Turn Shopify 'cost per item' into POAS

Shopify has a built-in cost per item field — most stores just leave it blank. Fill it in and it becomes the foundation of accurate profit bidding.

6 min read

Live profit view

See POAS vs revenue-only reporting

Profit Bid connects store costs to ad spend so you bid on margin — not vanity ROAS.

POAS before vs after completing cost per item

  • Assumed POAS
  • Real POAS

Once the cost field is filled, reported POAS drops to reality — and bidding can finally optimize true margin.

Track POAS automatically from your store — upload profit conversions and scale winners with A/C/X labels.

The cost per item field

Under each variant's pricing, Shopify offers a 'cost per item' field. It is optional, so many catalogs leave it empty — which makes profit reporting impossible.

Populate it in bulk (CSV or apps) so every variant carries a cost.

From cost field to POAS

Once cost is present, sync orders and cost to compute gross profit per order, then upload profit-weighted conversions to Google Ads.

POAS before vs after completing the field is usually a step-change in accuracy.

Step-by-step

Follow these in order — each step builds on the previous one.

  1. 1

    Fill cost per item

    Add cost to every Shopify variant (bulk import works).

  2. 2

    Sync cost & orders

    Connect the store to compute per-order gross profit.

  3. 3

    Upload profit values

    Send profit conversions to Google Ads for margin bidding.

Frequently asked questions

Common questions about this topic — tap to read answers.

Can I bulk-import cost per item?

Yes — via CSV export/import or inventory apps. Then keep it updated as costs change.

Does Shopify calculate profit for me?

Shopify shows some margin reports, but for ad bidding you need per-order profit uploaded as conversion values — that is what Profit Bid automates.

Pricing

Apply this guide — pick your plan

Select a plan and continue to secure checkout — POAS conversion upload included on every tier.

14-day free trial available — start free · full pricing details