How to Vet a Customer Before You Quote: The Contractor's Screening System

How do you vet a customer before you quote?

You run five checks, in order, cheapest first. Each clears the lead for the next step or tells you to slow down. None require software, a subscription, or more than fifteen minutes.

1. Read the pre-call signals. Where the lead came from and how the first message reads predict a lot before you ever speak.
2. Run the five-minute phone screen. Six questions, worked into a normal intake call — exact wording below.
3. Run the money screen. The funding question, the deposit test, and a ten-minute public-record check.
4. Score it. Green: quote it. Yellow: quote it with protection — deposit, progress billing, tight contract. Red: walk.
5. Check the customer against other contractors. The step that used to be impossible — covered at the end of this post.

Why bother? Because a real estimate isn't free — it's a site visit, drive time, and an evening of takeoffs. And if the job goes bad after you've started, it's materials and payroll you never get back. This post is the system; the companion piece catalogs the red flags that predict a client won't pay one by one.

Pre-call signals: what the lead's channel and first message tell you

A lead starts telling you whether it will pay before you ever speak. The first signal is the channel. A referral from a past customer or a trade partner arrives pre-sold — someone they trust vouched for you, so there's less price-shopping baked in. Our founder built his restoration company past $500k in twelve months almost entirely on referred work — the playbook is written up here. A repeat customer is nearly as good; someone who found your reviews and called you specifically is solid.

A shared lead from an aggregator sits at the bottom of the ladder — not because the homeowner is bad, but because the structure is: Angi's own help center says (as of August 2026) a project request is matched with up to five pros. Price-shopping isn't a personality flaw there, it's the design. Shared leads get the full screen, run faster.

The second signal is language. Watch the first message or first minute of the call for these:

• Price is the only question. 'How much for a roof' with no address, no scope, no timeline — you're a number in a spreadsheet.
• The last contractor was a crook. One bad experience is common; everyone-was-a-thief is a pattern, and you're its next chapter.
• They scope your job for you. 'Simple job, should take you half a day' — the customer has already decided what your work is worth.
• 'Money is no object.' People who can pay rarely say this. People who won't pay say it a lot.
• They ask you to bend something — skip the permit, invoice the insurance company for extra, start without paperwork. And the classic overpayment shape — 'I'll send a check for more than the amount, refund the difference' — is a scam, full stop.

One nuance from the restoration side: urgency alone is not a flag. When a pipe lets go, everything is urgent — that's the trade. Urgency plus evasiveness about money is the flag. And some leads were never going to hire anyone — they're collecting numbers for a landlord or an insurance argument, which is a big part of why customers ghost after estimates. Better to spot them before you spend the evening quoting.

The 5-minute phone screen: exact questions and what the answers mean

This is not an interrogation. Every question below fits naturally into an intake call you'd make anyway. Ask, then stop talking — how they answer matters as much as what they say, and defensiveness about normal business questions is itself an answer.

Two of these carry most of the weight. The previous-contractor question is the closest thing to a payment history you can get on a call: a customer who has churned through three contractors either can't be satisfied or won't pay to be, and the story they tell about the last one is the story they'll tell about you. The ownership question kills a quieter problem — work commissioned by someone with no authority to pay for it. Confirm who owns the property and who signs.

No single answer kills a lead. Screening is about stacking: one yellow flag means proceed with your eyes open; two or three should be treated like a red. The full red-flag list covers severity and the right protective response for each.

The money screen: the funding question, the deposit test, and payment history

The funding question

Ask it plainly: 'How are you planning to cover the project?' You're not being rude; you're being a business. A fundable job has a specific answer — savings, approved financing, an insurance claim with a claim number and an adjuster's name. On insurance work, ask whether the claim is approved, not just 'started': a homeowner still arguing with their carrier is asking you to finance the argument. 'We'll figure it out' is fine on a $400 repair; on a $30,000 job it's a red flag on its own.

