VAT / GST / Sales Tax Calculator Community
Questions, answers and tips from people who use the VAT / GST / Sales Tax Calculator. Add or remove VAT, GST or sales tax.
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This page shows only real posts from real people, so it starts empty. The guide below has the questions people most often have about the VAT / GST / Sales Tax Calculator. Pick one to start a thread, or write your own.
From the tool guide: common questions about VAT / GST / Sales Tax Calculator
The items below are not posts by community members. They come from the written guide for this tool and are here to get a conversation started. Use “Ask a follow-up” to open a thread about any of them.
How do I calculate VAT?
Multiply the net price by the rate (for 20%, by 0.20) to get the VAT, then add it to the net price.
From the tool guide Ask a follow-upHow do I remove VAT from a price?
Divide the gross price by 1 + rate (1.20 for 20%). The difference is the VAT.
From the tool guide Ask a follow-upIs VAT the same as GST?
They work the same way. VAT is used in the UK and EU; GST in countries such as India, Australia, New Zealand, Canada and Singapore.
From the tool guide Ask a follow-upWhat is the UK VAT rate?
The standard rate is 20%, with reduced rates of 5% and 0% for some goods.
From the tool guide Ask a follow-upWhat this tool does
VAT (value-added tax), GST (goods and services tax) and sales tax are percentages added to the price of goods and services. To quote a customer you often need to add the tax to a net price; to keep your books you often need to strip the tax out of a gross (tax-inclusive) price. This calculator does both in one step.
How to use it, step by step
- Enter the amount.
- Enter the tax rate or tap a preset.
- Choose “Add tax” or “Remove tax (price includes tax)”.
- Read the net, tax and total.
Tips from the guide
- To remove tax, divide by (1 + rate), do not just subtract the percentage.
- Check whether the price you have already includes tax.
- Round only at the end to avoid pennies of drift.
- Keep a note of which rate applied to each item.
Common mistakes to avoid
- Subtracting 20% from a gross price instead of dividing by 1.20.
- Using the wrong rate for the product category.
- Applying tax twice.
Who uses it
- Freelancers and small businesses. Price invoices and quotes with the right tax.
- Shoppers and travellers. Work out the pre-tax price of an item.
- Bookkeepers and students. Check VAT return figures.
How to ask a question people can answer
A good thread on the VAT / GST / Sales Tax Calculator saves everyone time. Start with a title that names the exact problem, such as the input you used, the result you expected and the result you got. A title like “Not working” is hard to answer, while a title with the specifics gets replies quickly.
- Say what you tried. List the steps you followed and any settings you changed, so replies do not repeat what you already did.
- Share a small example. A short sample input and the output you saw is worth more than a long description. Remove anything private first.
- Mention your setup. Your device, browser and whether you are on a phone or a computer can explain many odd results.
- One question per thread. Separate topics get clearer answers and are easier to find later with the search box above.
- Come back and reply. If a suggestion worked, say so and upvote it, and if you found the fix yourself, post it for the next person.
Community rules
Be kind, stay on topic and keep personal data out of your posts. Do not post adult, hateful or illegal content, advertising or repeated links. Every post is shown with its author’s username and date, and posts that break these rules can be hidden by moderators. This space is for help with the VAT / GST / Sales Tax Calculator and related tasks, and it is separate from the sitewide discussion forum where broader topics live.