Price (Excluding GST)
$
%
Formula
Calculation Results
Price Including GST
$110.00
Original Amount
$100.00
GST Amount
$10.00
Final Amount
$110.00
Visual Breakdown
Base Amount
90.91%
GST Portion
9.09%
Our free GST Calculator helps you calculate Goods and Services Tax in seconds. Whether you need to add GST to a base price, remove GST from an inclusive amount, or find the exact GST component — this tool does it all. Trusted by business owners, accountants, freelancers, and students across the globe, our VAT/GST calculator is built for accuracy, speed, and simplicity.
| Amount (Ex GST) | GST Amount | Amount (Inc GST) | Quick Copy |
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Enter amounts and click "Calculate All" to see results
GST (Goods and Services Tax) is a value-added tax levied on most goods and services sold for domestic consumption. It's paid by consumers but collected and remitted by businesses.
In most countries, businesses must register for GST if their annual turnover exceeds a certain threshold. Check your local tax authority for specific requirements.
Registered businesses must issue tax invoices showing the GST amount separately. Keep these for record-keeping and to claim input tax credits.
Businesses can claim credits for GST paid on business purchases, reducing the net GST they need to remit to the government.
GST returns are typically filed monthly, quarterly, or annually depending on your country and business size. Set reminders to avoid penalties.
Exempt supplies have no GST and no input credits. Zero-rated supplies (0% GST) allow businesses to claim input credits. Know the difference!
A GST calculator is a free online tool that instantly calculates the Goods and Services Tax on any amount — whether you’re adding GST to a base price, removing it from a GST-inclusive figure, or isolating the exact tax component. Instead of doing manual calculations and risking costly errors, a reliable VAT/GST calculator handles everything in one click.
Businesses, accountants, freelancers, and everyday consumers across Australia, India, New Zealand, Canada, and the UK rely on this type of tool daily. Whether you’re preparing a tax invoice, checking a supplier quote, or planning a purchase abroad, knowing how to calculate GST accurately is a fundamental financial skill.
Our tool goes beyond a basic calculator — it supports three calculation modes (Add GST, Remove GST, Find GST), bulk processing, a multi-currency reference table, and country-specific rates for 16+ regions. Everything you need to handle GST confidently is right here, with zero fees and no registration required.
If you regularly work with financial figures, you may also find our Percentage Calculator and Investment Calculator useful for broader financial planning.
Using our GST calculator takes less than 10 seconds. Here’s exactly how each mode works:
The GST calculator Australia users need must reflect the country’s flat 10% GST rate, introduced under A New Tax System (Goods and Services Tax) Act 1999. Australia’s GST is one of the most straightforward in the world — a single rate applied uniformly to most goods, services, and other items sold or consumed in Australia.
Standard GST rate: 10%
Registration threshold: $75,000 annual turnover ($150,000 for non-profits)
Filing: Quarterly for most; monthly for large businesses (>$20M)
Administered by: Australian Taxation Office (ATO)
Basic food items (fresh fruit, vegetables, meat, bread), most medical and health services, educational courses, childcare, exports, and some financial services are GST-free. Note that prepared food, restaurant meals, and confectionery are fully taxable at 10%.
A tradie invoices a client $500 + GST. Using Add GST mode at 10%:
$500 × 1.10 = $550 total
GST component = $50, collected and remitted to the ATO. Use our Loan Calculator to estimate repayments alongside GST obligations.
India’s GST framework, introduced on 1 July 2017, replaced a complex web of central and state taxes including VAT, service tax, central excise duty, and octroi. The GST calculator India must support all five official rate slabs: 0%, 5%, 12%, 18%, and 28% — plus the additional cess applied to luxury and sin goods.
India operates a dual GST model. When selling within a state, tax splits into CGST (Central GST) and SGST (State GST) at equal halves. For interstate transactions, IGST (Integrated GST) applies at the full rate. Our calculator handles the total rate — your accountant or GST portal splits it accordingly.
Businesses with aggregate annual turnover exceeding ₹20 lakh (₹10 lakh for special category states) must register for GST. E-commerce operators and inter-state suppliers must register regardless of turnover.
ITC lets businesses set off GST paid on purchases against GST collected on sales. Accurate calculation is essential to maximise ITC claims without errors. Example (18%): ₹1,00,000 invoice → GST = ₹18,000 → Total = ₹1,18,000 (₹9,000 CGST + ₹9,000 SGST intra-state). Use our EMI Calculator for GST-inclusive purchase planning.
New Zealand applies one of the highest flat GST rates in the Asia-Pacific region. The GST calculator NZ users require reflects a uniform 15% rate on almost all goods and services, with very few exemptions — making it simpler to apply than many other countries’ systems.
Standard GST rate: 15% (increased from 12.5% in October 2010)
Administered by: Inland Revenue (IR)
Registration threshold: NZD $60,000 annual taxable supplies
Filing: Monthly, two-monthly, or six-monthly depending on turnover
Unlike Australia, New Zealand’s exempt list is very short — only residential rent and financial services are exempt. Exports are zero-rated (0% GST, but suppliers can still claim input credits). Nearly all domestic goods and services — including food — attract the full 15%.
GST = Inclusive Price × (15/115) or ÷ 1.15. Our Remove GST mode does this instantly.
Example: $230 purchase → $230 ÷ 1.15 = $200 base + $30 GST. NZ property investors can also use our Mortgage Calculator for complete financial clarity.
