Scarcity sells. **Stock-based Pricing** raises a product's price step by step as its stock runs down, so the last few units of something popular sell for more than the first few – automatically, everywhere it's sold. ## How the ladder works You set one or more **steps**: a stock threshold and a percentage the price rises by once a variant's remaining stock falls to or below it. | When stock is at or below | Price rises by | |---|---| | 20 | 10% | | 5 | 25% | A variant with 30 in stock sells at its normal price. Once it drops to 20, it jumps 10%. Once it drops to 5, it jumps 25% (not 10% + 25% – only the tightest step that applies counts). Each lower threshold has to raise the price *further* than the one above it, so the ladder always climbs as stock shrinks. ## Turn it on Stock-based Pricing is included on the **Pro plan** at no extra cost. On a lower plan, opening the settings page prompts you to upgrade instead. Open **Settings → Modules → Stock-based Pricing**. There's one rule per store. ## Choose which products it applies to - **All products** – every product in your catalog. - **Selected products** – pick specific products by hand. - **Selected collections** – every product in the collections you pick. Only **manual collections** can be targeted this way – if you try to switch a targeted collection to a dynamic one (variant-values, newest, or dynamic-price), YNS blocks it until you remove the collection from the rule first. Pick at least one target, or the ladder applies to nothing. ## Build your price steps Add a step for each threshold: **when stock is at or below** a number, **price rises by** a percentage. Thresholds can't repeat, and a lower threshold must charge more than the one above it – the form flags it if a step breaks the order. ## Preview before you save The **Preview** table shows exactly what the saved rule would charge right now: variant, current stock, base price, price now, and the next step (with how many more units can sell before it kicks in). It only reflects what you've already saved – changes you haven't saved yet aren't included. A variant that doesn't get a price change shows why: stock isn't tracked for it, its price is set automatically, it's a bundle or set, or it's sold only by subscription. ## What's never stepped - **Bundles and sets** – priced from their components, so stepping one would double-count. - **Subscription-only products** – every line is charged at the plan price, which the ladder never touches. - **Variants with an automatically set price** (for example, gold-priced jewelry that repriced daily) – that price is already the answer for the moment. - **Untracked stock** – there's no stock number to measure against. ## Where the ladder applies Once a product is targeted and its stock hits a step, the raised price is what shoppers see everywhere: product pages, collections, the cart, and checkout. It replaces the base price before volume-pricing tiers, promotions, and coupons are applied, in every currency you sell in. The price is locked in the moment a shopper starts paying, so a step crossed between them starting checkout and the payment completing can't change what they're charged – the order is written at the price that was live when payment started. Stores using the [storefront API](/docs/api-reference/products) get two extra fields on a targeted product's variants: `nextStockPrice` (what it'll cost once the next step hits) and `unitsLeftAtCurrentPrice` (how many units remain before it does) – handy for an "only 7 left at this price" message on a custom storefront. The ladder's price changes are also recorded in your daily EU Omnibus price history, the same as any other price change – see [Meet EU compliance requirements](/help/account/compliance). ## FAQ ### Does the price go back down if stock goes back up? Yes – restocking a variant above a threshold takes it off that step, back to its base price or the step it now qualifies for. ### Can I use it alongside volume pricing? Yes. Stock-based Pricing changes the base unit price first; [volume pricing](/help/products/volume-pricing) tiers then apply on top of that. ### Why isn't a product I picked showing a raised price? Check the Preview table's reason column – it's usually a bundle, a set, sold only by subscription, priced automatically, or its stock isn't tracked. Untracked or automatically-priced variants are never stepped, whatever the rule says. ### Can I target a smart collection? No – only manual collections can be targeted, since the rule needs a fixed list of member products. Add the products to a manual collection instead, or target them directly. ### Does it cost extra? No separate charge – it's included on the **Pro plan**. See [Manage your plan & billing](/help/account/plan-and-billing). ## What's next - Track the stock levels the ladder reacts to in [Manage inventory](/help/products/manage-inventory). - Stack it with quantity-based discounts in [Offer bulk discounts with volume pricing](/help/products/volume-pricing). - See how price changes are logged for compliance in [Meet EU compliance requirements](/help/account/compliance).