How to calculate GST savings your organisation can reinvest in hiring (Australia and Canada)

GST savings are a cash-flow estimate, not a special tax credit for hiring. Your organisation first calculates the GST or HST it can lawfully recover on eligible business purchases, offsets that amount against tax collected (using the return method for its jurisdiction), and then decides whether the resulting cash position can support new employees. Wages themselves do not generate GST credits in the Australian and Canadian guidance covered here.

The calculation depends on where your organisation is registered. Australia’s example uses a 10% GST rate and a tax-inclusive formula of total price divided by 11. Canada uses GST/HST, with rates and provincial rules that vary. Confirm the country, registration status, reporting period and local restrictions before putting any number in a hiring plan.

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What “GST savings” actually means

A GST-registered organisation normally collects GST on taxable sales and pays GST on many business purchases. It reports both amounts for a defined period. Eligible input credits reduce the amount remitted, or can contribute to a refund when credits exceed the relevant tax collected and adjustments.

That reduction is not a hiring subsidy. It is the recovery of tax that the organisation paid or owes on qualifying inputs used in its commercial activity. Calling the resulting cash “available to reinvest” is a budgeting decision: after the return is filed or the liability is reduced, management can allocate some of the cash to recruitment if the wider budget supports it.

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• Tax calculation: determine eligible GST/HST paid or payable, apply business-use allocations and restrictions, and offset credits against tax collected under the local return rules.
• Hiring calculation: compare the resulting post-return cash position with the full cost and timing of employment.
• Not included: gross GST on every invoice, GST-free or otherwise ineligible purchases, and wages treated as recoverable GST.

Start with the organisation’s jurisdiction

Do not use a rate, return line or threshold until you identify the organisation’s country and registration regime. The two examples below are not interchangeable.

If the organisation operates in another country, use that country’s GST or VAT legislation and return instructions rather than importing either example.

The calculation in one view

Use the organisation’s own reporting period and accounting records. The following framework works conceptually in both jurisdictions, while the exact return mechanics differ.

1. Set the period. Use the GST/HST reporting period that contains the purchase, tax payment or tax liability under the applicable rules.
2. List candidate purchases. Export invoices, expense reports, import records and other documents that show tax paid or payable.
3. Remove ineligible items. Exclude private or non-commercial costs, purchases with no GST/HST charged, unsupported claims, and items restricted or specially treated by local law.
4. Allocate mixed use. For an asset or service used partly for business and partly privately, apply the allowable business or commercial-use percentage.
5. Calculate each credit. Use the invoice’s stated tax where available. For an Australian GST-inclusive amount under the 10% example, divide the total by 11.
6. Total eligible credits. Add only the amounts that satisfy registration, evidence, timing and use requirements.
7. Complete the return calculation. Offset credits against GST/HST collected on taxable sales and include required adjustments, using the jurisdiction’s return method.
8. Model hiring separately. Compare the net payable or refund and the organisation’s resulting cash balance with wages, payroll taxes, benefits, equipment, recruiting and other employment costs.

The output is a net GST/HST position, not a separately labelled pool of money. A refund may arrive later than the period in which the expense occurred, and a reduced remittance may simply leave more cash in the operating account.

Australia: calculating GST credits under the 10% example

Who can claim

The ATO says a registered business may claim a GST credit for a business purchase that includes GST when the relevant conditions are met. Its guidance requires the purchase to be connected with business use, GST to have been included, and the organisation to have paid or be liable to pay the price. Keep the current ATO requirements with the transaction file: What are GST credits?

Extracting GST from a GST-inclusive price

For a GST-inclusive Australian purchase under the 10% example, the embedded GST is:

GST component = GST-inclusive total price ÷ 11

For an invoice totaling $352 including GST:

$352 ÷ 11 = $32 GST

The $32 is the mathematical GST component. It is not automatically a $32 credit. The purchase must still be for an eligible business purpose, the supplier must have charged GST, the evidence must support the claim, and no restriction may apply. The ATO’s purchase-calculation explanation is at Calculating GST on purchases.

