8 Essential Reports for Online Retailers to Review

A busy sales day can look like good news until the marketplace fees, delivery costs, returns and advertising charges arrive. For an e-commerce business, turnover alone rarely tells the full story. The most useful essential reports for online retailers show what is genuinely profitable, what is tying up cash and where action is needed before a small issue becomes expensive.

For UK online retailers, good reporting is not about producing more spreadsheets. It is about having a small set of reliable figures that support better buying, pricing, tax and growth decisions. The reports below provide that visibility.

1. Profit and loss report

A profit and loss report, often called a P&L, shows income, direct costs and overheads over a chosen period. It answers the question every retailer needs to ask regularly: are we making a profit from the business as it currently operates?

For an online store, sales revenue should be viewed alongside the cost of goods sold, marketplace commissions, payment processing fees, postage, packaging, returns, software subscriptions, wages and marketing spend. If those costs are not correctly recorded, an apparently healthy sales figure can hide a thin margin or a loss.

Review this report monthly at a minimum. Faster-growing businesses may benefit from a weekly high-level view, especially during peak trading periods. Compare the current month with the previous month and the same period last year where possible. The value is in understanding movement, not simply reading a final profit figure.

2. Sales by channel report

Many retailers sell through a mix of their own website, Amazon, eBay, Etsy, TikTok Shop, wholesale accounts and social media. A sales by channel report separates those income streams so you can see where revenue is coming from and how each channel is performing.

The highest-selling platform is not automatically the best channel. One marketplace may generate significant revenue but take a larger share through commission, fulfilment costs, promotional charges and returns. Your own website may produce fewer sales while delivering a stronger margin and better customer relationship.

Track sales volume, refunds, discounts and net revenue by channel. This helps you decide where to invest advertising budget, whether a platform is worth expanding and whether sales concentration is creating unnecessary risk. If one marketplace produces most of your revenue, a policy change or account suspension could have a serious impact on cash flow.

3. Gross profit by product report

A product-level gross profit report is one of the most valuable reports for an e-commerce business with a broad catalogue. It identifies which products produce worthwhile returns after their direct costs are taken into account.

The calculation needs care. Product cost should include more than the supplier invoice where relevant. Consider import duties, freight, customs charges, product-specific packaging, fulfilment costs and marketplace fees. For goods bought in foreign currency, exchange-rate movements can also affect the true cost.

This report often challenges assumptions. A bestseller may have a low margin, while a slower-selling line may make a greater contribution to profit. It does not always mean you should stop selling the lower-margin product. It may attract new customers or increase basket value. But you should know its role before increasing stock orders or advertising spend.

4. Inventory valuation and stock ageing report

Stock is cash sitting on a shelf, in a warehouse or with a fulfilment provider. An inventory valuation report shows the financial value of stock held, while a stock ageing report highlights how long particular lines have remained unsold.

Both reports are particularly useful when cash feels tight despite strong turnover. Overstocking can leave money tied up in products that are not moving, and obsolete stock may need to be written down. Understocking creates a different problem: missed sales, reduced marketplace rankings and frustrated repeat customers.

Set sensible ageing categories for your trading pattern, such as stock held for under 90 days, 90 to 180 days and over 180 days. Seasonal businesses will need a different approach from retailers selling evergreen products. A Christmas gift line held in January deserves a different response from a year-round household product that has failed to sell for six months.

Regular stock reports also support accurate year-end accounts and Corporation Tax calculations. Poor stock records can distort reported profit because the cost of unsold inventory should not be treated in the same way as stock already sold.

5. Cash flow forecast

Profit and cash are connected, but they are not the same. A retailer can be profitable on paper and still struggle to pay suppliers, VAT or payroll on time. A cash flow forecast shows expected money in and out over the coming weeks or months.

For online retailers, the timing differences can be significant. Payment providers and marketplaces may hold back funds, suppliers may require deposits before goods are shipped, and VAT can become due before customers have paid in full. Large stock purchases can also create a temporary cash squeeze long before those products generate sales.

A practical forecast should include expected payout dates, supplier payment dates, payroll, rent, loan repayments, tax liabilities, advertising commitments and upcoming inventory orders. Update it when circumstances change rather than treating it as a fixed document.

The forecast will not predict every outcome perfectly. Its purpose is to give you enough warning to negotiate supplier terms, delay a non-essential purchase, arrange funding or adjust your stock plan before cash becomes a crisis.

6. VAT report

VAT can become complicated quickly for online sellers, particularly where sales take place through multiple platforms or involve customers outside the UK. A VAT report brings together output VAT on sales, input VAT on eligible business purchases and the resulting VAT liability or reclaim position.

The right treatment depends on your VAT registration status, where goods are located, where they are sold and whether an online marketplace is deemed to be the supplier for VAT purposes. Selling into the EU, holding stock overseas or importing goods introduces further considerations.

Your report should reconcile with the figures submitted through Making Tax Digital-compatible software. Do not rely solely on a marketplace dashboard, as it may show gross sales, deductions and taxes in a format that does not match your accounting records.

Review VAT well before the filing deadline. This gives you time to investigate unusual transactions, correct coding errors and plan for the payment. For many growing retailers, a surprise VAT bill is less a tax problem than a reporting and cash-planning problem.

7. Returns and refund report

Returns are a normal cost of retail, but an elevated return rate can point to a commercial issue worth fixing. A returns and refund report should show the number and value of refunds, return reasons, affected products and return rates by sales channel.

Some categories naturally generate more returns, such as clothing and beauty products. Even so, patterns matter. Repeated comments about sizing, damaged packaging, inaccurate product descriptions or delayed delivery may be reducing profit and damaging customer trust.

Look beyond the refund amount. Each returned item may also carry outbound delivery, return postage, repackaging, restocking and disposal costs. In some cases, improving product imagery, supplier quality checks or packaging can produce a better financial return than simply increasing advertising spend.

8. Marketing return report

Paid advertising can scale sales, but it can also consume margin very quickly. A marketing return report compares campaign spend with sales, contribution and, where data allows, customer acquisition outcomes.

Advertising platforms tend to focus on metrics such as clicks, conversions and return on ad spend. These are useful, but they do not replace profitability analysis. A campaign with a high return on ad spend may still be unprofitable once product cost, delivery, discounts, VAT and returns are included.

Review marketing performance by product, channel and campaign. Where repeat purchases are common, it can be reasonable to accept a lower first-order return because the customer may be profitable over time. For one-off or low-margin products, the threshold should be tighter.

Make reporting part of your trading routine

The quality of these reports depends on the records behind them. Marketplace payouts need to be reconciled correctly, stock movements must be recorded consistently, and business costs should not be left uncategorised for months. Automation can reduce administration, but it still needs informed review.

Start with the reports that address your immediate decisions. If stock is absorbing cash, prioritise inventory ageing and cash flow. If turnover is rising but profit is not, focus on gross profit by product, sales channels and marketing return. The right reporting rhythm should reflect the pace and complexity of your business.

A clear monthly management pack can turn financial information into a practical decision-making tool rather than a year-end exercise. With the right support, your figures can help you choose what to buy, what to promote and where to protect profit with greater confidence.