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Section 179 deduction MCP server

Section 179, bonus depreciation and vehicle limits for 2025 and 2026, plus the after-tax cost of an asset loan.

Connect free Source on GitHub

Free. No key, no sign-in, no paid tier. 4 tools.

Connector URL

https://section-179-deduction-calculator-mcp.lipmichal.workers.dev/mcp

Paste it as a custom connector in Claude, or add it to Claude Code, Cursor or VS Code. Setup for each is below.

What it knows that a model does not

A model answers from training data. This server reads the source when you ask.

  • The Section 179 limit is $2,500,000 for 2025 and $2,560,000 for 2026, with a $4,090,000 phase-out start (Rev. Proc. 2025-32).
  • Bonus depreciation is 100% again for property acquired after January 19, 2025. The contract date decides it, not delivery.
  • The 2026 heavy SUV cap is $32,000 and the first-year cap on a car of 6,000 lb or less is $20,300 with bonus.

Sources IRS Pub. 946, Form 4562 instructions, Rev. Proc. 2025-32 and 2026-15.

Tools (4)

Read from the live server with tools/list on 2026-11-02.

ToolWhat it does
calculate_section_179 Section 179 deduction (2025-2026). Calculates the Section 179 expense deduction as Form 4562 Part I does, with the limits raised by the One Big Beautiful Bill Act: $2,500,000 for 2025 with a dollar-for-dollar phase-out above $4,000,000 of section 179 property (2025 Form...
calculate_bonus_depreciation Bonus depreciation rate and amount (168(k)). Finds the special (bonus) depreciation rate under IRC 168(k) from the acquisition and placed-in-service dates and applies it after any Section 179 deduction.
get_vehicle_depreciation_limits Vehicle limits: heavy SUV cap and luxury auto caps. Returns the first-year write-off limits for a business vehicle by gross vehicle weight rating: passenger automobiles of 6,000 lb or less are held to the IRC 280F caps ($20,300 first year with bonus, $12,300 without, for 2026 per Rev.
calculate_asset_loan_payment Asset loan payment and after-tax cost. Calculates the exact monthly payment, total interest and first-year interest for an equipment, truck, tractor, RV, land, manufactured home, ATV, pontoon or other asset loan, and, for business assets, the after-tax cost: first-year tax...

Connect it

One URL, no token. Pick your app.

Claude.ai and Claude Desktop

Open Settings, then Connectors, then Add custom connector. Paste the URL. Leave the OAuth fields empty. Save.

https://section-179-deduction-calculator-mcp.lipmichal.workers.dev/mcp

Claude Code

Run this in your terminal. Then run claude mcp list to check it.

claude mcp add --transport http section-179-deduction-calculator https://section-179-deduction-calculator-mcp.lipmichal.workers.dev/mcp

Cursor

Merge this into ~/.cursor/mcp.json (all projects) or .cursor/mcp.json (one project).

{
  "mcpServers": {
    "section-179-deduction-calculator": {
      "url": "https://section-179-deduction-calculator-mcp.lipmichal.workers.dev/mcp"
    }
  }
}

VS Code

Put this in .vscode/mcp.json. The top key is servers, not mcpServers.

{
  "servers": {
    "section-179-deduction-calculator": {
      "type": "http",
      "url": "https://section-179-deduction-calculator-mcp.lipmichal.workers.dev/mcp"
    }
  }
}

Things to ask

Paste one into a new chat after you connect.

Sourcegithub.com/theluckystrike/section-179-deduction-calculator-mcp Web calculatorAssetLoanCalculator

Questions

Is the section 179 deduction MCP server free?
Yes. The hosted URL is free and needs no token, key or account. The source is open on GitHub.
Why not just ask the model?
A model answers from its training data. That data stops at a cutoff date, and long sums can drift. This server reads its data or rules each time you ask, so the answer is current and exact.
Where does the data come from?
IRS Pub. 946, Form 4562 instructions, Rev. Proc. 2025-32 and 2026-15.
Which apps can use it?
Any MCP client that accepts a remote server URL: Claude.ai and Claude Desktop custom connectors, Claude Code, Cursor, VS Code and others. You can also run it locally with npx.

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