About Gig Worker Tax Toolkit
A tax-planning MCP server for 1099 gig workers and freelancers, estimating 2026 federal quarterly taxes, self-employment tax, and mileage deductions. Its mileage calculation applies the rate change by trip date, and it also checks safe-harbor payments.
Key features
- 01Estimate quarterly federal taxes
- 02Calculate self-employment tax and eligible QBI deduction
- 03Calculate mileage deductions by trip date
- 04Check estimated-tax safe harbor
- 05Compare standard mileage with actual expenses
- 06Look up tax figures and sources
Use cases
- 01Plan quarterly taxes for DoorDash or Uber income
- 02Calculate mileage across the 2026 rate change
- 03Check whether estimated payments meet safe harbor
MCP support
Provides tools for quarterly tax estimates, mileage deductions, safe-harbor checks, vehicle expense comparisons, and tax-constant lookups. The README does not specify how it interacts with MCP clients.
Configuration
Remote servers need no local install. Pick your client, then copy the config or install in one click.
https://gig-tax-mcp.mcpize.run/mcpclaude mcp add --transport http tylerscomic-lab-gig-tax https://gig-tax-mcp.mcpize.run/mcp{"mcpServers":{"tylerscomic-lab-gig-tax":{"type":"http","url":"https://gig-tax-mcp.mcpize.run/mcp"}}}Open in Cursor{"servers":{"tylerscomic-lab-gig-tax":{"type":"http","url":"https://gig-tax-mcp.mcpize.run/mcp"}}}Open in VS Code{"mcpServers":{"tylerscomic-lab-gig-tax":{"type":"http","url":"https://gig-tax-mcp.mcpize.run/mcp"}}}{"mcpServers":{"tylerscomic-lab-gig-tax":{"serverUrl":"https://gig-tax-mcp.mcpize.run/mcp"}}}Run commands in a terminal; paste JSON into the client’s MCP config and restart. Servers that need sign-in will prompt on first connect.
Tools
Details
From the project READMEGig 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.
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