Concepts · 26 August 2026

Price monitoring explained: what it is, and when it's worth doing

Price monitoring is the practice of regularly recording what other stores charge for the same products you sell, so you can see where your prices sit in the market and notice when that changes. It is a measurement discipline, not a pricing strategy: it tells you what the market is doing and leaves the decision about what to charge with you. Most e-commerce stores start doing it in a spreadsheet and move to software when the spreadsheet stops being kept up to date.

What it is, precisely

Three things have to be true for something to count as price monitoring rather than a one-off look around:

1. It is repeated. A single snapshot tells you today's gap. Repetition tells you the direction, and direction is what you act on.
2. It is like-for-like. The same product, the same variant, the same pack size, at the delivered price rather than the sticker price.
3. It is recorded. Without history you cannot tell a two-week promotion from a permanent repositioning, and those call for opposite responses.

Drop any one of the three and you have anecdotes.

What it is not

It is not repricing. Repricing changes your prices automatically according to rules. Monitoring produces information; repricing acts on it. They are frequently sold together and frequently confused, but a store can monitor for years without ever automating a price change — and many should, because automated repricing on a small catalogue tends to produce price wars faster than profit.

It is not dynamic pricing. Dynamic pricing means adjusting your own prices in response to demand, time, stock or competition. Monitoring is one possible input to it.

It is not MAP enforcement. Minimum advertised price enforcement is a brand watching its resellers to catch breaches of an agreement. Same raw observation, entirely different purpose and different legal footing.

It is not price comparison for shoppers. A comparison site is a consumer product. Monitoring is an operational tool for the seller.

What you actually do with it

Four uses, roughly in order of how much money they are worth to a small store:

Catching undercuts on products that matter. Someone drops below you on a top seller. You want to know within a day, not from a customer.

Finding where you are underpriced. The unglamorous one, and usually the more profitable. Prices drift; costs rise; competitors move up and nothing tells you. Every product where the market has moved above you is margin you are declining.

Spotting competitor stock-outs. A competitor out of stock while you have inventory is a window where price sensitivity drops. It is the only signal on this list where the right response might be to raise a price.

Building a picture of how the market behaves. Which competitors discount seasonally, which run permanent "sales", who follows whom. This takes months of history and is what makes the later decisions quick.

The worked example

Monitoring is only worth the effort if it changes a decision, so here is the arithmetic that does the changing.

You sell a product at $40. It costs you $24. Gross margin: $16 a unit, or 40%.

Monitoring tells you a competitor has moved to $36 and stayed there for three weeks.

Match at $36: margin falls to $12 a unit. To make the same gross profit you need 16 ÷ 12 = 1.33× the volume — a 33% increase in units, from a 10% price cut. Ask whether that is plausible for this product.

Hold at $40: you are betting you will not lose a third of your volume. On a differentiated product, that is usually the better bet.

Now the reverse case, which monitoring is uniquely good at surfacing. Suppose the market has drifted up: three competitors are at $44 and you are still at $40. Raising to $44 gives you $20 a unit, so you can lose 16 ÷ 20 = 20% of your units and come out level. A 10% price rise rarely costs a fifth of demand on a product people choose you for.

Kept in general form: to break even on a price cut of c% at margin m%, volume must rise by c ÷ (m − c). At a 25% margin, a 10% cut needs a 67% volume lift. That number, more than any dashboard, is what stops reflexive matching.

The hard part: knowing you are comparing the same thing

This is where price monitoring is genuinely difficult, and it is worth understanding before you evaluate any tool.

The same product is listed differently everywhere. Titles differ, pack sizes differ, bundles include an accessory yours does not, and variants are named inconsistently. Whatever you use — a spreadsheet or software — something has to decide that their listing corresponds to your product, and that decision is sometimes wrong.

The consequence for buying decisions is simple: be suspicious of any tool that presents every comparison as equally certain. You want to see which comparisons are solid and which are shaky, and you want a way to throw out the wrong ones. A silent wrong pairing is worse than no pairing at all, because you will price against it.

The other recurring distortions to control for:

• Shipping. Compare delivered cost for a realistic basket, not the product line alone.
• Tax display. Some platforms let each store choose whether displayed prices include tax. A competitor showing pre-tax prices looks around 20% cheaper in a 20% VAT market and is not.
• Currency and market. A store selling internationally may show different numbers to shoppers in different countries.

How often to check

For most e-commerce categories, daily is enough and weekly is defensible. Intraday monitoring matters in genuinely volatile categories — marketplaces with algorithmic sellers, electronics at launch, anything with surge behaviour — and is a cost with no benefit everywhere else. Be sceptical of "real-time" as a selling point; the useful question is whether you would act differently at 09:00 than at 15:00.

When you do not need software

If you sell 20 products and have two competitors, this is a spreadsheet and twenty minutes on a Monday. It costs nothing, and doing it manually for a month teaches you the shape of your market better than any tool can. Do not buy software for this.

The manual approach fails on three axes at once — how many products, how many competitors, how often — and it fails quietly: the file simply stops being updated. When you notice you last touched it six weeks ago, that is the buying signal, and it usually lands past 50 products or five competitors.

Where Pricemastr fits

Pricemastr is price monitoring for small and mid-sized stores, on any e-commerce platform.

Setup is one store URL, with no mapping of products to competitor URLs by hand. Your products come back paired with the same items at the competitors you choose, each pairing carrying a reliability indicator so you can see which comparisons to trust, and anything uncertain goes to a review queue for you to confirm or dismiss rather than being linked silently.

Paid plans re-check daily and send one morning email when something moves: new undercuts, sharp competitor drops, and competitors out of stock while you are in stock. Price history is kept so you can tell a promotion from a reposition. Suggested prices come from a rule you set — you decide, and Pricemastr never changes prices in your store. Pro and above add CSV export and on-demand re-checks; Max adds Slack or Discord delivery.

Basic is $0 for one competitor store and a weekly digest. Pro is $39/month ($390/year) — 3 competitor stores, 1,000 of your products. Max is $99/month ($990/year) — 10 competitor stores, 10,000 products. Enterprise starts at $199/month for negotiated quotas. See the pricing page, or the cost breakdown for this category if you are weighing options.

If your price spreadsheet is six weeks stale, start free — Basic costs nothing and needs no card.