Guanajuato → San Luis Potosí · Autopista 45D Celaya-Querétaro
The drive from Celaya, Guanajuato, to San Luis Potosí, San Luis Potosí, covers about 228 km (142 miles) along Autopista 45D Celaya-Querétaro, with an estimated travel time of 2h 32m in normal traffic conditions. Celaya is the polo industrial automotriz Honda y Mazda del corredor del Bajío, while San Luis Potosí stands out as the capital potosina y nodo logístico que conecta el Bajío con el norte del país. Sales reps, consultants, real-estate agents and field service professionals who run this route regularly typically depart at sunrise to clear the urban congestion before rush hour and arrive in time for scheduled morning meetings. It also pays to scout two or three reliable fuel-and-rest stops along the way before departure. Assuming average fuel economy of about 28 mpg on gasolina Magna, the trip burns roughly 19 liters (5.0 gallons), costing about MXN 459.80 at typical pump prices. For mileage reimbursement, applying the tarifa promedio de mercado of MXN 6.50/km (MXN 10.46/mile) yields a one-way payout of MXN 1482.00. Keep the trip log, business purpose, odometer readings, and exact route documented in your Clara receipt for IRS compliance and internal audit defensibility. For the UK professional driving the 228 km (142 mi) between Celaya and San Luis Potosí, reimbursement of MXN 1482.00 fits the subsistence allowance regime when paid at or below HMRC AMAP rates of 45p per mile for the first 10,000 business miles in the tax year. UK firms reimburse at HMRC AMAP rates (45p / 25p per mile) so the payment stays free of PAYE and NIC under approved mileage allowance payments rules. Retain a VAT receipt accepted by HMRC for input-tax recovery from the BEIS-tracked forecourt network forecourt used to refuel; His Majesty's Revenue and Customs (HMRC) compliance officers cross-reference fuel VAT receipts with the P11D return when reimbursement exceeds the approved rate. Excess paid above AMAP on the Celaya→San Luis Potosí run must be reported via PAYE settlement agreement or it becomes a benefit-in-kind on the employee's tax code.