Seller and business calculators: guides

216 guides in this section. Pick the question closest to yours, or browse by tool. Page 4 of 9

• How do I make sure a discount does not make me sell at a loss?Get the sale price from the discount calculator, then check it against cost in the margin calculator. Cost 90, price 120: 30% off loses 6, 20% off keeps 6.
• Why does the discounted price in my store's cart differ from the calculator by one cent?The cent comes from rounding: the calculator rounds once, while a cart may round each unit, each line or after tax. A worked example shows where it comes from.
• My supplier's price list says trade discount 30/10/5; what is my net cost?A 30/10/5 trade discount on a supplier price list is an equivalent 40.15%, not 45%. On a list price of 1000 your net cost is 598.5. How to compare suppliers.
• My supplier gives 2% off if I pay the invoice within 10 days; how much do I actually save?A 2% early payment discount on a 12,500 invoice saves 250 and you pay 12,250. How to work it out, weigh it against your cash, and offer it if you are the seller.
• Does it matter whether I apply a percentage discount before or after VAT?A percentage discount gives the same total before or after VAT, since both steps multiply. When that changes, and why tax follows the discounted price.
• Does the discount calculator send my prices anywhere, and does it work offline?The discount calculator works inside your browser, so your prices and planned sale rates never reach a server. Once the page has loaded, it keeps working offline.
• A client asked for 10% off my quote; how do I work out the new total and show it?A 4,500 quote at 10% off becomes 4,050. How to work it out, how to show it on the quotation, and what happens when the client then asks for another 5%.
• If a price goes up 20% before a sale and then gets 20% off, is it back to the old price?A 20% rise followed by 20% off does not return to the original price: 100 becomes 120, then 96. Why, which discount really undoes a rise, and why shoppers notice.
• I want 5% off for 10 units and 10% off for 50; how do I build the price table?How to build a quantity-break price table: the unit price at each tier, the order total, and the gap that makes 50 units cheaper than 49. With worked figures.
• One store sells at 400 with 30% off, another at 360 with 25% off; which is cheaper?A bigger percentage is not a lower price. 400 at 30% off is 280, and 360 at 25% off is 270. How to compare two stores' offers in under a minute.
• How do I set the compare-at price and the sale price on Shopify for a 30% sale?On Shopify your normal price goes in Compare-at price and the discounted price in Price. How to work it out for 30% off, and what rounding the price does.
• I want to clear old stock in stages with an extra markdown each week; how do I plan the prices?A four-week clearance plan on a 200 item: 20, 15, 10 and 10 percent take it to 110.16, an equivalent 44.92% off. And when to stop before you sell below cost.
• How do I price a three-product bundle at 15% off?Add up the three prices, then apply the discount to the total. A bundle of 89, 59 and 37 at 15% off costs 157.25 and saves 27.75. Why discounting each item agrees.
• Is 10% cashback exactly the same as 10% off?In money, yes: 10% of 500 is 50 either way. But cashback comes after you pay, and as store credit it is worth less. The arithmetic, worked through.
• Should I give 10% or 15% off for National Day, and what does the difference cost on 200 orders?On an average order of 150, 10% off costs 3,000 across 200 orders and 15% off costs 4,500. And how many extra orders the higher rate needs to earn the same profit.
• Is an extra 20% off items already reduced by 25% better than waiting for a 40% sale?25% off then an extra 20% is exactly 40% off: a 300 item costs 180 either way. How to compare any stacked offer, and when waiting is worth it.
• I sell a monthly subscription and want to offer a yearly plan with two months free; what discount and price is that?Two free months out of twelve is 16.67% off. A 100 monthly plan becomes 1,000 a year instead of 1,200. And how to enter the rate precisely enough.
• Which coupon saves more: 20% off the whole cart or 30% off one item in it?A smaller rate on a bigger base usually wins. In a 500 cart with a 200 item, the cart coupon saves 100 and the item coupon 60. And when that flips.
• I want the customer to pay a round 99 including VAT; what is my price before tax?Start from a round tax-inclusive shelf price like 99 and work back to the net price for your store, at the rate you enter, then check the profit still works.
• The VAT on my invoice differs from the calculator by one cent; which one is right?Why invoice VAT can differ by a cent from a calculator: rounding each line versus rounding the total once, shown with a worked example.
• A client asks whether my quote includes VAT; how do I work out the total to put on it?For freelancers who charge VAT: work out fee, tax and total at the rate you enter, and show all three on your quote so the client never has to guess.
• My marketplace deducts its commission with VAT on top; how do I split the fee and the tax from my statement?Your marketplace deducts its commission plus VAT. Split that statement line into net fee and tax, using the rate printed on the platform's own fee invoice.
• My invoice has lines at different VAT rates and some at zero; how do I calculate it with the calculator?The calculator applies one rate to one amount, so handle a mixed invoice by grouping lines per rate, running each group, then adding the results. Worked example.
• My store prices include VAT; how do I work out my real profit margin?If your prices include VAT, extract the tax first and measure margin on the net price, or you will count the tax as profit. Worked example with real figures.