Why Revenue Numbers Differ Between Synplex and Shopify
Synplex revenue and Shopify revenue will rarely match exactly. This is normal and expected — the two systems calculate revenue differently by design.
The two calculation methods
Synplex calculates revenue as: price × quantity sold. That is it. Taxes, shipping, discounts, refunds, and transaction fees are all excluded.
Shopify calculates revenue as the final amount customers actually paid — base price plus tax plus shipping, minus discounts and refunds.
| Factor | Synplex | Shopify |
|---|---|---|
| Base price × quantity | ✅ Included | ✅ Included |
| Sales tax | ❌ Excluded | ✅ Included |
| Shipping costs | ❌ Excluded | ✅ Included |
| Discounts and coupons | ❌ Excluded | ✅ Included |
| Returns and refunds | ❌ Not adjusted | ✅ Adjusted |
| Gift cards | ❌ No | ✅ Yes |
Why Synplex uses price × quantity
Synplex revenue is not an accounting metric — it is an inventory planning signal. The question it answers is: how much demand did this product generate?
Taxes and shipping vary by customer location and fulfilment method. Discounts vary by promotion. Including any of these would make it harder to compare product performance consistently or spot demand trends accurately. Stripping them out gives a clean, comparable signal across every product in your catalogue.
For financial accounting — total revenue, profitability, tax reporting, cash flow — use Shopify. For understanding which products are selling, how fast, and whether demand is growing or declining, use Synplex.
A concrete example
You sell 100 Blue T-Shirts at $20 each in January.
Shopify shows $2,284:
- Base sales: 100 × $20 = $2,000
- Sales tax (8%): +$160
- Average shipping: +$200
- Discounts applied: −$100
- Two returns: −$76
- Net: $2,284
Synplex shows $2,000:
- 100 units × $20 = $2,000
Both figures are correct. They are answering different questions.
Which number to use when
| Goal | Use |
|---|---|
| Comparing product performance across your catalogue | Synplex |
| Identifying demand trends for a product | Synplex |
| Making inventory and reorder decisions | Synplex |
| Financial accounting and reporting | Shopify |
| Tax reporting | Shopify |
| Total company revenue | Shopify |
| Profitability analysis | Shopify minus COGS |
FAQ
Is the Synplex revenue figure wrong? No — it is correct for its purpose. It intentionally excludes taxes, shipping, and adjustments to give a clean demand signal for inventory planning.
Why does Shopify always show more? Usually because Shopify includes tax and shipping in its figure, which are almost always positive additions. Discounts and refunds can partially offset this.
Will the difference always be the same percentage? No — it varies month to month depending on tax rates by location, average shipping costs, discount usage, and return rates.
Can I verify the calculation? Yes. Take any order in Shopify, multiply the product price by the quantity ordered, and you will get the Synplex contribution from that order. Add tax, shipping, subtract discounts and refunds, and you get the Shopify figure.
Related
- Metric Troubleshooting — if other metrics also seem off
- Data Metrics Reference — full metric definitions and calculation logic