DIAN documentation for sales-rep travel allowances in Colombia: what survives an audit
Colombia's DIAN scaled up sales-rep travel-allowance audits in 2026. The documentation folder that survives.
Why DIAN is watching travel allowances in 2026
DIAN's 2026 Audit Plan flagged sales-rep travel allowances as one of six priority targets. During 2024-2025, many companies shifted parts of compensation into 'viáticos' to dodge social-security contributions and withholding. DIAN responded with mass cross-referencing between PILA (payment ledger) and travel-allowance reports.
Occasional vs permanent
Article 130 of the Tax Statute distinguishes:
- **Occasional**: paid for a specific trip. Not labor income, not in the employee's income certificate, deductible to the company. - **Permanent**: paid regularly as part of the role's package. Labor income, subject to withholding and social-security/parafiscal contributions.
Monthly payments at similar amounts are presumed permanent unless the company proves otherwise.
Minimum documentation per trip
Signed policy, prior authorization, trip log (date, route, specific business purpose), receipts (e-invoice for fuel, tolls, lodging, meals), expense report approved within 30 days, and bank payment confirmation. Missing any of these is a common cause of disallowed deductions.
Mileage rate
DIAN sets no rate. 2026 market: COP 1,200-1,800/km depending on vehicle and region. Document the methodology, apply equally to comparable roles, and revisit quarterly against published fuel prices.
Withholding exposure
When DIAN reclassifies viáticos as permanent salary, the cost compounds: withholding for the last 4 years, social-security and parafiscal contributions, 100% surcharges, and statutory interest. A 12-rep, 3-year case typically costs COP 800M-1.2B.
Common mistakes
Flat monthly payments with no link to real travel; year-end reconstructed logs; missing fuel/lodging receipts; cash payments without bank trace; policies not updated in 3 years; reimbursement >50% of base salary with no detailed documentary justification.