Supplier quotes: 4 facts to check first

Before accepting a supplier quote, check past prices, whether the comparison is adequate, price timing, and any cost breakdown you need.

Key takeaways

Collect dated prices for the same or similar items.
Check whether the items and order sizes are comparable.
Compare price changes with your intended order date.
Ask for a cost breakdown when price comparisons leave questions.

A price can look ordinary on the page and still be high compared with what the same item cost you last season, or with what a similar item costs elsewhere. Without a check, the supplier's number is the only thing you have to compare against.

A quote also carries more than one question. Is the number fair? Is the comparison you are using good enough to answer that? Did the market move between your last purchase and this one? And if the number cannot be checked by comparison alone, what sits behind it? Each of those questions needs a different fact, and each fact is easy to skip when a supplier is waiting for an answer.

The federal government publishes its rules for checking prices in the Federal Acquisition Regulation (FAR). Those rules bind federal contracting officers, not your purchase orders, so you should not treat them as rules for your business. What they offer is a set of questions that a careful buyer can borrow. The questions are the useful part, and they can be adapted to a small business that buys parts, supplies, or inventory.

This post turns that guidance into four facts to check before you accept a supplier quote: the prices that the same or similar items have sold for, whether that history is enough to judge the quote, how prices have moved against your order date, and whether you need the cost behind the number.

What the federal rule says about checking a price

The federal rule says the government may use various price analysis techniques and procedures to ensure a fair and reasonable price. The FAR section on proposal analysis techniques describes those methods.

Unless an exception under FAR 15.403-1(b)(1) or (b)(2) applies, the contracting officer must obtain appropriate, uncertified data on past sales of the same or similar items. The contracting officer must then decide whether that data is adequate for evaluating the reasonableness of the price.

Two ideas come out of that passage. Past prices are a starting point under that requirement. And having past prices is not the same as having enough of them to judge a new price. The four facts below follow that order. They add timing, which comes from a different source, and cost, which the same section also covers.

Fact 1: past prices for the same or similar items

The first fact is what the same or similar items have sold for before.

For a buyer, the simplest source is your own invoices. Pull the invoices for the same item from your recent orders. If you buy close substitutes, pull those too. Write the date next to each price. A number without a date tells you little about where prices stand now, because you cannot tell whether it is old news or a current figure.

Your own history is not the only source. Earlier quotes for the same item, and any past price lists a supplier has given you, are also worth keeping. Store each one with its date and the supplier's name, so you can see which figures came from where. This is my suggestion, not a requirement of the rule.

Be careful with the word "similar." The rule asks about items that are the same or similar, not items that share a name. A different grade, size, or pack count is a different item, and I would note that difference in your records so you do not compare apples with oranges. A substitute that matches the product name but not its specification can make the comparison misleading in either direction.

For related ordering checks, see purchase order item entry.

Fact 2: whether your history is enough to judge the quote

The second fact is whether your price history is enough to judge the quote. The federal rule does not stop at asking for past prices. It asks the contracting officer to determine whether the data is adequate for evaluating the reasonableness of the price, so having some data is not the same as having enough.

Adequacy depends on the question you are asking. These are the checks I would run before deciding:

Do the past items match this quote closely enough to compare? Check specification, not just name.
Are the dates recent enough that the comparison still means something? A price from a long time ago may describe a different market.
Is the history adequate for this comparison?
Does the history come from the same kind of order? A large bulk order and a small reorder may not be comparable.

If any answer is no, you may not yet have enough to judge the quote. That is a useful result too. It tells you to keep looking before you commit, and it tells you what to look for. Ask the supplier for a dated history, ask a second supplier for a comparable quote, or wait until you have a few more invoices to compare.

Fact 3: when prices moved compared with your order date

The third fact is timing: when prices moved, compared with the date you would place the order. An OpenStax managerial accounting textbook gives an example of how timing can change results. In it, a retail company uses a last-in, first-out (LIFO) inventory system. If the store manager is evaluated on either cost containment or profit, the manager can postpone a decision to purchase inventory until the beginning of the next fiscal year if prices have risen.

The same example says that the company ordered 500,000 units of inventory in either scenario. The timing of those orders, given the changing prices, had a significant effect on income from operations. The quantity stayed the same, and the date still mattered.

The example is about a retailer's income, not a supplier quote, and it describes one inventory system. Its lesson for a buyer is narrower. Before you accept a quote, check whether the price has moved since your last purchase, and whether a different order date would change the result.

