# US State Tax Calculator MCP

> US State Tax Calculator instantly determines US state income tax rates and total tax liabilities. This MCP lets your AI client calculate how much tax you owe based on specific taxable incomes, whether you're in a zero-tax haven like Texas or need to know the exact rate for New York.

## Overview
- **Category:** finance
- **Price:** Free
- **Tags:** us-tax, income-tax, state-rates, calculator, finance-tools

## Description

Need to figure out what your actual state taxes are? Before this MCP, checking income tax rates meant jumping between confusing IRS pages and remembering which states charge nothing. This tool gives your agent access to accurate US tax data—it’s like having a specialized financial consultant connected directly to your AI client. You can use it to determine the specific rate for any state or calculate total tax owed against a given income amount. If you're working with complex finances, this MCP is essential. It lives on Vinkius, giving compatibility across all major platforms, so you connect once and get access to accurate financial data instantly.

## Tools

### calculate_state_liability
Computes your total required state income tax based on a specific taxable income figure.

### get_state_rate
Looks up and returns the precise decimal tax rate for any US state.

### list_no_tax_states
Provides a list of all states that do not charge state income taxes.

## Prompt Examples

**Prompt:** 
```
What is the income tax rate in California?
```

**Response:** 
```
The income tax rate for California is 0.08.
```

**Prompt:** 
```
If I earned $50,000 in Texas, how much state income tax do I owe?
```

**Response:** 
```
Since Texas is a zero-tax state, your state income tax liability is $0.00.
```

**Prompt:** 
```
How much tax will I owe in New York on $100,000 of taxable income?
```

**Response:** 
```
Based on the current rate for New York, your estimated state tax liability is $6,500.00.
```

## Capabilities

### Determine state tax rates
Retrieves the specific decimal tax rate for any given US state.

### Calculate total tax liability
Computes the final amount of state income tax you owe based on your taxable income.

### Identify no-tax states
Lists all US jurisdictions that currently charge zero percent state income tax.

## Use Cases

### A client is moving from a high-tax state to Florida.
The financial planner asks their agent: 'How much tax will a $120,000 income generate in both New York and Florida?' The MCP uses `calculate_state_liability` for both states, providing the immediate difference in taxes owed.

### A company needs to know its payroll burden across 5 states.
The HR manager prompts: 'What is the state tax rate for Oregon and Illinois?' The agent uses `get_state_rate` multiple times, compiling a clean list of rates so the team can adjust their withholding sheets immediately.

### Modeling retirement income across different states.
The planner asks: 'Which states are tax-free for retirees?' The MCP uses `list_no_tax_states`, providing a definitive list that allows the client to choose their optimal location.

### Checking feasibility of investment in a new region.
The analyst asks: 'If we earn $50,000 here, what is our tax burden?' The agent runs the calculation via `calculate_state_liability`, allowing the team to quickly vet business locations.

## Benefits

- Determine precise tax rates instantly. Instead of guessing or checking outdated websites, you can use the `get_state_rate` tool to pull the exact rate for California or New York in seconds.
- Know where your money goes. Quickly identify all zero-tax states using `list_no_tax_states`, helping you advise clients on tax-efficient locations.
- Calculate final owed amounts accurately. Don't guess on payroll—run a projection with the `calculate_state_liability` tool to get the definitive dollar figure for any income level.
- Compare states easily. Model scenarios side-by-side, comparing total liabilities across multiple tax jurisdictions in one prompt.
- Save time and avoid errors. Your agent handles the complex math of state tax law, so you stop spending hours cross-referencing IRS documents.

## How It Works

The bottom line is your AI client gets fast access to complex financial data without you having to do manual research.

1. Tell your AI client what you want to know: for example, 'What is the rate in Florida?' or 'Calculate taxes on $100k.'
2. Your agent uses this MCP to query the US tax database and pull the necessary state rates or calculate total liability.
3. You get a direct answer—the specific tax rate or the final dollar amount owed, ready to use.

## Frequently Asked Questions

**How do I use the US State Tax Calculator MCP to find a state tax rate?**
You simply instruct your agent to use `get_state_rate` and provide the name of the state you're interested in. It will return the specific decimal rate for that jurisdiction.

**Does this MCP cover federal income tax calculations?**
No, this MCP focuses exclusively on US *state* income taxes. If you need federal tax data, you'll need a different financial tool.

**What if I want to see all the no-tax states using this MCP?**
Use the `list_no_tax_states` tool. It immediately provides a comprehensive list of jurisdictions that currently have zero state income tax.

**Can I calculate total liability for multiple incomes?**
Yes, you can run several calculations by prompting your agent to use the `calculate_state_liability` tool with different taxable incomes in a single request.