If your multi-year engineering contract is priced in euros or Australian dollars but delivered by a Vietnam-based team, currency movement on the VND exchange rate will affect your actual cost on invoice settlement-independent of engineering performance. As of October 2026, the EUR/VND rate sits near 29,000 and the AUD/VND rate near 18,100, but both have moved far wider than that over the past five years, with the Euro ranging roughly between 23,000 and 31,500 VND and the Australian dollar between 15,000 and 19,100 VND.
On a two-year contract, that range is wide enough to turn a well-negotiated day rate into a budget problem, or into an unexpected margin gain, depending on which side of the contract absorbs the swing. The practical fix is not to predict the rate. It is to decide, in the contract itself, who carries the risk and under what conditions the price resets.
TL;DR
EUR/VND and AUD/VND have both moved by double-digit percentages over five years; a multi-year engineering contract without a currency clause leaves that movement unassigned.
Three contractual mechanisms exist to manage this: economic price adjustment bands, settlement-currency decoupling, and financial hedging instruments such as forward contracts.
Vietnam-based delivery partners can offer forward contracts with terms from 3 to 365 days, typically with a 0-10% security deposit, which caps exposure without requiring the client to run a treasury desk.
Currency options exist for EUR/USD or AUD/USD pairs but are not written directly against the VND, which limits their usefulness for a Vietnam-settled contract.
The decision that matters most is made at contract signing, not during a rate spike: who absorbs movement inside an agreed band, and what triggers a renegotiation outside it.
About the Author: 724SOFTWARE is a Vietnam-based engineering partner delivering multi-year dedicated-team and ODC engagements for clients in Australia, the Netherlands, Germany, and Finland, with contracts commonly running 12 to 24 months across Fintech, capital markets, and enterprise platforms. Structuring currency terms into long-running delivery contracts is a recurring part of commercial negotiation with these clients, not a theoretical exercise.
What Is Currency Risk in an Offshore Engineering Contract?
Currency risk in this context is the chance that the value of a contract, measured in the buyer's home currency, changes between the day the price is agreed and the day each invoice is settled, purely because of exchange rate movement. This is distinct from scope risk or delivery risk. The engineering work can be delivered exactly as specified, on time, at the agreed day rate in VND, and the buyer in Melbourne or Amsterdam can still end up paying more or less than budgeted in AUD or EUR terms.
Three sub-types of this risk show up specifically in multi-year engineering contracts:
Transaction risk: the gap between the rate on the invoice date and the rate on the contract date, affecting every periodic payment across the engagement .
Translation risk: relevant mainly to the buyer's own accounting, where VND-denominated service costs must be restated in home-currency financial statements each reporting period.
Economic risk: the longer-run effect of sustained currency drift on whether offshore delivery remains cost-competitive against onshore hiring over the life of a two or three-year contract.
For a 12-24 month engineering engagement, transaction risk is the one that shows up on a monthly invoice and the one contract clauses are built to manage.
Why Does the Dong-Euro-Dollar Relationship Matter for a Multi-Year Contract?
A multi-year contract is exposed to currency movement for longer than a single project, which is precisely why the mechanism matters more here than for short-term work. A six-week engagement settled at a fixed quote has almost no exposure window. A 24-month dedicated team contract, billed monthly against actual hours, has 24 separate exposure points.
The five-year ranges illustrate the scale of what a contract without a currency clause is exposed to. The EUR/VND rate has moved between roughly 23,000 and 31,500, a spread of more than 35% from trough to peak. The AUD/VND rate has moved between roughly 15,000 and 19,100, a spread of over 27%. Neither of these ranges happened in a single quarter; they played out over years, which is exactly the duration of a typical dedicated-team engagement. A contract signed near one end of that range and held at a fixed VND rate for 24 months can see the buyer's effective cost in euros or Australian dollars drift materially from the number in the original budget approval, entirely independent of team performance.
This is the mechanism driving forex rates generally: central bank interest rate decisions, inflation differentials, and macro data releases in Vietnam, the Eurozone, and Australia all move independently of each other and independently of anything happening inside the engineering contract. A CTO budgeting a 24-month ODC engagement is implicitly also taking a position on Vietnamese, Eurozone, and Australian monetary policy, whether that is acknowledged in the contract or not.
How Should a Contract Actually Address This?
Three mechanisms exist, and they are not mutually exclusive. A well-structured multi-year contract usually combines two of them].
