How are different expense categories treated in Spain for reimbursement?

In Spain, expense categories are treated in various ways for reimbursement, and many have specific requirements regarding taxability

Taxable Categories

Mobile Phone Usage: Taxable and must be grossed up unless business and personal use are clearly separated.\

Home Broadband and Line Rental: Home broadband costs and telephone line rental or standard monthly charges are considered taxable benefits and must be included in payroll.

Medical Check-Ups and Private Insurance: Medical checkups and private insurance are treated as part of an allowance and are fully taxable, requiring payroll gross-up.

Non-Compliant or Flagged Expenses: Expenses that do not meet legislative or documentation requirements but are approved by the manager are treated as taxable and included in payroll with gross-up.

Fuel: Fuel expenses are considered taxable when they are not linked to an approved car rental agreement. Fuel purchased for use with a personal vehicle cannot be reimbursed as a standalone business expense. To be reimbursed for business use of a personal vehicle, employees must submit a mileage claim, which already includes compensation for fuel costs.

Expenses with Special Requirements

Mileage: Mileage is reimbursed at the statutory rate of EUR 0.25 per kilometer. The rate may be revised in line with updates from the Spanish tax authorities. Mileage claims must comply with AEAT requirements regarding business purpose and travel routes.

Parking and Tolls: Parking fees and tolls incurred during business travel are reimbursable. Parking fines, clamping fines, or penalties are never reimbursed. Tolls should be supported by receipts where possible, or clearly explained if unavailable.

Per Diem Allowances: Per diem allowances for accommodation and living expenses are tax free up to statutory limits, provided the employee travels outside their usual place of work and residence.

• For domestic travel within Spain with overnight stay, up to EUR 53.34 per day is tax free (with any excess treated as taxable).
• For travel abroad with overnight stay, up to EUR 91.35 per day is tax free.
• For business travel without overnight stay, tax-free allowances are limited to EUR 27.50 per day within Spain and EUR 48.08 per day abroad.

Non-Taxable Expenses

These include business travel transportation, accommodation during business travel, reasonable meals during business travel, client and staff entertaining when reasonable and properly documented, computer equipment and software used exclusively for business purposes, stationery and office supplies, dongles and data cards, foreign currency exchange commissions, approved work permits and visas, business-related training, professional institute and association memberships related to the job role, travel insurance when approved, and exceptional business-related cancellation costs, provided all expenses are wholly, exclusively, and necessarily incurred for business purposes and supported by compliant documentation.

For all expense types, proper documentation is mandatory, including VAT-compliant invoices or itemized receipts where required. Expenses must be incurred solely for business purposes, approved by the supervisor, and submitted within the required timeframe to ensure compliant reimbursement under Spanish tax regulations