Guanajuato → Guanajuato · Autopista 45D Celaya-Querétaro
What does it actually cost to drive from Celaya, Guanajuato, to Salamanca, Guanajuato? The hard numbers: 50 km (31 miles) of pavement primarily along Autopista 45D Celaya-Querétaro, 33m behind the wheel, and roughly MXN 101.64 in fuel alone — that is 4.2 liters (1.1 gallons) of gasolina Magna at a 24.20 MXN/liter benchmark. Anyone leaving Celaya, the polo industrial automotriz Honda y Mazda del corredor del Bajío, typically carries samples, signed proposals, or service equipment to deliver in Salamanca, the sede de la refinería Ing. Antonio M. Amor de Pemex, and aims to be home the same evening. It is worth confirming whether the haul fits inside your daily hours-of-service window or whether an overnight at a midpoint hotel makes more sense. Applying the tarifa promedio de mercado mileage rate of MXN 6.50/km (MXN 10.46/mile), the gross outbound reimbursement settles at MXN 325.00. Attach the visit purpose, client name, and plate number to the Clara receipt so the journal entry lands directly in the business-travel expense account. For the US professional driving the 50 km (31 mi) between Celaya and Salamanca, reimbursement of MXN 325.00 stays non-taxable to the employee when the employer follows an accountable plan under Treas. Reg. §1.62-2 and reimburses at or below the IRS standard mileage rate. US employers generally reimburse at the IRS standard mileage rate so the payment stays non-taxable to the employee under Pub. 463. Keep the IRS-compliant expense report (Form 1040 Schedule C, line 9) alongside the fuel receipt from any EIA-tracked retail station network pump used along the leg; Internal Revenue Service (IRS) examiners pull contemporaneous mileage logs first when auditing Schedule C unreimbursed business expenses, and the Celaya→Salamanca corridor must show date, business purpose, and odometer readings.