Paying an Overseas Software Vendor: Terms, Milestones and Currency

Payment terms do more practical risk management in a cross-border engagement than most contract clauses, because they determine how much you stand to lose at any given moment. Structuring them well protects both sides and makes disputes less likely.

Keep exposure small and rolling

The principle is simple: at no point should either party be owed so much that walking away becomes attractive. Monthly billing on time and materials, or milestone billing on fixed scope, achieves this. Large upfront payments transfer risk entirely to you; long payment terms transfer it entirely to the vendor, and a vendor under cash pressure delivers worse work.

Make milestones verifiable

• Tie each milestone to something demonstrable, not to elapsed time.
• Define what acceptance means before work starts.
• Agree how long you have to review, so payment is not blocked indefinitely.

Vague milestones such as backend complete cause more disputes than any other single contract feature.

Agree the currency and who carries the movement

Contracts are commonly denominated in US dollars or euros. What matters is that the currency is stated, that the party carrying exchange-rate movement is identified, and that bank charges are allocated. Unstated assumptions here produce awkward conversations about invoice shortfalls.

Expect compliance paperwork

Cross-border payments involve documentation on both sides, and international transfers can take several working days. Building that into your schedule avoids a milestone being technically unpaid because of banking timelines rather than any dispute.

Retention, used carefully

Holding a small percentage until final acceptance is a reasonable protection on fixed-scope work. Held too long or set too high, it becomes a source of friction and signals distrust. A modest retention released on a defined date is better than a large one released at your discretion.

Pay on time

Reliability is reciprocal. Buyers who pay predictably get better teams assigned to them and more goodwill when they need something unplanned, which is worth considerably more than the float.