Enter what one parcel costs you (the carrier rate, any surcharge, packaging, picking and packing), then choose what your customer pays: the cost, the cost plus a markup, part of it, nothing at all, or a flat charge. You get the delivery charge excluding and including VAT at the rate of the goods you ship, what each parcel earns or costs you, and every step of the working.
Add up the cost of one parcel
Start from what the carrier charges you for this parcel, excluding any VAT you reclaim. Royal Mail postage is often exempt from VAT, so enter it as you pay it. Add any fuel or peak-season surcharge your carrier adds as a percentage of its rate, then packaging (box, padding, label) and the time spent packing, or what your fulfilment partner charges.
Choose what your customer pays
You can pass on the exact cost, add a markup, charge only part of it, offer free delivery or show a flat charge. The first three start from the cost; with free delivery, all of it stays with you. With a flat charge, enter the price your customer will see, including VAT: the calculator works out the amount excluding VAT and shows whether the charge covers your costs.
Use the VAT rate of the goods
When the terms of the sale require you to deliver, HMRC treats the goods and their delivery as a single supply: the delivery charge follows the VAT liability of the goods, even if you show it separately. Delivering standard-rated goods means 20% VAT on the charge; delivering zero-rated goods, such as most food or children’s clothes, means a zero-rated charge. If you are not VAT-registered, choose "No VAT" and enter your costs including VAT.
Optional delivery and separate packing are standard-rated
If delivery is not part of the sale, because the customer could collect and asks you to deliver for an extra charge, the delivery is a separate supply, standard-rated whatever the goods. The same goes for a separate charge for packing. Choose 20% in those cases. The calculator covers deliveries within the UK: sending goods abroad or bringing them in follows other VAT rules (VAT Notice 700/24, section 4).
Round up and check
A .90, .99 or whole-pound ending always rounds up, on the charge including VAT; the VAT is then taken back out of that price with HMRC’s VAT fraction. The profit or loss per parcel shows what delivery earns you, or what you pay towards it yourself. Copy the workings, export them as a CSV file or save them to Priostack.
Cost of one parcel = carrier rate + surcharge + packaging + picking and packing, the surcharge being a percentage of the carrier rate.
Charge excl. VAT = the cost, or cost × (1 + markup), or cost × the share your customer pays, or 0 for free delivery.
VAT = charge excl. VAT × rate of the goods; charge incl. VAT = charge + VAT.
For a flat charge or a rounded price, start from the charge incl. VAT: VAT = charge × rate ÷ (100 + rate), which is 1/6 at 20%, then net = charge − VAT.
Profit or loss per parcel = charge excl. VAT − cost of one parcel.
Every amount is rounded to the nearest penny, halves rounded up.