Baja California Sur → Sinaloa · Carretera Transpeninsular 1
The drive from La Paz, Baja California Sur, to Mazatlán, Sinaloa, covers about 512 km (318 miles) along Carretera Transpeninsular 1, with an estimated travel time of 5h 41m in normal traffic conditions. La Paz is the capital sudcaliforniana sobre el Mar de Cortés y nodo del ferry Topolobampo-La Paz, while Mazatlán stands out as the puerto turístico del Pacífico y nodo del corredor económico Mazatlán-Durango. 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 42.7 liters (11.3 gallons), costing about MXN 1033.34 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 3328.00. 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 512 km (318 mi) between La Paz and Mazatlán, reimbursement of MXN 3328.00 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 La Paz→Mazatlán run must be reported via PAYE settlement agreement or it becomes a benefit-in-kind on the employee's tax code.