Money and tax: free tools, no sign-up

Do the sums before they surprise you: tax, margin, loans and discounts, with the working shown.

The numbers behind a price are simple once you see them laid out. These calculators show their working, so you understand the answer, not just copy it.

Made for: Traders setting prices and checking margins, Businesses that charge or reclaim VAT or sales tax, Anyone comparing a loan or a hire purchase offer, Shoppers who want to know what a discount is really worth.

  • VAT, GST and sales tax calculator: Add tax to a price, or take it out. Any rate, any currency, with the working shown.
  • Profit and markup calculator: Price for profit. See markup, margin and profit side by side.
  • Loan repayment calculator: See the monthly repayment, the real interest and the full schedule before you sign.
  • Discount calculator: Price after the discount, stacked discounts done right, and what % off a sale really is.
  • Break-even calculator: How many you need to sell each month to cover your costs, and to hit a profit target.
  • Add or remove tax in one tap: Work out VAT, GST or sales tax at any rate, either adding it to a price or pulling it out of a total that already includes it.
  • Know your margin and break-even: See the difference between markup and margin, set a selling price that actually makes a profit and find how many sales you need to cover your costs.
  • See what a loan really costs: Estimate monthly repayments and the total interest over the life of a loan, so you can compare offers properly.

Five money sums every small business should know

Markup and margin are not the same thing, and mixing them up quietly eats profit. Markup is profit as a share of cost. Margin is profit as a share of selling price. Buy something for 100 and sell it for 150, and your markup is 50 per cent but your margin is about 33 per cent. If you want a 50 per cent margin, you need to sell at 200.

Break-even tells you how many sales you need before you make any money at all. Divide your fixed costs, such as rent and salaries, by the profit you make on each unit after its own costs. If rent and wages come to 300,000 a month and each item leaves you 1,500 after costs, you need 200 sales just to stand still. Everything after that is profit.

Tax inclusive and tax exclusive prices catch people out. To remove tax from a price that already includes it, divide by one plus the rate, rather than simply taking the percentage off. At a 20 per cent rate, a price of 120 contains 100 before tax and 20 of tax, not 24. A calculator that shows the working saves embarrassing mistakes on invoices.

Loans and discounts deserve the same care. Two loans with the same interest rate can cost very different amounts depending on the term and fees, so compare total repayment, not just the monthly figure. And two discounts in a row are not added together: 20 per cent off and then 10 per cent off is 28 per cent off in total, not 30.

Money habits worth building

  • Know your cost price for every product before you set a selling price
  • Decide whether your prices include tax, and say so clearly
  • Work out your monthly fixed costs and your break-even point
  • Compare loans by the total amount you will repay, not only the monthly payment
  • Review your prices when your costs change, not once a year
  • Keep business money and personal money in separate accounts
  • Ask an accountant to check your tax position at least once a year

Questions

Does this work with my currency and tax rate?

Yes. Pick any currency and enter whatever rate applies to you. The tools do not assume a country.

Why does removing 20 per cent tax not give me 20 per cent off?

Because the tax was added to the price before tax, not to the total. To remove it, divide the total by 1.2 at a 20 per cent rate. The calculator shows this working so you can check it.

Is the loan calculator the same as my bank's figure?

It is an estimate using a standard repayment method. Your lender may use different interest methods, fees or insurance, so always ask for their full repayment schedule before you sign.

Is my financial information stored?

No. The sums happen in your browser on your own device. Nothing you type is sent to us.

These calculators give estimates for planning only and are not financial, tax or accounting advice; check your figures and your local tax rules with a qualified adviser before relying on them.