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PriceMux

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Editing base prices and weights

How to change the base price PriceMux works from — using Shopify's own product editor, bulk editor, or Products CSV. No PriceMux import needed.

Updated June 9, 2026

Your base price lives in Shopify, not in PriceMux. PriceMux reads it and sets your online price on top of it. So you change a base price the same way you change any price in Shopify — in the product editor, the bulk editor, or the Products CSV — and PriceMux notices the change and updates the online price for you, usually within a few seconds.

This page covers:

  • Where the base price comes from
  • Editing a base price
  • Editing weights (used by weight rules)
  • An advanced option: a separate starting price
  • What happens after you save

Where the base price comes from

By default, PriceMux uses the regular Price you’ve set on the product in Shopify — the one in the product editor next to “Price.” That’s the number your rules work from, and the number your register charges.

There’s also an optional advanced setting for special cases (see below), but most stores never need it — the regular Shopify price is the base, exactly as you’d expect.

Editing a base price

Nothing PriceMux-specific here — use any of Shopify’s usual tools:

  • One product at a time. Open the product, edit its Price, and Save.
  • Bulk editor. From the Products list, select several products, click Bulk edit, and edit the Price column.
  • Products CSV. Export your products, edit the Variant Price column in your spreadsheet, and re-import.

PriceMux picks up the change and updates the affected online prices on its own, usually within a few seconds.

Editing weights

Weight rules use the weight you’ve set on each product in Shopify — the same weight that drives shipping. You don’t manage weights in PriceMux.

  • One product at a time. Product editor → the Weight field. Pick the unit (g, kg, lb, oz).
  • Bulk editor. Add the Weight column and edit it there.
  • Products CSV. Edit the weight column in your export and re-import.

When a weight changes, PriceMux re-checks any weight rules and updates the online price, the same as a base-price edit.

An advanced option: a separate starting price

Sometimes you want PriceMux to start from a different number than the one your register charges. The most common case: you’ve already included shipping in your Shopify price, and you want the register to charge the original price without shipping.

PriceMux supports this with an optional per-product setting — you give it the “without shipping” price to start from, and the register removes the shipping against that number instead. It’s an advanced option most stores never touch. If you think you need it, get in touch and we’ll set it up with you.

What happens after you save

  1. PriceMux notices your change in Shopify (usually within a few seconds).
  2. It works out the new online price for each affected product from your rules.
  3. It writes the new online price back to Shopify. For a bulk change you’ll see this as the Apply step in PriceMux; for a single edit it just happens in the background.
  4. It records the change in your Audit log, so you can see which rule ran and what changed. If a rule would have dropped a price below the minimum you set, that’s noted there too.

Common questions

Q: Can I edit base prices in bulk through PriceMux?

No — PriceMux doesn’t have its own base-price importer, because Shopify already has one (the Products CSV). A second importer would just create another place to manage the same number. Keep base prices in Shopify, and use PriceMux’s rules import/export for the rules themselves.

Q: I changed the Shopify price but the online price didn’t update.

It usually takes a few seconds, and longer when Shopify is busy. If it’s been more than a minute, open the in-app Audit log — every update attempt is logged, including failures. No row yet means the change hasn’t come through from Shopify; a row marked failed will tell you what went wrong.

Q: What if a rule would push the online price below my cost?

Set a minimum price on the rule. PriceMux won’t write anything below it, and it notes the catch in the Audit log so you can take a look.

Q: I don’t want PriceMux to manage a specific product.

If you’ve set a price by hand in Shopify and don’t want PriceMux to overwrite it, open Conflicts in the app, find the product, and click Add product to exclusions. PriceMux will leave that product’s prices alone from then on. You can also keep your manual edit as the new base, or re-apply the rule to go back to the computed price.