Add a percentage to a hosting or cloud cost: 10% GST for a GST-inclusive price, an exchange-rate buffer on a US-dollar bill, or a renewal price rise plus added servers.
This calculator adds to a price rather than taking a fee off it. It computes: increase = amount × percentage + price per added server × number added, then new total = amount + increase + other new charges.
Renewal (default, illustrative): you pay $9,600 a year ex GST for hosting. At renewal the provider raises prices by 8%, you add one more server at $1,440 a year, and you add $600 a year of extra backup storage. Increase = $9,600 × 8% + $1,440 = $768 + $1,440 = $2,208. New total = $9,600 + $2,208 + $600 = $12,408, or 29.3% more than today, although the price rise itself is only 8%.
GST-inclusive price: enter the ex-GST amount, 10 as the percentage and zero elsewhere. $9,600 becomes $10,560. A GST-registered business normally claims the $960 back as an input tax credit, but still pays it up front, so it matters for cash flow.
FX buffer on a US-dollar bill: convert the USD amount at today's rate, add any card or bank fee, then enter the AUD figure and a buffer such as 5%. For example, USD $500 a month ÷ 0.65 = $769.23; × 12 = $9,230.77; with a 5% buffer the budget is $9,692.31.
Limits: percentages compound when you apply them one after another (an 8% rise and a 5% rise in the AUD cost of a US dollar is 1.08 × 1.05 − 1 = 13.4%, not 13%). Run the calculator twice for stacked changes. Figures are illustrative and exclude GST unless you add it. See USD pricing and FX and renewal price shocks.
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