Australian evidence and exclusions

In the ATO guidance described here, a tax invoice is required for purchases above $82.50. Confirm the threshold and current documentation rules when preparing a return, because the applicable requirements can change.

Do not include an item merely because it appears in the accounts-payable ledger. The ATO guidance identifies circumstances in which a credit cannot be claimed, including:

• the purchase is unrelated to the business;
• the purchase is GST-free or input-taxed where a credit is unavailable;
• the seller is not registered for GST and therefore did not charge it;
• required evidence, such as an invoice above the stated threshold, is missing;
• the claim is outside the applicable four-year limit; or
• another specific restriction or adjustment applies.

Retain the invoice, proof of payment or liability, business-use calculation and any adjustment note together. If an invoice is corrected or a purchase is returned, update the credit rather than carrying the original amount forward.

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Australian wage question

The ATO guidance expressly states that a GST credit cannot be claimed for wages paid to staff. Payroll is therefore an employment expense in the hiring budget, not an input GST credit in the return.

Canada: calculating GST/HST input tax credits

Eligibility framework

The CRA describes an input tax credit as recovery of GST/HST paid or payable on purchases and expenses related to commercial activities. The organisation generally must be registered during the relevant reporting period, the tax must have been paid or become payable, and records must support the claim. See CRA: Input tax credits.

Canada does not have one nationwide GST/HST number that can be inserted into every organisation’s formula. The applicable GST or HST rate depends on the place-of-supply and provincial treatment. Use the tax shown on the invoice or the prescribed calculation for the transaction; do not apply Australia’s divide-by-11 method to a Canadian invoice.

Commercial-use allocation

When a purchase serves both commercial and non-commercial purposes, claim only the permitted commercial-use share. The CRA’s percentage guidance explains allocation and notes that special rules apply to some entities and expenses: ITC eligibility percentage.

For example, if documented commercial use is 70% and the invoice shows $1,000 of GST/HST, the preliminary ITC is $700 before applying any special restriction or adjustment. The 70% must be supportable; it is not a discretionary percentage chosen to increase a refund.

Canadian wage question

The CRA states that salaries, wages, commissions, gratuities and other cash remuneration paid to employees are not subject to GST/HST. They therefore do not create an ITC. Payroll may be deductible under other tax rules, but that is separate from recovering GST/HST on an input tax credit claim. The CRA’s benefits explanation is at About the GST/HST on benefits.

Worked Australian example: from invoices to hiring cash

Step 1: classify the period’s purchases

Assume an Australian GST-registered organisation has these GST-inclusive purchases in one reporting period:

The table separates arithmetic from eligibility. If the vehicle’s allowable business use is 60%, its preliminary credit is $100 × 60% = $60. The equipment contributes $32 if all conditions are met. The private and unregistered-supplier items are not added merely because dividing their totals by 11 produces a number.

Step 2: offset credits against the return position

Suppose the organisation’s return shows $8,000 GST collected on taxable sales and $92 of eligible input credits after allocation and exclusions. The net amount before any other required adjustment is:

$8,000 − $92 = $7,908 payable

If eligible credits and other adjustments instead exceeded GST collected, the return could produce a refund or credit balance under the applicable rules. The result is not necessarily a cash payment on the filing date; timing depends on the return and processing arrangements.

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Step 3: decide what can be reinvested

The organisation should not describe the $92 as money generated by hiring. It is the reduction in the GST remittance attributable to qualifying purchases in this period. Management can model the lower remittance as additional operating cash, then test whether that cash is recurring, one-off or delayed before committing to an employee.

Worked Canadian example: allocating an ITC

Assume a Canadian registrant has an invoice showing $1,000 of GST/HST on a technology purchase. Records demonstrate 70% commercial use, and no special rule reduces the claim. The preliminary ITC is:

$1,000 × 70% = $700

If the return’s GST/HST collected and other adjustments produce a net remittance after the $700 ITC, that remittance is the tax result to use in cash planning. The organisation must use the applicable provincial rate, place-of-supply treatment, reporting method and documentation rules rather than infer them from this illustration.

