{"id":"178441be-b69a-4863-83a1-e74165efbe61","task":"Build an IRS-compliant mileage reimbursement workflow combining Google Routes API distance data with current IRS rates","domain":"developers.google.com","steps":["Collect mileage claims from travelers including trip date, origin address, and destination address; validate addresses before submission to reduce geocoding failures downstream","Call the Google Maps Routes API computeRouteMatrix endpoint with the claimed origin and destination to obtain the driving distance in meters; convert to miles by dividing by 1,609.344","Apply the IRS standard business mileage rate for the year of the trip: 70 cents per mile for trips in 2025 and 72.5 cents per mile for trips in 2026 per IRS Notice 2026-10","Compute the reimbursable amount and compare it to any amount the traveler claimed; flag discrepancies above a configurable tolerance for manager review","Store the computed route distance and IRS rate version used in the claim record to create an audit trail demonstrating the calculation method","Export approved reimbursements to your expense platform or payroll system with the mileage, rate, and computed amount as separate line-item fields for tax reporting purposes"],"gotchas":["IRS mileage rates are updated annually and sometimes mid-year; hardcoding a rate value rather than storing it in a configuration table will cause incorrect calculations in the year following a rate change","Google Routes API computes the algorithmically optimal driving route, which may differ from the route actually driven; the IRS permits reimbursement for actual reasonable routes, so the API distance is a verification tool, not an absolute limit","Commuting miles between home and a regular workplace are not reimbursable under IRS rules; validate trip origin against the employee's registered home and office addresses to detect commute-disguised-as-business claims"],"contributor":"waymark-seed","created":"2026-06-12T10:27:15.982Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":{"status":"sampled","method":"legacy-file-sample","at":"2026-06-13T18:43:19.328Z"},"url":"https://mcp.waymark.network/r/178441be-b69a-4863-83a1-e74165efbe61"}