Compare the Funding Route
An advance supplies money before spending. Reimbursement follows spending initially financed by the spender. The choice affects who carries the cash need; it does not establish that the trip, expense or payment is permitted. Confirm the actual funding arrangement and approval route before commitments.
| Question | Advance | Reimbursement |
|---|---|---|
| Who carries the initial cash need? | Organization prefunds an authorized amount | Spender needs capacity to pay first; do not presume it |
| What spending evidence follows? | Account for actual use with required supporting records | Claim actual supported spending under the applicable arrangement |
| What happens to unused money? | Identify and account for unused advance separately | No advance balance to return; do not claim an unspent estimate |
| What permission is needed first? | Trip, prefunding and spending authority under actual terms | Trip/spending permission and agreed reimbursement route; personal payment alone does not establish entitlement |
These four questions are OpenAid's comparison, not a source-prescribed travel policy.
The Same Fictional Trip
All figures are invented USD. An approved three-day site visit includes two nights. Estimate: transport 90, lodging 2 x 70 = 140, meals 3 x 25 = 75; total 305.
The complete actual disbursement, supported by receipts, is transport 85, lodging 140 and meals 55: total 280. There are no other payments or missing receipts in this example. A receipt supports an amount; actual acceptability and authorization still require review.
With an authorized 305 advance, 305 - 280 = 25 is unused. Record the actual return or other authorized disposition separately; do not label it returned without evidence. With reimbursement, the person has initially paid 280 and prepares a 280 claim pending review and approval. They do not claim the 305 estimate or treat the lower meal spend as an automatic allowance.
Where Each Route Raises Problems
For an advance:
- Missing support prevents a complete settlement, even if the balance adds up.
- Unused cash needs an evidenced disposition; an expense approval does not prove a return occurred.
For reimbursement:
- A spender may be unable to prefinance the trip. Ask before relying on this route.
- Personal payment can precede approval, creating an unresolved claim rather than a guaranteed repayment.
What the Choice Does Not Decide
Neither route determines expense eligibility, tax treatment, a required deadline or who may approve. Separate trip permission, transaction evidence, review, approval and actual transfer. Use the advance settlement preparation for that later task; this comparison does not perform it.
Sources and Scope
UNDP's undated Global Fund implementation page distinguishes prefunding and reimbursement, including prefinancing capacity/prior consultation, in its own arrangements. UNFPA's September 2016 project-advance policy is a historical direct-implementation example; its currency is unverified and no deadlines, thresholds or identity collection are adopted. CC8 (November 27, 2024, England and Wales) and ACNC's undated Australian guidance inform financial checks/delegations. The trip and comparison are original practice, not institutional travel rules. Checked November 1, 2026.