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Gig Worker Tax Toolkit

Official registry Finance and payments

2026 quarterly tax estimates, SE tax, safe harbor and mileage for 1099 gig workers.

Source code Documentation

What can you do with Gig Worker Tax Toolkit?

  • estimate_quarterly_tax: self-employment tax (92.35% of net, Social Security to the $184,500 base, Medicare, additional Medicare), federal income tax with 2026 brackets and standard deduction, the 20% QBI deduction when eligible, what is still owed, and an...
  • calculate_mileage_deduction: priced per trip by date. The IRS changed the 2026 business rate mid-year: 72.5 cents through June 30, then 76 cents from July 1. Most calculators apply one rate to the whole year.
  • check_safe_harbor: the minimum you must pay to avoid an underpayment penalty (90% of this year or 100%/110% of last year).
  • compare_mileage_vs_actual: standard mileage against actual vehicle expenses, with the rules that lock the choice in.
  • get_tax_constants: every figure used and its source.

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

Remote (streamable-http)
Claude Code 
claude mcp add --transport http gig-worker-tax-toolkit 'https://gig-tax-mcp.mcpize.run/mcp'
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "gig-worker-tax-toolkit": {
            "type": "http",
            "url": "https://gig-tax-mcp.mcpize.run/mcp"
        }
    }
}

Documentation

From the project's README on GitHub, refreshed weekly. Links open on GitHub.

Contents
  1. Gig Worker Tax Toolkit
  2. Know what to set aside, and when to pay it
  3. Tools
  4. Limits
  5. Use it

Gig Worker Tax Toolkit

Tax toolkit for 1099 gig workers and freelancers: 2026 quarterly estimates, self-employment tax, safe harbor check, and the mileage deduction with the July 2026 rate change (72.5 to 76 cents) handled correctly.

Know what to set aside, and when to pay it

For DoorDash, Uber, Lyft, Instacart, freelance and any 1099 income. Deterministic federal math using the official 2026 figures.

Tools

  • estimate_quarterly_tax: self-employment tax (92.35% of net, Social Security to the $184,500 base, Medicare, additional Medicare), federal income tax with 2026 brackets and standard deduction, the 20% QBI deduction when eligible, what is still owed, and an even split across the remaining real due dates (Apr 15, Jun 15, Sep 15, Jan 15).
  • calculate_mileage_deduction: priced per trip by date. The IRS changed the 2026 business rate mid-year: 72.5 cents through June 30, then 76 cents from July 1. Most calculators apply one rate to the whole year.
  • check_safe_harbor: the minimum you must pay to avoid an underpayment penalty (90% of this year or 100%/110% of last year).
  • compare_mileage_vs_actual: standard mileage against actual vehicle expenses, with the rules that lock the choice in.
  • get_tax_constants: every figure used and its source.

Limits

Federal only (optional flat state rate). Single and married filing jointly. Excludes credits, itemized deductions and retirement contributions, and does not apply the QBI deduction above the phase-out. An estimate for planning, not tax advice.

Use it

Hosted on MCPize with a free tier (10 calls a day). Remote MCP endpoint (streamable HTTP, API key from MCPize):

https://gig-tax-mcp.mcpize.run/mcp

Or run it yourself:

npm install
node server.js   # listens on :8080, MCP at /mcp

MIT licensed.

Frequently asked questions

What is Gig Worker Tax Toolkit?

2026 quarterly tax estimates, SE tax, safe harbor and mileage for 1099 gig workers.

How do I install Gig Worker Tax Toolkit?

It runs as a remote server. In Claude Code: claude mcp add --transport http gig-worker-tax-toolkit 'https://gig-tax-mcp.mcpize.run/mcp'. For other clients, paste the JSON configuration from this page into their MCP settings.

Does Gig Worker Tax Toolkit need an API key?

Its registry entry lists no required key or secret. Some features may still need an account with the service it connects to.

Is Gig Worker Tax Toolkit open source?

Yes. Its code is on GitHub under the MIT license.

Who maintains Gig Worker Tax Toolkit?

It is published by tylerscomic-lab. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.