IRS Mileage Rate and Per Diem

io.github.theluckystrikePublished by GitHub account theluckystrikev1.0.0Updated Nov 3, 2026

IRS mileage rates 2011-2026 (76 cents from July 2026), GSA per diem by ZIP FY2026-27, high-low.

VerifiedStreamable HTTPWeb executable

Overview

IRS Mileage Rate and Per Diem's hosted MCP server (irs-mileage-rate-per-diem-mcp.lipmichal.workers.dev); no sign-in required; Streamable HTTP; 5 tools.

No AI overview yet: these facts come from the registry entry and the server itself.

Endpoint
irs-mileage-rate-per-diem-mcp.lipmichal.workers.dev
Last checked

Installation

In SourceWeft

  1. Open IRS Mileage Rate and Per Diem in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/io.github.theluckystrike%2Firs-mileage-rate-per-diem-mcp/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config.

{
  "mcpServers": {
    "irs-mileage-rate-and-per-diem": {
      "type": "http",
      "url": "https://irs-mileage-rate-per-diem-mcp.lipmichal.workers.dev/mcp"
    }
  }
}

README

irs-mileage-rate-per-diem-mcp

An MCP server that gives an AI assistant the official IRS standard mileage rates, including the July 1, 2026 increase to 76 cents a mile, the GSA per diem rates for every ZIP code for FY2026 and FY2027, and the IRS high-low per diem rates from Notice 2026-60. It calculates mileage deductions and trip per diem with the right rate for each date.

Hosted endpoint, no sign-in and no token:

https://irs-mileage-rate-per-diem-mcp.lipmichal.workers.dev/mcp

Tools

ToolWhat it does
get_mileage_rateIRS business, medical, charity and military moving rates for a year or date (2011-2026), the depreciation part of the business rate and the FAVR / employer-vehicle maximum value.
calculate_mileage_deductionDeduction or tax-free reimbursement for a list of trips, each at the rate in force on its date. Splits 2026 at July 1 and returns the basis reduction for business miles.
get_per_diem_ratesGSA maximum lodging by month and M&IE for a ZIP code or city, with the meal breakdown and the 75% first and last day amount. FY2026 and FY2027.
calculate_trip_per_diemMaximum per diem for a trip: each night at that month's lodging rate (across seasons and the Oct. 1 fiscal year change), M&IE with 75% on travel days, minus provided meals.
get_high_low_per_diemIRS high-low rates, the meals portion, transportation industry M&IE and incidentals rate for a date, and whether a city is a high-cost locality on that date.

Every result has structured JSON, a plain-English summary, as_of, source (the irs.gov or gsa.gov document) and more (a self-employed tax calculator on taxbreakcalc.com).

What it knows that your model does not

  • The IRS raised the 2026 business mileage rate mid-year: 72.5 cents a mile from Jan. 1 to June 30, 2026 and 76 cents from July 1, 2026 (Announcement 2026-11). Medical and military moving went from 20.5 to 23.5 cents. Charity stays at 14 cents.
  • The depreciation part of the 2026 business rate is 35 cents a mile. The FAVR and employer-vehicle maximum value for 2026 is $61,700 (Notice 2026-10).
  • FY2027 GSA per diem (from Oct. 1, 2026): standard CONUS rate $113 lodging and $68 M&IE, and the rates for 295 named destinations by month.
  • IRS high-low method from Oct. 1, 2026: $329 high and $230 low, with $86 and $74 treated as meals (Notice 2026-60). Tucson, San Mateo, Albuquerque and Cody were added; Panama City was removed.
  • The IRS had not announced the 2027 mileage rates on 2026-11-03. The tools say so.

Install

Claude.ai custom connector or ChatGPT developer mode

Add a custom connector and paste the URL. No token is needed.

https://irs-mileage-rate-per-diem-mcp.lipmichal.workers.dev/mcp

Claude Code

claude mcp add --transport http mileage-per-diem https://irs-mileage-rate-per-diem-mcp.lipmichal.workers.dev/mcp

Or run it locally:

claude mcp add mileage-per-diem -- npx -y github:theluckystrike/irs-mileage-rate-per-diem-mcp

Claude Desktop

Add this to claude_desktop_config.json:

json
{  "mcpServers": {    "mileage-per-diem": {      "command": "npx",      "args": ["-y", "github:theluckystrike/irs-mileage-rate-per-diem-mcp"]    }  }}

Cursor

Add this to ~/.cursor/mcp.json:

json
{  "mcpServers": {    "mileage-per-diem": {      "url": "https://irs-mileage-rate-per-diem-mcp.lipmichal.workers.dev/mcp"    }  }}

VS Code

Add this to .vscode/mcp.json:

json
{  "servers": {    "mileage-per-diem": {      "type": "http",      "url": "https://irs-mileage-rate-per-diem-mcp.lipmichal.workers.dev/mcp"    }  }}

Node 20 or newer is needed for the local npx version.

Example prompts

  • "What is the IRS mileage rate for 2026? Did it change during the year?"
  • "I drove 6,200 business miles from January to June 2026 and 5,800 from July to December. What is my deduction?"
  • "What is the per diem for ZIP 02110 in March 2027?"
  • "Calculate the per diem for a trip to Washington DC from September 29 to October 2, 2026, with lunch provided one day."
  • "What are the IRS high-low per diem rates from October 2026, and is Chicago high-cost in November?"

