Worked costings and choosing a provider
USD-priced security services: exchange-rate buffers, card fees and GST for Australian buyers
How to budget a security platform or MDR service billed in US dollars, how GST works on imported digital services and local resellers, and how to set an FX buffer.
When a security service is billed in US dollars, your Australian-dollar cost moves with the exchange rate, card or bank fees add a few per cent, and the GST treatment depends on who supplies it. A practical budget converts at today's rate, adds the payment fee, then adds an FX buffer (for example 5%) for currency movement. On GST: an Australian reseller charges 10% GST on its invoice; an overseas supplier selling to a GST-registered business that gives its ABN generally does not charge Australian GST. In the illustrative example below, a USD $2,000 a month service costs about $38,000 a year in AUD with card fees, and a 5% buffer takes the budget to about $39,900.
This guide supports the selection method. Use the uplift, GST and FX calculator with method "add" for each step. Exchange rates and fees here are illustrative, not forecasts. This is general information, not tax advice.
Step by step: from a USD price to an AUD budget
Illustrative assumptions: the service costs USD $2,000 a month; the exchange rate is 0.65 (one AUD buys 0.65 USD); your card charges a 3% international transaction fee.
| Step | Calculation | AUD |
|---|---|---|
| Convert one month | USD $2,000 ÷ 0.65 | $3,076.92 |
| Add 3% card fee | $3,076.92 × 3% | $92.31 |
| Monthly cost | $3,076.92 + $92.31 | $3,169.23 |
| Annual cost | $3,169.23 × 12 | $38,030.77 |
| Add a 5% FX buffer | $38,030.77 × 1.05 | $39,932.31 |
In the calculator: amount = 38,030.77, percentage = 5, other fields 0, and the new total is $39,932.31.
What a currency move does: if the rate falls from 0.65 to 0.60, the same USD $2,000 costs $3,333.33 a month before fees, 8.3% more than at 0.65. A 5% buffer would not cover that move. Decide how much movement you can absorb, and review the budget when the rate shifts.
Combining a USD uplift with an exchange-rate move
At renewal, a US provider may raise its USD price at the same time as the AUD weakens. The effects multiply: a 7% USD uplift and an AUD that buys 5% fewer US dollars increase the AUD cost by about 1.07 × 1.05 − 1 = 12.35%. Use the renewal uplift guide to model the full renewal.
GST: who charges it and can you claim it?
| Situation | GST on the invoice | Can a GST-registered business claim it? |
|---|---|---|
| Australian provider or reseller supplies the service | 10% GST, shown on a tax invoice | Generally yes, as an input tax credit, if acquired for your business |
| Overseas supplier, you give your ABN and state you are GST-registered | Supplier generally does not charge Australian GST | Nothing to claim; a reverse charge may apply only if you would not be entitled to a full credit |
| Overseas supplier charges GST anyway (e.g. you did not give your ABN) | 10% added | Limited-registration overseas suppliers do not issue tax invoices; without one you generally cannot claim the credit, so ask the supplier to correct it |
| Overseas supplier sells to an unregistered business | 10% GST may be charged as a sale to a consumer | Not claimable |
Since 1 July 2017, GST applies to digital services imported by Australian consumers, and overseas suppliers can treat a buyer as a business (not a consumer) if the buyer provides an ABN and states it is registered for GST. If you see GST on an overseas invoice and you are registered, update your account details with the supplier.
For budgeting, keep two numbers: cost (ex GST, because you claim the GST back) and cash flow (including GST, because you pay it before you claim it). For a local quote of $3,300 a month ex GST, the annual cost is $39,600 and the annual cash outlay including GST is $43,560.
Local reseller or direct USD billing?
| Factor | Local reseller in AUD | Direct USD billing |
|---|---|---|
| Currency risk | Usually fixed for the term, or passed on at renewal | You carry it every month |
| GST | 10% on a tax invoice, claimable if registered | Generally none if you give your ABN |
| Support | Local, in your time zone, often bundled with management | Vendor support, may be offshore |
| Contract | Australian law, small business unfair terms protections apply to standard-form contracts | Often foreign law; enforcing rights may be harder |
| Price | May include a margin | May be lower on paper, before fees and buffer |
In the illustrative example, the local quote ($39,600 ex GST) is within a few hundred dollars of the buffered USD budget ($39,932.31) and removes currency risk. That is the comparison to make: buffered direct cost against the local price, plus the value of local support and contract terms.
Frequently asked questions
What exchange rate should I budget with?
Use today's rate for the base and add a buffer you are comfortable with. Do not budget at the best rate you have seen recently.
Can I pay annually in advance to lock in the rate?
Paying a year upfront fixes the AUD cost for that year, but you lose flexibility if you need to exit. Check the refund terms and ask your accountant about prepayment deductions.
Is a foreign-currency card or account worth it?
It can cut the transaction fee. Compare its fees and exchange-rate margin with your current card.
Do Australian unfair contract terms rules apply to an overseas provider?
They can apply to contracts with Australian small businesses, but enforcement against an overseas company is harder. A local reseller contract may be easier to rely on.
Sources
- Australian Taxation Office — GST on imported services and digital products, input tax credits
- Federal Register of Legislation — A New Tax System (Goods and Services Tax) Act 1999, Division 84
- Reserve Bank of Australia — historical exchange rates
- Australian Competition and Consumer Commission — unfair contract terms for small business
