How to price a product: the margin math, worked through

You had a cost, you doubled it, and the number looked about right. That is how most first prices get set, and it is also why a lot of stores end up busy and broke at the same time.

The short version: there are three ways to price, and you need all three. Cost-plus tells you the floor you must not go below. Competitor prices tell you the ceiling the market has trained buyers to expect. Value tells you where between those two you belong. Everything else in this post is the arithmetic that makes those three numbers real.

Every figure below is illustrative. Substitute yours as you read.

Markup is not margin, and the gap is where plans die

Markup is measured against your cost. Margin is measured against your price. Mixing them up is the most common arithmetic error in small retail.

Doubling your cost — the instinct everyone has — produces a 50% gross margin. A 50% gross margin does not survive free shipping, a 20% welcome code and a return, which is to say it does not survive a normal month of ecommerce.

Build the fully loaded cost before you price anything

Your supplier's invoice is not your cost. Here is a landed cost for one illustrative candle:

Then there are the costs that only appear once you sell it, and these are the ones that get forgotten: payment processing, outbound shipping if you advertise free delivery, breakage and returns, the marketplace or platform cut, and the discounts you will run. Also your own labor if you make the thing, which belongs in cost rather than in your sense of personal sacrifice.

What each of the three methods is for

Cost-plus is the floor. Add up the loaded cost, apply the margin you need, and you have a price below which volume makes you poorer. Its weakness is that it knows nothing about the buyer; your costs are not interesting to anyone but you.

Competitive pricing tells you the range buyers already accept, and what they think is included at each point. Its weakness is that you cannot see a competitor's costs, volumes, funding or whether they are profitable at all. Matching an unprofitable competitor is not research, it is copying.

Value-based pricing asks what the outcome is worth to the buyer, and it is both the hardest and the most rewarding. It works best when the buyer's alternative has a visible cost — a replacement, a repair, a professional's hourly rate, a product that has to be rebought every month.

The worked example

Loaded cost $9.25. Payment processing 2.9% plus $0.30. Free shipping offered, costing you $6.50 per order. Breakage and returns provisioned at 2% of price. Fixed costs to cover: $600 a month.

Read the last column again. The same candle at $24 requires 89 orders a month to keep the lights on. At $42 it requires 26. The price you choose is really a decision about how much marketing you are signing up to do for the rest of the year.

This is also why free shipping is a pricing decision rather than a marketing one. At $24 the $6.50 you absorb is most of your contribution.

What a discount actually costs you

Take the $34 price and run 20% off. The customer pays $27.20.

A 20% discount removed 40% of your contribution, because the discount comes entirely out of the thin slice and not out of the costs. To make the same money you now need 66% more orders.

A storewide 20% code is not a 20% decision. On normal small-store margins it is a 40% decision, and it is usually made in an afternoon.

If you want to discount, discount something that does not touch the margin on the hero product: a bundle that raises order value, a second-item offer, free shipping above a threshold you calculated.

Why underpricing is the error you cannot take back

You can lower a price any Tuesday you like. Raising one costs you a conversation with every existing customer. That asymmetry alone should push your first price upward, but there are three sharper reasons.

You recruit the wrong customers. A buyer who chose you because you were cheapest leaves when someone is cheaper. They also ask for more support per dollar, return more, and never refer anyone who is not also looking for cheap.

Your margin is your marketing budget. At $6.77 contribution you cannot buy a customer, cannot afford a sample program, cannot absorb a replacement, and cannot fund a second product. At $23.89 you can test an ad, send a free unit to someone with an audience, and refund a complaint without flinching. The high-price business has options the low-price business does not.

Price is read as information. In categories with no spec sheet — candles, skincare, craft, services — buyers use price to infer quality, because they have nothing else. Being the cheapest option can lower conversion rather than raise it.

The fair counter-argument: in genuinely commodity categories, where the item is identical and buyers compare on a listing page, you cannot price above the market and pretending otherwise just means no sales. If that describes you, the real answer is that price is the wrong place to compete and you need a bundle, a service, a subscription or a different product. No arithmetic fixes an undifferentiated commodity.

How to raise a price without losing the base

Raise $34 to $39 and contribution per order goes from $16.28 to $21.04, a 29% improvement. Divide the old contribution by the new one: you only need 77% of your previous unit volume to make exactly the same money. You can lose almost a quarter of your orders and be no worse off, and in practice you rarely lose that many.

Then do it properly. Announce it with a date rather than letting people discover it. Give existing customers a window at the old price. Change something visible at the same time, even if it is only the packaging or a care card, because a price rise with nothing attached reads as a grab. Try the new price on new traffic before you apply it to everyone, and raise prices on new products first, where nobody has an anchor.

What the arithmetic cannot tell you

None of this reveals willingness to pay. There is no spreadsheet cell for it, and no software, mAutomate included, can calculate what a stranger will hand over for something they have not seen before. The only instrument that measures it is charging a price and watching.

So treat your first price as a hypothesis with a review date. Pick a date ninety days out, write it in a calendar, and at that point look at three things: conversion rate, how often you discounted, and how many people mentioned price in a message. Those three together tell you which direction to move.

A practical first pass

1. Work out landed cost, including freight, packaging and your own labor.
2. Pick a candidate price and compute contribution after payment fees, shipping, returns and platform cuts.
3. Write down three competitor prices and exactly what each includes.
4. Choose the highest price you can defend in one sentence.
5. Write that sentence down. If you cannot, the price is wrong or the product is.
6. Total your fixed costs and calculate the units needed at that price.
7. Decide your discount floor now, in calm conditions, before the first slow week.
8. Set the ninety-day review date.

If you are still choosing what to sell, what to sell online covers the filters, and if the product is handmade the pricing conversation has its own trap, covered in sell handmade products online. Subscription pricing works differently again because churn enters the math — see how to start a subscription box. When a price is set, the next job is the first ten orders: first customers.