Business plan for an online store

The word is scary: you picture forty pages, charts and a skeptical banker. In reality, the business plan of an online store that's just starting fits on a few sheets and serves one person first: you. Its role isn't to predict the future, but to answer three questions before you commit your time and money — how much it costs, how much you earn per sale, how many sales you need to breathe easy. This guide is for you if you're preparing your launch or already selling without ever having put your numbers down: we'll build an honest forecast, starting from your real costs rather than your hopes.

Table of contents

• A business plan for you, not for the bank
• Estimating your costs without fooling yourself
• Calculating your margin product by product
• Forecasting your sales in three scenarios
• The break-even point, your peace-of-mind threshold
• Keeping your plan alive after launch

A business plan for you, not for the bank

If you're seeking financing, your counterpart will impose their format. But for the vast majority of self-funded store launches, the business plan is a personal steering tool. It should fit in four blocks: what you sell and to whom, what it costs, what each sale brings in, and what you need to sell to cover your costs. Nothing more at the start.

Its real value lies in the exercise itself: putting down the numbers forces you to verify what you assumed. It's now — before buying stock or committing to a subscription — that bad surprises are cheapest to fix.

Estimating your costs without fooling yourself

Start by listing everything your store will cost you in the first year, without rounding down. Our guide on the real cost of an online store details the line items; the essential here is to classify them.

Fixed costs and variable costs

Fixed costs fall due whether you sell or not: a possible platform subscription, domain name, tools, insurance, starting stock. Variable costs follow each sale: the product itself, packaging, shipping, the platform and payment commission, advertising brought back to the order.

This distinction isn't accounting, it's strategic: fixed costs determine the risk of your launch, variable costs determine your margin. That's the whole point of a commission-based model like Naaora's — €0 to start, a 0.4%–1% commission when you sell: most of your costs become variable, and you pay almost nothing as long as you earn nothing. Conversely, a monthly subscription is a fixed cost that runs from day one, sales or not.

Calculating your margin product by product

Margin is your store's breathing: it's what remains of a sale once all variable costs are paid. Calculate it product by product, all-inclusive — the product, the packaging, the shipping if you offer it free, the commissions, the advertising share.

A calculation example, not a norm

Here's an entirely fictional example, for the method only — your numbers will differ. A maker sells a tote bag for €25. The product costs her €8, packaging €1, free shipping €5, payment and platform commissions about €1, and she estimates her advertising at €3 per order. Variable costs: €18. Margin: €7 per sale, i.e. 28% of the price. It's this margin — not revenue — that will pay her fixed costs and then pay her.

This calculation, repeated on every product, often reveals surprises: best sellers that bring in almost nothing, discreet products that are very profitable. It also informs your pricing and shipping decisions — the shipping fee strategies in our e-commerce shipping guide are chosen with your margin in hand.

Forecasting your sales in three scenarios

Forecasting the sales of a store that doesn't exist yet is an exercise in humility: you will be wrong. The workaround isn't to aim true, it's to prepare three trajectories. The cautious scenario: a slow start, a few sales per month from your extended circle and your networks. The average scenario: your best honest estimate, looking at what stores comparable to yours seem to achieve. The ambitious scenario: what happens if one lever works better than expected.

For each scenario, cross the number of monthly sales with your unit margin: you get three total-margin curves to compare against your fixed costs. The key question then becomes: is the cautious scenario survivable? If yes, you can launch with peace of mind — everything beyond it will be a bonus.

The break-even point, your peace-of-mind threshold

The break-even point is the most useful number in your entire business plan: the number of monthly sales from which your margin covers your fixed costs. The formula fits on one line: monthly fixed costs divided by average unit margin.

Let's return to the fictional tote bag example — still for the method, not as a benchmark. With €70 of monthly fixed costs and €7 of margin per sale, the break-even point is 10 sales per month. Below, the store costs; above, it earns. This single number turns a vague anxiety ("will it work?") into a concrete goal ("I need 10 sales a month — how do I find them?"). Note in passing the effect of the business model: fewer fixed costs mechanically means a lower break-even point — and a less risky launch.

Keeping your plan alive after launch

A business plan sleeping in a drawer has only served once. Yours should live at the pace of your real numbers: once a month, half an hour, compare forecast and actuals — sales, average margin, costs. Deviations aren't failures, they're information: an underestimated cost gets corrected, a product more profitable than expected deserves a push, an exceeded scenario justifies investing.

Over the months, your forecast becomes a dashboard: your real numbers replace your assumptions, and your decisions — new product, advertising budget, moving to a more suitable legal status — are made on data, no longer on impressions.

Conclusion

An honest online store business plan fits in four numbers you control: your fixed costs, your unit margin, three sales scenarios and your break-even point. The exercise takes an evening, not a month — and it turns a vague bet into an informed decision. Next step: open a spreadsheet, list your costs in two columns, fixed and variable, and calculate your main product's real margin. Everything else follows from there.