While Australians and New Zealanders call it GST, Europeans, the British, and many other nations call it VAT (Value Added Tax). Despite the different names, both are consumption taxes collected at each stage of the supply chain — and our VAT/GST calculator supports both systems seamlessly.
The core mechanics are identical — both use an input credit system where businesses offset tax paid on purchases against tax charged on sales. The key differences lie in the rates, exemptions, and administrative thresholds set by each country’s tax authority.
Even experienced business owners make GST errors that trigger audits, penalties, and interest charges. Understanding the most common mistakes helps you stay compliant and confident when you calculate GST for real transactions.
In countries with tiered systems like India (0%–28%) or the UK (0%, 5%, 20%), applying the wrong slab to a product is a frequent error. Always verify your specific item’s classification with your country’s tax authority before invoicing. Use our country dropdown to set the correct rate instantly.
Quoting prices without clearly stating whether GST is included leads to disputes. Business-to-business (B2B) quotes are typically exclusive; consumer-facing prices must display the GST-inclusive total in most jurisdictions. Use our Add GST / Remove GST modes to convert instantly.
Failing to claim valid input tax credits on business purchases means you’re effectively overpaying tax. Always keep your tax invoices and ensure your supplier is GST-registered before claiming credits.
GST returns have strict filing deadlines. Late lodgement attracts penalties and interest in every country. Set calendar reminders aligned with your filing frequency — monthly, quarterly, or annually — to stay compliant.
Many small business owners delay GST registration after crossing the threshold, exposing themselves to back-payment liability. If your revenue is approaching the registration threshold in your country, register proactively.
Use this GST calculator to verify every calculation before issuing invoices or filing returns. Accurate numbers are your first line of defence against compliance issues and unnecessary penalties.
Cross-border transactions add a layer of complexity to GST compliance that catches many businesses off guard. Whether you’re importing goods or exporting services, understanding how GST applies internationally helps you price correctly and recover taxes you’re entitled to.
For freelancers and sole traders, GST compliance is often an afterthought until tax time — and that’s when mistakes become costly. Whether you’re a graphic designer in Sydney, a consultant in Mumbai, or a web developer in Auckland, this GST calculator helps you manage your tax obligations professionally.
Registration is mandatory once your annual income crosses the threshold in your country (AUS: $75,000 / NZ: $60,000 / IND: ₹20 lakh). But even below the threshold, voluntary registration lets you claim back GST on business expenses like software subscriptions, equipment, and professional services.
Your invoices must be “tax invoices” and clearly show: your GST registration number, the GST amount separately, the GST-inclusive and GST-exclusive amounts, invoice date, and a unique invoice number. Use our tool to quickly calculate GST on each line item before issuing invoices.
Don’t treat GST collected as revenue. Move it to a separate account immediately — you’re holding it on behalf of the government. It must be remitted at the next filing date regardless of whether your client has paid you yet. Pair this with our Investment Calculator to model returns on money set aside after GST obligations are met.
A GST calculator is a digital tool that applies the Goods and Services Tax formula to any entered amount. You input a price and select a GST rate, and the tool instantly returns the GST amount, base price, and final price — with no manual calculations required.
Prices should clearly state if they include GST. Look for “inc. GST”, “GST inclusive”, or “all taxes included”. Business-to-business prices are often quoted excluding GST, while consumer prices typically include GST.
Yes. Our GST calculator is completely free with no sign-up required. It works on all devices including mobile phones and tablets.
Absolutely. Our VAT/GST calculator supports rates for Australia, Canada, UK, Germany, France, Spain, Italy, UAE, Singapore, Japan, and New Zealand. Select your country from the dropdown and the correct rate is applied automatically.
India has five GST slabs: 0%, 5%, 12%, 18%, and 28%. Our GST calculator for India includes all five slabs with a quick-select option.
Use the Bulk GST Calculator section on this page. Enter each amount on a separate line in the text field, select whether amounts include or exclude GST, and click “Calculate All.” The tool processes every line simultaneously and displays the base amount, GST amount, and final price for each entry. You can export the full results table as a CSV file for use in Excel, Google Sheets, or your accounting software.
Filing frequency depends on your country and business size. It can be monthly, quarterly, or annually. For example, in Australia, most businesses file quarterly, while larger businesses may file monthly.
Yes, GST is typically charged on imported goods at the border. The rate is usually the same as for domestic goods. Some countries have low-value thresholds below which GST may not apply.
GST and VAT are functionally the same — both are consumption taxes collected at each stage of production. Countries like India, Australia, and Canada use the term GST, while European nations and the UK use VAT. Our VAT/GST calculator supports both systems.
Use the “Remove GST” mode in our GST calculator. Enter the GST-inclusive amount, select the applicable rate, and the tool will calculate the original pre-GST price automatically using the formula: Base Price = Inclusive Price ÷ (1 + GST Rate/100).
Registration requirements vary by country and revenue. For example, in Australia, you must register if your annual turnover is $75,000+ ($150,000+ for non-profits). Check your country’s tax authority website for specific thresholds.
Yes, if you’re registered for GST, you can typically claim input tax credits for GST paid on business-related purchases. This reduces the net GST you owe. Keep all tax invoices as proof.
Our GST calculator uses the same standard formulas recommended by tax authorities worldwide. Results are verified to be 100% accurate for all supported rates.
Common GST-free items include basic food items, some medical and health services, educational courses, exports, and certain financial services. The specific list varies by country.
Charging the wrong rate can lead to penalties and interest. If you discover an error, correct it immediately and notify affected customers. You may need to issue adjusted tax invoices and file an amendment with tax authorities.