On this page
- Step 1: Define what you actually need
- Step 2: Set criteria and weights
- Step 3: Find candidates
- Step 4: Shortlist
- Step 5: Ask for the same information from each
- Step 6: Verify, do not just collect
- Step 7: Score and decide
- Step 8: Negotiate and record the decision
- Choosing between a big and a small supplier
- Red flags
- Common mistakes
- A short glossary
- Keep reading
- Frequently asked questions
Key takeaways
- Decide your criteria and their weights before you look at any quote.
- Core criteria: quality, price and total cost, reliability, financial health, risk, service and fit.
- Ask for evidence: references, certificates, samples, financial statements.
- A weighted scorecard makes the decision fair and explainable.
- Check references by calling them. Most buyers never do.
Two quotes for the same service differ by 15 percent. The cheaper supplier has no references the buyer could call, a website that went live last month and a contract that auto-renews for three years. Most buyers sense the risk. Few can say exactly what they are weighing it against.
A method fixes that. It turns a vague feeling into a comparison you can explain to your boss, your auditor or yourself in six months.
Step 1: Define what you actually need
Write down the requirement before talking to any supplier. What is the purchase, how much, by when, to what standard and for how long? If you cannot write it, you cannot compare suppliers. See the procurement lifecycle for why specification matters so much.
Step 2: Set criteria and weights
Decide what matters and how much, before you see quotes. Doing it afterwards invites you to pick the weights that favor the supplier you already like.
| Criterion | What to look at | Example weight |
|---|---|---|
| Fit to requirements | Does it do what you need, to the standard you need? | 25 percent |
| Price and total cost | Price, plus delivery, setup, support, renewal and exit costs | 25 percent |
| Reliability | On-time delivery record, capacity, references | 15 percent |
| Quality | Standards, certifications, defect history | 15 percent |
| Financial health | Years in business, accounts, credit signals | 10 percent |
| Risk and compliance | Security, insurance, legal standing | 10 percent |
Step 3: Find candidates
- Check your existing suppliers first. A known supplier is lower risk.
- Ask colleagues and industry contacts for recommendations.
- Search trade directories and professional bodies.
- Use review sites with care and read the negative reviews. See how to read G2 ratings for software.
- For larger purchases, run an RFI to learn who exists. See RFI vs RFP vs RFQ.
Step 4: Shortlist
Cut the list to three to five suppliers on basic filters: can they meet the core requirement, are they the right size for the contract, do they operate in the right region, and do they meet any must-have standards. Drop any that fail a must-have before you spend time on quotes.
Step 5: Ask for the same information from each
Send every candidate the same requirement, questions and deadline. Request: a price broken into components, delivery or implementation plan, references, relevant certificates, insurance, financial information and sample contract terms.
Step 6: Verify, do not just collect
- Call references. Ask them what went wrong and how the supplier handled it. Ask about timeliness, quality and how the supplier behaves when there is a problem.
- Check certificates. Confirm they are current and cover the right site or service.
- Check finances. Review accounts or a credit report for higher value work.
- See it in practice. Ask for samples, a pilot or a site visit for important purchases.
Risk checks for higher value purchases follow the lines in our vendor due diligence checklist.
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Step 7: Score and decide
Scores are 1 to 5 per criterion, multiplied by the weight. Supplier A: fit 4, price 3, reliability 5, quality 4, finances 4, risk 4. Supplier B: fit 4, price 5, reliability 3, quality 3, finances 3, risk 2. With the example weights, A scores 3.9 and B scores 3.65, even though B is cheaper. The numbers are invented. The point is that the weighted method surfaces what a price comparison hides.
Have at least two people score independently, then compare. Differences show where more checking is needed.
Step 8: Negotiate and record the decision
Use the competing bids to negotiate with the top one or two. Write a short note on why the winner was chosen. It protects you in audits and when someone asks later. See types of procurement contracts for choosing the contract structure.
Choosing between a big and a small supplier
| Larger supplier | Smaller supplier | |
|---|---|---|
| Strengths | Stability, capacity, broad capability, mature processes | Attention, flexibility, speed, willingness to adapt |
| Weaknesses | Less attention to you, rigid terms, slower to change | Capacity limits, financial fragility, key person risk |
| Good fit when | The purchase is critical and standard | You are a significant customer and need adaptation |
| Watch for | Being a small fish and getting poor service | Dependence on a few people or a single customer |
There is no rule that big is safer or small is better. Ask where your business ranks in their customer list. A medium-sized customer of a small firm often gets better service than a small customer of a giant.
Red flags
- No references, or references they will not let you contact.
- A price far below all others without a clear reason.
- Unwillingness to share basic company or certificate information.
- Vague answers to specific questions.
- Pressure to sign quickly.
- Insistence on their contract without discussion.
- Changes to bank details requested by email.
- Poor responsiveness before the sale. It rarely improves after.
Common mistakes
- Choosing on price alone. See total cost of ownership.
- Setting criteria after seeing quotes.
- Skipping references.
- Comparing unlike things. Different assumptions make prices incomparable. Normalize the requirement.
- Ignoring exit. How hard would it be to leave this supplier?
- One decision maker. A single person can miss risks others would catch.
A ready scoring sheet is available in the supplier evaluation scorecard template, and our vendor comparison matrix helps with software choices.
- Requirement written down.
- Criteria and weights agreed before quotes.
- At least three candidates compared for significant purchases.
- Same information requested from every candidate.
- Two references called per finalist.
- Certificates and insurance verified.
- Financial health checked for higher value deals.
- Scores recorded by two people.
- Decision rationale written down.
A short glossary
- Qualification. Checking that a supplier meets minimum requirements before inviting a bid.
- Evaluation criteria. The factors, with weights, used to compare bids.
- Reference check. Contacting a supplier's customers about their experience.
- Single source and dual source. Buying from one supplier, or deliberately from two.
- Due diligence. Checks on finances, risk and compliance.
- Weighted scoring. Multiplying scores by importance and adding them up.
Keep reading
Once you have chosen, agree terms with types of procurement contracts, onboard with the vendor onboarding guide and plan reviews with vendor performance management.
Frequently asked questions
What are the most important criteria for choosing a supplier?
Fit to your requirement, price and total cost, reliability, quality, financial health and risk. The weights depend on the purchase.
How many suppliers should I compare?
Three to five for a significant purchase. For small purchases, two or three quotes are usually enough.
How do I check a supplier's references?
Call two or three customers of similar size. Ask what went wrong, how it was handled and whether they would hire the supplier again.
Should I always choose the cheapest supplier?
No. Compare total cost over the life of the purchase, including delivery, support and exit. Cheaper suppliers can cost more once reliability and quality are counted.
What is a supplier scorecard?
It is a weighted comparison of suppliers against agreed criteria. Each criterion is scored, multiplied by its weight and summed.