Target-Margin Selling Price Calculator with Thai VAT

Find a unit selling price from cost, target margin and selling fees, then add 7% VAT if the shop is VAT-registered, so the margin you planned is what you actually keep rather than a simple markup on cost.

For an m% margin and f% fees on the pre-VAT price, pre-VAT price = cost ÷ (1 − f − m). Profit per unit = pre-VAT price − fees − cost. If VAT-registered, selling price = pre-VAT price × 1.07, with 7% VAT applying until 30 September 2027 under the cabinet extension. Adding a percentage to cost gives a lower margin on the selling price than intended.

Example: a THB 100 cost with a 30% target margin and no fees needs a pre-VAT price of 100 ÷ 0.70 = THB 142.86, or THB 152.86 with VAT. A 30% markup on cost gives only THB 130, a 23.08% margin. With 5% fees the pre-VAT price is 100 ÷ 0.65 = THB 153.85.

Assumes a unit price with fees as a percentage of the pre-VAT price. If a platform charges fees on the VAT-inclusive price or adds VAT to its fees, check with the marketplace fee calculator. Income tax, shipping and fixed costs are excluded.