4 Metrics eCommerce Brands Should Track Before Growth Gets Expensive

Table of Contents

• Introduction
• Unit economics by SKU
• SKU count vs. order velocity
• Fulfilment cost as a percentage of revenue, by channel
• Omnichannel order accuracy
• The bigger point
• FAQs

Introduction

Growth is exciting. More orders, more channels, more SKUs. But growth also has a habit of hiding problems until they become expensive.
Having run fulfilment for over 100 eCommerce brands, there are four numbers we’d want visibility on from day one – because each of them gets much harder to fix once your volumes climb.

1. Unit economics by SKU

Revenue alone doesn’t tell you whether a product is actually profitable. For each SKU, look at the full picture:

Revenue − COGS − Fulfilment − Packaging − Returns

Not blended across the catalogue. Not averaged. Per SKU.
A product can look healthy at topline level while quietly losing margin once fulfilment and return costs are included. The earlier you see that, the easier it is to fix.

2. SKU count vs. order velocity

Adding products can look like growth. But every SKU takes up space, creates inventory complexity, and adds another item that needs to be managed accurately.
The key question is simple: is each SKU moving fast enough to justify the space and complexity it creates?
Slow-moving products can increase storage and handling costs without contributing much revenue. More choice is not always more growth.

3. Fulfilment cost as a percentage of revenue, by channel

Shopify, Amazon, TikTok Shop, and wholesale can all behave very differently. Each channel may have different:

• fulfilment costs
• return rates
• packaging requirements
• shipping costs
• margin profiles

If everything is blended together, it becomes difficult to see which channels are actually profitable. One underperforming channel can easily eat into the margin created elsewhere.

4. Omnichannel order accuracy

Every new sales channel creates another integration point. And every integration point creates another place where something can go wrong.
Once you start selling across multiple channels, track order accuracy closely. That means looking at the gap between:

• what was ordered
• what was shipped
• what the customer actually received

Small inaccuracies can quickly turn into returns, complaints, chargebacks, and operational debt. (For context, our own order accuracy runs at 99.8% – the kind of number that only holds up when the systems behind it are tight.)

The bigger point

The brands that scale smoothly are usually not the ones with the fewest problems. They’re the ones that spot problems early.
Margin issues, SKU bloat, channel profitability, and order accuracy all become harder to fix once volumes increase. The earlier you track them, the more options you have.
Because growth without margin isn’t really growth. Build the visibility first. Then build the volume.
This is exactly where the right fulfilment partner earns its keep. Our client portal gives you real-time visibility into stock, orders, returns, and per-channel performance – so these four numbers are there when you need them, not buried in a spreadsheet you update once a quarter.
Want that visibility built in from day one? Request a free quote and we’ll show you how it works for your brand.

Frequently asked questions

You chill, we fulfil.

Last updated: September 2026