Advanced discounts Pro

Advanced discounts is a Pro module that extends the free discounts module. It does not replace it: the same pricing pipeline, the same combination modes, the same scheduling and the same explain output.

The cap is lifted

The free edition applies one campaign at a time. With this module enabled you can publish as many as your store needs.

The additional shapes

• Tiered quantity pricing — 10+ at 5% off, 50+ at 15% off, 100+ at a fixed unit price. The highest tier a line reaches wins, and tiers may change kind as well as value.
• Cart-spend discount — a percentage or fixed amount once the basket passes a threshold, applied as a basket-level adjustment rather than by repricing lines. That distinction matters: repricing lines would make each price depend on the others, and removing one item would move every other price on the page.
• Buy X for Y — "any 3 for £10". Units beyond a whole multiple stay at the normal price, so seven items at "3 for £10" is £10 + £10 + one full-price unit, not an average smeared across the line.
• Buy X get Y — a free or discounted gift with stable basket identity, so a shopper who removes it does not get it back on the next page load, and checkout never resurrects one that has gone out of stock.
• Volume bundles — a fixed total for a whole bundle quantity.

The invariants still hold

A discount can never produce a negative line total. Zero is allowed only where a free gift is meant to be zero. A malformed rule leaves the price alone rather than guessing — StoreMaster will not undercharge on your behalf.

Explaining a price

Diagnostics → Explain price shows every stage of a calculation for a chosen product, customer, quantity and date: the base price, the role price, each campaign considered, which one applied, and the reason each of the others did not.