1. Economic price adjustment clauses. These set a tolerance band, for example +/-5% on the EUR/VND rate at signing, inside which pricing stays fixed. If the rate moves outside the band, the contract triggers a pre-agreed adjustment formula rather than an ad hoc renegotiation. This is the mechanism most engineering services contracts should include as a baseline, because it converts an open-ended risk into a bounded, pre-agreed process.
2. Settlement-currency decoupling. Rather than pricing the contract in VND and converting monthly, the contract fixes the price in the buyer's currency (EUR or AUD) and the delivery partner absorbs the VND conversion internally. This shifts transaction risk from the buyer to the provider. It only works if the provider has the margin structure and hedging capability to carry that risk across the contract term, which is why not every Vietnam-based provider can offer it on long engagements.
3. Financial hedging instruments. Forward contracts let a party lock in a specific exchange rate for a future settlement date, removing the guesswork for that period. Vietnam-based providers typically access forward contracts with terms from 3 to 365 days, with costs built into the exchange rate margin and a security deposit usually between 0% and 10% of the contract value. Currency options are also available but are written against pairs like EUR/USD or AUD/USD rather than directly against the VND, which limits their direct applicability to a Vietnam-settled contract and usually means they are used one layer removed, hedging the buyer's own currency exposure rather than the VND leg.
Mechanism | Who typically carries the risk | Best fit
|
|---|---|---|
Price adjustment band | Shared, within agreed tolerance | Contracts where both parties want predictability without full hedging cost |
Settlement-currency decoupling | Provider | Buyers who want zero currency exposure and are willing to pay for that certainty |
Forward contracts | Whoever initiates the hedge | Contracts with large monthly billing where even a single bad settlement month is material |
Is It Worth Trying to Forecast the AUD to VND Rate Over a Contract Term?
Forecasting is a weaker tool than hedging for a multi-year commitment, and this follows directly from the mechanism described above: short-term forex prices move on interest rate decisions, inflation prints, and employment data that have not happened yet. Any AUD to VND forecast published today is a snapshot of current expectations, not a guarantee, and a 24-month contract will outlive several rate decision cycles in both Australia and Vietnam.
This is the author's view, not a verified industry statistic: treating a forecast as the basis for pricing a multi-year contract is a mistake many buyers make once. The more durable approach is to build the contract so that the actual rate on each invoice date, whatever it turns out to be, is handled by a pre-agreed mechanism rather than a forecast made at signing.
Frequently Asked Questions
Does a weaker Dong make Vietnam-based engineering cheaper over time?
Only if the contract is priced in VND and the buyer settles in a stronger currency without a price adjustment band; the five-year AUD/VND and EUR/VND ranges show this can move substantially in either direction
Who normally proposes the currency clause, buyer or provider?
Either party can propose it, but it should be resolved before the statement of work is signed, not after the first rate-driven invoice dispute.
Can a dedicated team contract be priced entirely in EUR or AUD to avoid this?
Yes, through settlement-currency decoupling, though the provider will typically price in a margin to cover its own VND conversion exposure across the contract term.
Is a 5% price adjustment band standard?
Band size is a negotiation point, not a fixed industry number; it should reflect the historical volatility range relevant to the specific currency pair and contract duration.
Do forward contracts work for monthly ODC invoicing?
Yes. Forward contracts with terms as short as 3 days or as long as 365 days can be laddered against a monthly billing cycle to lock in rates progressively across the contract.
Does exchange rate risk affect fixed-bid projects the same way?
No. A short fixed-bid engagement has a narrow exposure window; the mechanisms above are built for engagements measured in months or years, which is the premise of a dedicated team or ODC model rather than one-off project work.
About 724SOFTWARE
724SOFTWARE is a Vietnam-based engineering partner for dedicated teams and offshore development centers, delivering multi-year engagements for clients in Fintech, capital markets, and enterprise software across Australia, the Netherlands, Germany, and Finland. The company is aligned with ISO 9001 and ISO 27001:2022 standards and is GDPR compliant, and commercial terms on long-running contracts, including currency handling, are addressed directly in the statement of work rather than left implicit. Teams scale from 1 to 50+ pre-vetted engineers within 2-4 weeks, and the company is a selected Anthropic partner, training engineers to use Claude Code as part of standard delivery work.
If a multi-year engineering contract is on the table and the currency terms have not yet been discussed, that conversation belongs in the contract draft, not the first invoice cycle. Get in touch with 724SOFTWARE at https://724software.com.vn to discuss how a dedicated team or ODC engagement can be structured against currency movement from day one.
