Supplier Quote Comparison Calculator

Defect rate changes the ranking.

Defect rate changes the ranking. Defect rate changes the ranking more often than the quoted price does.

Written and maintained by Mohit PatelLast checked August 4, 2026How we build these

Currency

Units

Supplier A unit price

Supplier A freight

Supplier A lead time

weeks

Supplier A defect rate

Supplier B unit price

Supplier B freight

Supplier B lead time

weeks

Supplier B defect rate

Cost of a defective unit reaching a customer

Cheaper all in

Supplier B

by $0.28 per unit

Supplier A all-in$8.32

Supplier B all-in$8.04

Quoted price difference$0.70

Lead time difference5 weeks

Defect cost changes the ranking more often than the quoted price does: a 3% defect rate on a $34.00 consequence adds $1.02 per unit. The 5-week lead time gap also costs working capital that appears in no quote.

How the Supplier Quote Comparison Calculator works

Defect rate changes the ranking more often than the quoted price does. A three percent defect rate on a thirty-four pound consequence adds over a pound per unit, more than most price differences between suppliers.

Also known as: compare supplier quotes · which supplier is cheaper · quote comparison on same terms

Making quotes comparable

Quotes arrive on different terms, at different quantities, in different currencies, with different inclusions. Comparing the headline numbers compares nothing.

Normalise everything to the same basis: the same quantity, the same incoterm, the same currency, and the same specification. That usually means going back to suppliers for clarification, which is itself informative about how they will be to work with.

The output should be landed cost per unit at your warehouse, on identical terms. Sellers who do this for the first time frequently find the cheapest quote is not the cheapest supplier, and the gap is often several percent.

What the price does not tell you

Lead time affects working capital directly: a supplier with a 90 day lead time requires more stock held than one at 40 days, and that difference has a cost.

Payment terms matter as much. A supplier requiring 100% before shipping and one offering 30 days after delivery differ by two months of working capital on every order.

Then quality, communication, flexibility on quantity, and willingness to hold stock. None appear in a quote and all affect the total cost of the relationship. A supplier 4% more expensive who accepts smaller orders and answers questions within a day is frequently the cheaper choice in practice.

Scoring beyond price

A weighted scorecard makes the non-price factors explicit rather than leaving them to a feeling. Price, quality, lead time, terms, communication, capacity, certifications, each weighted by how much it matters for this product.

The weights are the decision. A commodity product with no quality risk should weight price heavily. A regulated product where a defect creates liability should weight quality and certification far above price.

The value is in forcing the conversation before the decision rather than justifying it afterwards. Teams that score suppliers frequently discover they disagree about what matters, which is worth surfacing before the order rather than after the problem.

Verifying what you are told

Suppliers describe themselves favourably and some describe themselves inaccurately. Verification is cheap relative to the exposure.

Business registration and export licence are checkable. Certifications can be verified with the issuing body, and fake certificates are common enough that this is worth doing rather than accepting the PDF.

Factory audits, either in person or through an agent, confirm that the factory exists, is what it claims and can do what it says. For a first order of any size the few hundred pounds is well spent, and it also distinguishes a factory from a trading company presenting as one, which is a distinction that affects price, quality control and flexibility.

Second sources

The cheapest quote from a single supplier creates a dependency, and dependencies get priced by the other party once they are established.

Qualifying a second supplier costs sampling and time and buys negotiating position, continuity if the first fails, and capacity if demand exceeds one factory's output.

For any product that matters to the business, having a qualified alternative is worth the cost even if no order is placed with them. Suppliers who know they are the only option behave differently from those who know they are not, and the difference shows up in price, lead time and responsiveness long before it shows up in a crisis.

Where to go next

The Supplier Quote Comparison question rarely arrives on its own. These are the ones that usually come with it:

Landed Unit Cost Calculator — The quote is the smallest part.
Factory Price Negotiation Calculator — Below the floor, they recover it somewhere.
Product Sample Cost Calculator — The cheapest insurance in sourcing.
Etsy Fee Calculator — Every Etsy fee on one sale, itemised.

Not financial advice. Marketplace fees change, and they vary by country, plan and seller status. Every rate here is an editable default, not a quoted price, check the platform's current fee schedule before you price a product against it. This is not tax or business advice.

Frequently asked questions

How should I compare supplier quotes?

All-in per unit: goods, freight, duty and the expected cost of defects. Lead time and payment terms then adjust the comparison for working capital.

How do I estimate a defect rate?

From samples, from an inspection report, and from the supplier's own data if they will share it. A supplier who cannot state their defect rate probably does not measure it.