Shopify unit price missing on PDP.

Several price-adjacent controls can look like “the per-unit line is missing.” They do not share a settings panel. This page is only when a unit price / price per unit (per oz, per ml, per 100g, per piece) never appears on a PDP that should show one (unit price metafields, theme price blocks, EU/UK labeling apps). Compare-at / strikethrough / sale badge is shopify-compare-at-price-not-showing. Quantity break / volume discount / Buy X Get Y tier tables are shopify-quantity-breaks-not-showing. Selling plan / subscription / try-before pickers are shopify-selling-plan-not-showing. Product description tabs / accordions are shopify-product-tabs-not-showing. Product metafields blank in general (not unit pricing) are product-metafields-not-showing. Markets currency / wrong country price is shopify-markets-currency-wrong.

Open one product that should show a unit price on the live storefront (not only Theme editor preview). Capture four proofs before you edit themes or install another labeling app:

1. Admin → Products → the product / variant: unit price / measurement fields (base measure, reference unit, unit price metafields your theme or EU/UK app expects). If base measure or reference unit is blank, native Liquid and most themes cannot invent a per-oz / per-ml line.
2. Theme Customize → Current theme → product template this SKU uses: Product information / Price block — Show unit price (or Show price per unit) as your theme labels it. Confirm Current, not a draft theme.
3. View-source or DevTools: does .price__unit, .unit-price, [data-unit-price], or similar exist in the DOM but with display:none / opacity:0 / color matching background? That is CSS, not empty metafields.
4. Theme settings → App embeds: any EU/UK unit pricing / labeling / “price per 100g” app on Current? Two unit-price apps, or a labeling app plus a custom Liquid unit line, often blank each other.

If you only tested compare-at strikethrough, a quantity-break table, a selling-plan picker, or description tabs, you are on the wrong playbook. If Markets / country switcher shows a different currency with no unit line, prove domestic first, then chase shopify-markets-currency-wrong only when the domestic PDP already shows unit price correctly.

Native and theme unit price lines need a product or variant measurement: base measure (how much is in the package) and a reference unit (per oz, per 100ml, per piece). Bulk CSV imports that leave those metafields blank, EU/UK labeling apps that write to a different namespace than the theme reads, Markets catalogs that publish a market price without measurement data, or a “unit price” that only lives in a product description paragraph — all produce a clean Price with no per-unit line, even when packaging and ads show “$0.12 / oz.”

Fix path: Products → open each SKU that should show unit price → fill the unit / measurement fields your theme or labeling app documents (or the metafield definition it binds to) → Save. For Markets, confirm the market catalog still exposes the same metafields. Retest the live PDP. Generic metafields not rendering anywhere are product-metafields-not-showing. Compare-at / strikethrough with no unit-price goal is shopify-compare-at-price-not-showing.

Dawn / OS 2.0 themes and many paid themes expose a Price block setting: Show unit price / Show price per unit. That can be toggled off on the live product template, enabled only on a draft theme, present on the default product.json but missing on an alternate template this SKU uses, or stripped so collection cards never had a unit line while you only looked at PDP settings.

Fix path: Customize Current theme → open the product template this SKU uses → Product information → Price (or equivalent) → enable Show unit price → Save. Publish Current. Retest the live PDP URL — not only the editor. Theme editor publish / save failures are theme-editor-publish-failing. Variant picker that updates image/ATC but not price is variant-picker-not-updating — chase that only when unit fields exist for the selected variant but the price block does not refresh.

Custom CSS, page builders, and “clean price” snippets often hide unit lines with rules like .price__unit { display: none}, .unit-price { visibility: hidden }, or color matching the background. EU/UK unit-pricing / labeling / “price per 100g” apps inject their own line while suppressing the theme’s native unit price — or two apps fight until neither renders. An App embed that only loads on draft, or a consent manager that holds marketing embeds, can also leave the unit line blank while Liquid is present in the DOM.

Fix path: DevTools → Inspect the price node. If unit-price markup exists, remove or override the CSS that hides it (theme Custom CSS, app CSS, or page-builder layer). Theme settings → App embeds: keep one unit-price path — either native theme Show unit price OR one labeling app, not both. Disable the duplicate. Retest live PDP. Generic App embeds failing across many apps is app-embed-not-loading. Trust / payment badges missing on cart (not unit price) are shopify-trust-badges-not-showing.

Compare-at / strikethrough / sale badge missing is shopify-compare-at-price-not-showing. Quantity breaks / volume discount / Buy X Get Y tiers missing is shopify-quantity-breaks-not-showing. Selling plan / subscription picker missing is shopify-selling-plan-not-showing. Product description tabs / accordion missing is shopify-product-tabs-not-showing. Product metafields blank in general is product-metafields-not-showing. Markets currency wrong is shopify-markets-currency-wrong.

The only honest test for this page: unit price / price per unit is missing on a PDP that should show one — fixable with filled unit / measurement metafields, theme Price block Show unit price on Current, CSS that does not hide unit-price classes, and one non-fighting labeling path — not compare-at alone, not quantity breaks alone, not selling plans alone, not product tabs alone. Capture metafields + theme blocks + CSS + apps, fix the path. Anything else is a different product.

Stay DIY if unit / measurement fields are filled, theme Show unit price is on Current, CSS is not hiding unit-price classes, and one labeling path is live — and the per-unit line now shows on a live PDP. That is ordinary Shopify admin + theme work.

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