Build a hiring budget from the net tax position

Once the GST/HST return estimate is complete, create a separate employment-cost model. Include:

• gross wages or salary for the period being planned;
• employer payroll taxes and statutory contributions;
• benefits, leave and insurance;
• recruiting fees, advertising and onboarding time;
• equipment, software, workspace and training; and
• the cash runway required before the employee contributes revenue or capacity.

Compare that total with the organisation’s post-return cash balance, not with gross GST on all purchases. A one-time invoice may create a one-time credit, while a new hire creates a continuing obligation. A conservative plan labels the tax benefit as recurring, seasonal or non-recurring and models the return-filing delay.

How to compare two periods or business units

Comparisons are meaningful only when the periods use the same jurisdiction, registration status, reporting method and accounting basis. Use a worksheet with these fields:

Do not compare a high-credit quarter with a low-credit quarter without explaining changes in capital purchases, sales volume, private use or claim timing. A larger credit may simply reflect a larger eligible purchase, not improved operating efficiency.

Recordkeeping checklist

Before finalising the estimate, check each transaction:

• Is the organisation registered for GST or GST/HST for the period?
• Does the invoice or import record show tax actually charged or payable?
• Was the item acquired for commercial or business activity?
• What percentage is allowable when use is mixed?
• Does a local restriction apply to this category of expense?
• Is the required tax invoice or other evidence retained?
• Is the claim within the jurisdiction’s time limit?
• Has a credit note, return, rebate or change in use altered the amount?
• Has the amount been included only once in the return?

Keep a transaction-level schedule that records the invoice date, supplier, tax amount, business-use percentage, eligible credit, reason for any exclusion and reporting period. This makes later corrections auditable and prevents unsupported estimates from entering the hiring plan.

Common calculation errors and fixes

Treating every invoice total as recoverable

Error: adding gross purchase totals or every apparent tax component to a “savings” figure. Fix: calculate only the tax actually charged, then apply eligibility, use allocation and restrictions.

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Claiming GST on wages

Error: multiplying payroll by the GST rate. Fix: keep wages in the employment-cost model; the Australian and Canadian guidance cited here does not treat employee cash remuneration as a GST credit or ITC.

Using the Australian formula in Canada

Error: dividing a Canadian invoice by 11. Fix: use the tax shown and the applicable Canadian rate and place-of-supply rules.

Ignoring mixed use

Error: claiming 100% of tax on an asset partly used privately. Fix: document the commercial or business-use percentage and apply the local allocation method.

Confusing a refund with recurring income

Error: hiring permanently on the assumption that a one-time refund repeats. Fix: identify whether the credit comes from a non-recurring purchase and model future periods separately.

Filing without evidence

Error: relying on a bank transaction when the jurisdiction requires an invoice or other specific record. Fix: obtain and retain the required documentation before claiming, especially for amounts above the Australian $82.50 threshold described by the ATO.

Decision rule: when is reinvestment prudent?

Consider hiring only when all three conditions hold:

1. The GST/HST amount is supported by the jurisdiction’s eligibility rules and records.
2. The expected cash timing is clear: reduced remittance, refund or credit balance, including any processing delay.
3. The organisation can fund total employment cost through weaker sales or a lower-than-expected tax benefit.

If any condition fails, keep the amount as a tax estimate rather than an approved hiring budget. A finance lead can present a base case using only confirmed credits, a downside case excluding disputed items, and an upside case for credits that are probable but not yet finalised.

Official guidance to verify before filing

Rules and administrative requirements can change. Verify the current instructions for the organisation’s period and entity type:

• Australian Taxation Office, What are GST credits?
• Australian Taxation Office, Calculating GST on purchases
• Canada Revenue Agency, Input tax credits
• Canada Revenue Agency, About the GST/HST on benefits
• Canada Revenue Agency, ITC eligibility percentage

Bottom line for a hiring plan

Calculate eligible GST or GST/HST credits from documented business purchases, apply the correct business-use allocation and local restrictions, and offset the result against tax collected using the organisation’s return method. Then treat the resulting net cash position as one input to a separate employment-cost and runway analysis. There is no GST credit for hiring itself, and wages are not a recoverable GST/HST purchase in the Australian and Canadian rules described above.

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