneficiaries. Certain transfers are exempt. The beneficiary’s relationship is therefore a required legal input, not merely a descriptive label.

Before estimating inheritance tax, establish whether the state taxes the transfer, how the property is classified, which beneficiary category applies, and which exemptions or deductions are available for the date of death.

The Inheritance Tax Calculator subtracts an entered beneficiary exemption and multiplies the remainder by an entered rate. It does not determine whether inheritance tax applies, classify the beneficiary, or account for estate-tax interactions. Enter only an exemption and rate supported by the applicable state’s instructions.

Does a gift above the annual exclusion automatically create tax?

No. A federal gift-tax reporting requirement and a current tax payment are different outcomes. Gifts exceeding the applicable annual exclusion may require Form 709 even when available credit eliminates current gift tax. The donor generally bears responsibility for the tax.

For an ordinary outright gift qualifying as a present interest, the initial calculation is:

[
Q=\max(G-E,0)
]

Here, (G) is the donor’s total qualifying gifts to the same recipient during the calendar year, (E) is that year’s annual exclusion, and (Q) is the amount remaining before other applicable deductions and the cumulative gift-tax computation. The exclusion is not a fresh allowance for every transfer to that recipient.

Before using that relationship, check the Form 709 instructions for:

• Present-interest versus future-interest gifts.
• Gifts to a spouse, including a spouse who is not a U.S. citizen.
• Gift-splitting consent and filing requirements.
• Qualifying tuition or medical payments made directly to the institution or provider.
• Prior taxable gifts and any deceased-spouse unused exclusion.

Future-interest gifts do not qualify for the ordinary annual exclusion. Qualifying direct tuition and medical payments use separate exclusions; giving the recipient cash to make the payment does not establish that direct-payment exclusion.

The Gift Tax Calculator provides simplified arithmetic, but its published formula adds prior taxable gifts before subtracting an input labeled “lifetime exemption remaining.” If that remaining amount already reflects prior gifts, the formula can count their effect twice. Do not interpret its “Gift Tax” output as a Form 709 tax determination. The official calculation uses cumulative taxable gifts, the prescribed tax table, and applicable credits—not merely one rate multiplied by an excess amount.

Which records should accompany a tax estimate?

Keep the governing inputs with each saved scenario so another person can understand what the result means.

US Tax Calculators estimates scenarios from entered facts. It does not prepare or submit returns, make elections, or determine eligibility from records it cannot see. Check each result against the applicable IRS or state instructions before using it to prepare a filing, transaction, or discussion with a qualified tax professional.