Money, Tax & Shipping

Tax engines, shipping zones, coupons, and the minor-unit conventions everything monetary is stored in.

Charge tax with a flat rate or address-matched zones, including inclusive pricing and the EU VAT preset.

Charge shipping with a flat rate or zones, using methods, weight bands, class surcharges and free-shipping thresholds.

Create discount codes, scope them to products, limit their use, and know what happens when a code lapses mid-checkout.

How KahunaCart stores and calculates money: BIGINT minor units, brick/money arithmetic, and one currency per order.