For a practical check, ask three questions. When did you last buy this item, and at what price? Has the supplier said anything about why the price is changing? And is this quote dated, with a clear expiry? A quote without a date leaves you guessing about the market at the moment you accepted it. If the price has risen since your last order, ask whether waiting would change the number or whether the increase reflects a move that will hold.

Check the order itself alongside the price using these shop replenishment checks.

Fact 4: whether you need the cost behind the quote

The fourth fact is whether a comparison of prices settles the question, or whether you need the cost behind the quote. The federal rule speaks to this directly. It says that cost analysis may also be used to evaluate data other than certified cost or pricing data, to determine cost reasonableness or cost realism, when a fair and reasonable price cannot be determined through price analysis alone.

The buyer's version of that step is asking the supplier to explain the cost behind the number. Ask for a breakdown of the parts of the quote you can check, such as materials, labor, freight, and any fees. Then compare that breakdown with what you already know about the item.

A breakdown does not have to be complicated. You are looking for the parts of the price that you can verify. If the materials line is a known input you have bought before, you can check it against your invoices. If labor is included, ask how many hours and at what rate. If freight or handling appears, ask how it is calculated. Each line gives you something to compare, and each line you cannot explain is a question for the supplier.

If the supplier cannot or will not explain the cost, record that answer with the rest of your notes. It is one more fact to weigh before you decide. It does not prove the price is unfair, and it does not prove the price is fair. It tells you that the price cannot be checked the way you would like, which matters when you decide how much to rely on it.

When to bring in another expert

Bring in another expert when the comparison is hard to make. The federal rule allows this. The contracting officer may request the advice and assistance of other experts to ensure that an appropriate analysis is performed. The FAR section on proposal analysis techniques describes this step.

For a small business, the equivalent might be an accountant, a more experienced buyer on your team, or a contact who knows the product line well. The point is the same: a second set of eyes can catch what a single reviewer misses. An outside reviewer is especially useful when the price is large relative to what you usually spend, when the item is specialized, or when the supplier's cost breakdown raises questions you cannot answer yourself.

The same FAR section also points to written guidance. It says the Air Force Institute of Technology (AFIT) and the Federal Acquisition Institute (FAI) jointly prepared a five-volume set of Contract Pricing Reference Guides to guide pricing and negotiation personnel. Treat them as background reading rather than a rulebook for your purchase orders.

Mistakes to avoid when you check a quote

The mistake is relying on a single invoice without checking its comparability and adequacy. A single invoice may be perfectly usable once you have confirmed the specification, order size and date line up with the quote in front of you. The error is treating it as settled proof before those checks are done. A second habit costs just as much: skipping the date on a price you collect, which leaves you unable to tell whether the figure describes this month's market or last year's.

Gather the four facts before you accept a quote

Gather all four facts in one place before you accept a quote. Keep the notes with the purchase order. A single sheet is enough. The goal is that when you accept a price, you can say which facts supported it, and when you decline one, you can say why.

Here is the checklist:

Past prices. List the prices for the same or similar items, with dates and sources. Note any differences in grade, size, or pack count.
Adequacy. Note whether that history is enough to judge this quote, and say why or why not. If it is not enough, record what you would need to close the gap.
Timing. Note how prices have moved since your last order, when you would place this one, and whether the quote has an expiry.
Cost. If the price comparison does not settle the question, request the cost breakdown and record what you received, including any line you could not explain.

Each step is simple on its own. Together they give you a fair basis for judging a quote without needing an accounting background. They also make the next conversation easier, because you can show the supplier which comparisons you used and where the gaps are.

Over time, the notes become your own price history. That history is the same kind of record the federal rule asks a contracting officer to find, and it gets more useful each time you add to it. Review it at the start of each buying cycle, and you will spot prices that have drifted before they become a problem.

Illustrative example: compare before deciding

Suppose a dated invoice shows an illustrative unit price of $20 and a new quote shows $30. The difference is $10. Before deciding, check that the specification and order size match, compare the dates, and ask why the price changed. If the comparison still leaves questions, request a cost breakdown. The difference alone does not establish whether the quote is fair.

Today, take one current quote and attach a dated invoice for the same or a similar item. Note any differences and write down the question you need the supplier to answer.

Questions about checking a supplier quote

Is a single past invoice enough?

A single invoice may be enough if it is comparable and adequate for judging the quote. Check the item, order size and date before relying on it.

Must a small business follow these federal rules?

No. These federal rules bind federal contracting officers, not your purchase orders; use their questions as a buying checklist adapted to your business.