GST Calculator
Calculate Goods and Services Tax for any country — add GST to a net price or remove GST from an inclusive price. Supports Australia (10%), Canada (5%), New Zealand (15%), India GST slabs (5% to 28%), and Singapore. Includes India's CGST/SGST split and a comparison table across all Indian GST slabs.
Please provide any two values from the following inputs to calculate the remaining values.
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How It Works
Multiply the pre-GST price by (1 + GST rate/100). The result is the total price the consumer pays including GST. Used for pricing consumer products and calculating invoices.
Inclusive = Net × (1 + GST%/100)AUD $500 + 10% GST = AUD $550Divide the GST-inclusive price by (1 + GST rate/100). This extracts the pre-GST net price. Essential for business expense reporting and GST input tax credits.
Net = Inclusive / (1 + GST%/100)AUD $550 ÷ 1.10 = AUD $500 netFor intra-state Indian transactions, the total GST splits equally between CGST (central government) and SGST (state government). An 18% slab means 9% goes to each.
CGST = SGST = Total GST / 2₹10,000 at 18%: ₹900 CGST + ₹900 SGST = ₹1,800 total GSTIndia's four main GST slabs (5%, 12%, 18%, 28%) apply to different product categories. The calculator compares the GST amount and total price at each slab for the same net price.
Each slab: Total = Net × (1 + Slab%/100)₹1,000: 5% = ₹50, 12% = ₹120, 18% = ₹180, 28% = ₹280Canadian HST combines the 5% federal GST with provincial sales tax into a single rate. Ontario has 13% HST, BC 12% HST. Provinces without HST (Alberta, Manitoba, Quebec) apply GST and PST separately.
HST amount = Net × HST rate / 100$1,000 in Ontario: $130 HST (13%)Zero-rated supplies have 0% GST but businesses can still claim input GST credits on related expenses. Exempt supplies are outside GST entirely — no tax is charged but input credits cannot be claimed. The distinction matters for business tax recovery.
Zero-rated: charge 0% GST but claim inputs. Exempt: no charge, no creditAustralian fresh food: zero-rated (0% GST, input credits allowed)Quick Reference
Common examples — verify instantly above.
AUD $1,000 + 10% GST
Total price
AUD $1,100
AUD $1,100 − 10% GST
Net price
AUD $1,000
NZD $500 + 15%
GST-inclusive price
NZD $575
₹10,000 at 18% GST
CGST/SGST split
₹900 CGST + ₹900 SGST
Canada $500 + 5% GST
Federal GST amount
$25 GST
Ontario $500 + 13% HST
HST amount
$65 HST
India 28% luxury
₹50,000 car part
₹14,000 GST
Singapore $1,000 + 9%
GST amount
$90 SGD GST
Tips & Shortcuts
For Australian small businesses, the GST-free threshold is AUD 75,000 annual turnover. Below this, you can choose not to register, simplifying administration but losing the ability to claim input GST credits.
When removing GST from an Australian receipt for expense reporting, always use the division method (divide by 1.10 for 10% GST), not subtracting 10% from the total — the latter gives the wrong answer.
In Canada, always confirm which provinces your customers are in before charging HST. Rates vary from 5% (Alberta, federal only) to 15% (Atlantic provinces), significantly affecting pricing and competitiveness.
Indian businesses exporting goods pay 0% GST (zero-rated) but can claim refunds on all input GST paid. This makes exports more competitive as the tax burden does not flow into export prices.
Singapore increased GST from 8% to 9% in January 2024. Update your pricing models when operating across Singapore to reflect the current rate.
For businesses with mixed taxable and exempt supplies, GST input tax recovery is proportional (partial exemption). Keep clear records of which expenses relate to taxable vs exempt activities.
Common Mistakes to Avoid
Using 10% of the gross price to find the GST included in an Australian invoice
To find GST in a $110 inclusive price, divide by 11 (or divide by 1.1 and subtract): $110/11 = $10 GST. Do not calculate 10% of $110 = $11, which is wrong.
Confusing India's CGST/SGST (intra-state) with IGST (inter-state)
For goods sold within the same state, split the GST equally into CGST + SGST. For goods sold across state borders, charge the full rate as IGST. Incorrect classification creates compliance issues.
Treating GST-exempt and zero-rated supplies the same way
Both have 0% tax on sales, but zero-rated businesses can claim back input GST while exempt businesses cannot. For export-heavy businesses, zero-rating significantly reduces costs.
Charging Canadian HST at a uniform rate to all provinces
HST rates differ by province, and some provinces still have separate GST + PST. Charging the wrong rate creates liability for the seller. Always verify the customer's billing province.
Not updating GST rates when governments change them
GST rates change — Singapore raised to 9% in 2024, India regularly adjusts specific product slabs. Hard-coded rate systems without update mechanisms create persistent errors.
Forgetting that GST input credit requires a valid tax invoice
To claim Australian or Indian GST input credits, you must hold a valid tax invoice. Expenses paid with receipts not showing supplier GST registration details cannot be claimed.
Frequently Asked Questions
GST (Goods and Services Tax) and VAT are both multi-stage consumption taxes with the same basic mechanics — tax collected at each stage with businesses reclaiming input tax. The name differs by country: Australia, Canada, New Zealand, and India use GST; Europe uses VAT. India's GST is notable for its complex multi-rate slab system.
Australia applies a flat 10% GST on most goods and services. Exempt supplies include basic food (fresh fruit, vegetables, meat), certain medical and educational services, and residential rent. Businesses with over AUD 75,000 annual turnover must register for GST.
Canada has a federal GST of 5%, but most provinces also impose a provincial tax. In Ontario and BC, the federal GST and provincial sales tax are combined into HST (Harmonized Sales Tax) at 13% and 12% respectively. Alberta has no provincial sales tax, so only the 5% federal GST applies.
India's GST uses four main slabs: 5% (essential items like some foods, life-saving drugs), 12% (processed foods, medicines), 18% (most goods and services, software, restaurants), and 28% (luxury goods, cars, tobacco, aerated drinks). Exported goods are zero-rated.
For intra-state transactions in India, GST is split equally between Central GST (CGST) and State GST (SGST). An 18% GST = 9% CGST + 9% SGST. For inter-state transactions, Integrated GST (IGST) applies at the full rate, paid to the central government which then distributes to states.
New Zealand applies a flat 15% GST on nearly all goods and services. Unlike Australia, New Zealand's GST is very broad-based with few exemptions — even most financial services are included. Businesses with NZD 60,000 annual taxable supplies must register.
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