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GST Calculator — 免費線上計算機 | HomeCalcPro
GST Calculator精準試算，提供行業標準公式與即時測算結果。
Parameters & Assumptions
Currency
Live Analysis & Metrics
InstantPrimary Metric
$0.00
Calculated instantly from your parameters
Secondary 1—
Secondary 2—
Benchmark Assessment:
Enter your parameters to view market evaluation.
GST Inclusive & Exclusive Formulas
Transparent mathematical methodology explained in plain English.
GST Inclusive = Exclusive × (1 + GST Rate) | GST Amount = GST Inclusive / (1 + 1/GST Rate)Calculates total retail cost including GST or backs out the exact tax portion for business tax credit claims (BAS return).
Variables Explained:
- Amount ($): Price before or after GST tax.
- GST Jurisdiction: Australia (10%), New Zealand (15%), Canada Federal (5%), Singapore (9%).
Real Project Example
Adding 10% Australian GST to a $1,500.00 Wholesale Equipment Invoice
Determining GST tax liability and gross payable balance.
Sample Project Inputs:
Exclusive Amount:$1,500.00
GST Rate:10%
Step-by-Step Calculation:
- Calculate 10% GST: $1,500.00 × 0.10 = $150.00.
- Calculate Total GST Inclusive: $1,500.00 + $150.00 = $1,650.00.
Calculated Answer:$1,650.00 Total ($1,500.00 Base + $150.00 GST).
Knowledge Base
常見問題解答 (FAQ): GST Calculator
Click any question below to expand quick answers, formulas, and expert tips.
When is a business required to register for GST in Australia?
Australian businesses must register for GST when their gross annual turnover reaches or exceeds $75,000 ($150,000 for non-profit organizations).
Can businesses claim back GST paid on purchases?
Yes, registered businesses claim back GST paid on business inputs via Input Tax Credits (ITCs) on their regular Business Activity Statement (BAS).