Data sources

IRS Notice 2026-10, Announcement 2026-11, Notice 2025-5, the IRS standard mileage rates table, Notices 2026-60 and 2025-54, the GSA FY2026 and FY2027 per diem ZIP code files and the GSA M&IE breakdown table, all fetched on 2026-11-03. See DATA_SOURCES.md.

Limitations

  • General information, not tax advice.
  • Per diem covers the continental U.S. (CONUS) only. Alaska, Hawaii, territories and foreign rates (OCONUS, set by the Department of Defense and State Department) are not included.
  • GSA rates for FY2026 and FY2027 only. Mileage rates for 2011 to 2026.
  • Some ZIP codes span more than one per diem area. The tools list every match; pick by the county the lodging is in.
  • The trip calculator applies the federal travel rules (75% M&IE on the first and last day). Your employer's policy can differ.

More

Self-employed and tracking deductions? Use the self-employed set-aside calculator on taxbreakcalc.com.

Part of the Zovo MCP collection: https://mcp.zovo.one

Development

npm installnpm run buildnpm test

src/core.ts holds the rates and rules and has no I/O. src/gsa.ts and src/highcost.ts are generated from the GSA files and Notice tables. src/stdio.ts is the local entry and src/worker.ts is the Cloudflare Worker entry. Both use the same tool registry in src/tools.ts.

License

MIT

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The paid back-office collection (invoices, VAT, PDFs, spreadsheets) is at https://mcp.zovo.one

Source: README.md at commit e8b98da

Tools

5

get_mileage_rate

IRS standard mileage rates (2011-2026, incl. the July 2026 increase)

Returns the official IRS standard mileage rates in cents per mile for business, medical, charity and military moving use, for a year or a specific date. Knows the mid-year 2026 change: 72.5 cents for business from Jan. 1 to June 30, 2026 (Notice 2026-10) and 76 cents from July 1, 2026 (Announcement 2026-11, fuel price increase), medical/moving 20.5 then 23.5 cents, charity 14 cents. Also returns the depreciation (basis reduction) part of the business rate (35 cents for 2026) and the FAVR / employer-vehicle maximum value ($61,700 for 2026). 2027 rates are not announced yet and the tool says so.

Parametersdateyear

calculate_mileage_deduction

Mileage deduction or reimbursement calculator

Calculates the deduction or tax-free reimbursement for driven miles at the IRS standard mileage rates, splitting by the date each trip was driven. Applies the 2026 mid-year increase automatically (72.5 cents before July 1, 76 cents from July 1). Supports business, medical, charity and military moving miles, returns the amount per rate period and purpose, and the depreciation basis reduction for business miles. Notes who can and cannot deduct (employees' unreimbursed mileage is not deductible after the One, Big, Beautiful Bill Act).

Parameterstripsrequireddefault_purpose

get_per_diem_rates

GSA per diem rates by ZIP or city (FY2026 and FY2027)

Returns the official GSA federal per diem rates for a U.S. (CONUS) destination by ZIP code or city/state: maximum lodging per night by month and the meals and incidental expenses (M&IE) rate with its breakfast/lunch/dinner/incidentals breakdown and the 75% first/last-day amount. Covers FY2026 (Oct. 1, 2025 - Sept. 30, 2026) and FY2027 (from Oct. 1, 2026; standard rate $113 lodging and $68 M&IE). Data from GSA's FY2026 and FY2027 ZIP code files, so it knows rates newer than a model's training data.

Parameterszipcitydatestatefiscal_year

calculate_trip_per_diem

Trip per diem calculator (GSA rates)

Calculates the maximum federal per diem for a business trip: lodging for each night at that month's GSA rate (crossing seasons and the Oct. 1 fiscal year change), M&IE for each day with 75% on the first and last day, minus meals provided at the GSA breakdown amounts. Uses the official FY2026 and FY2027 GSA rates for trips between Oct. 1, 2025 and Sept. 30, 2027.

Parameterszipcitystateend_daterequiredstart_daterequiredmeals_provided

get_high_low_per_diem

IRS high-low per diem rates and high-cost localities

Returns the IRS high-low substantiation method rates for a date and whether a city is a high-cost locality then: from Oct. 1, 2026 $329 high / $230 low with $86 / $74 treated as meals (Notice 2026-60); Oct. 1, 2025 - Sept. 30, 2026 $319 / $225 (Notice 2025-54). Also the transportation industry M&IE ($80 CONUS, $86 OCONUS) and the $5 incidental-expenses-only rate. Checks the 91 FY2027 high-cost localities and their seasonal portions (e.g. Tucson added, Panama City removed).

Parameterscitydatestate

Version history

1
  1. v1.0.0LatestNov 3, 2026

Score

100% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 daysRequired25 pts
  • Auth declaredRequired10 pts
  • Tools listedRequired15 pts
  • DescriptionRequired15 pts
  • Logo10 pts
  • Documentation15 pts
  • License10 pts