The deposit test

State your standard deposit and payment schedule on the phone, before you drive out, and watch the reaction — it's the most predictive data point in this whole system. A normal customer asks a clarifying question and agrees; deposits are how contracting works. One who fights a standard deposit on a normal job is showing you, before you've lifted a tool, how they behave when it's time to pay. How much to ask is covered in our contractor deposit guide — and know your state's rules: California caps home-improvement down payments at $1,000 or 10 percent of the contract price, whichever is less, per the CSLB.

Then put the terms in writing the same day. A text works, and their reply — or silence — is more screening data:

The ten-minute payment-history check

Before quoting anything large, spend ten minutes in the public record. All of this is free:

• County court portal. Search the name in civil and small-claims records. One old case is noise; a pattern of disputes with contractors or landlords — on either side of the 'v.' — is signal.
• County recorder. Search the property address for mechanic's liens. A lien from the last contractor tells you how the last job ended.
• County assessor. Confirm the person you're talking to actually owns the property.
• Search the name plus the address. You may discover you're quoting a house that's mid-foreclosure or listed for sale.

Should you run a credit check on a homeowner?

Usually no — and not just because it's awkward. Consumer credit reports are regulated by the FCRA (15 U.S.C. §1681b): you need a permissible purpose, which in practice means the customer's written instruction or a genuine credit application where you're the one extending credit. For a standard cash-or-check job you have neither, and pulling a report anyway is a federal problem, not a faux pas. You also don't need one: the deposit test and the free checks above tell you more about a specific person than a score will. And if the invoice already went unpaid, go straight to the escalation playbook for customers who refuse to pay.

The walk-away math: what a bad job costs vs. what a missed job costs

Contractors take bad jobs because walking away feels expensive. Run the numbers once and it stops feeling that way. A worked example, every assumption on the table: a $12,000 job at 35% gross margin — $7,800 out the door in materials and labor, $4,200 gross profit. In the bad-job scenario, assume the customer pays 40% (deposit plus one progress payment) then stops, and you spend $500 on collections. Both assumptions are conservative: plenty of nonpayers pay less than 40%, and chasing them costs more than $500.

The two columns look close until you notice they're different kinds of money. The missed job costs profit you never had — and only costs the full $4,200 if the slot sits empty, which it rarely does if you have any pipeline. The bad job costs cash you already spent. At a 35% margin, clawing back $3,500 of burned cash takes about $10,000 of new, good work — most of another whole job, worked just to get back to zero. That's the mechanism behind the cash-flow deaths in the contractor failure statistics: it isn't lack of work that kills small contractors, it's work that doesn't pay.

Is there a database of bad customers for contractors?

Honest answer: no reliable public one exists — and not for lack of trying. Contractors have been asking for a blacklist for as long as contractor forums have existed (ContractorTalk's 'Bad Customers Black list' thread is a classic of the genre), and the graveyard of attempts is easy to tour. Bad Applz, a submit-and-search customer blacklist, is still online as of August 2026 but shows no signs of life — no dates, no user counts, no visible submissions. Contractor's Customers launched in January 2016, pitched in the trade press as the reverse of Angie's List — search a customer by name or address, read reviews from other trades. It is still up as of August 2026, still selling a $15-a-year membership, and its footer still reads 2015.

These sites all stalled for the same three reasons. One: anonymous, unverified accusations are a defamation lawsuit waiting to happen, so serious operators wouldn't post. Two: with no way to confirm the reviewer did the job, one competitor could poison a name, so nobody trusted what they read. Three: the chicken-and-egg problem — an empty database helps no one, so no one contributes, so it stays empty.

What replaced the blacklist is a verified network — and full disclosure, this is where we talk about our own product, because it was built for exactly this. TrustPro's customer vetting checks a lead against verified contractor reviews and payment history before you quote — reviews from real contractors on real jobs, not anonymous drive-bys. And it lives inside a CRM contractors already use to estimate, invoice, and get paid, which solves the empty-database problem the standalone sites died of. TrustPro is the only contractor CRM with a vetting network built in.

To be clear about what it replaces: step five of this system — the check that used to be impossible. Steps one through four are still yours. Software doesn't replace judgment; it just means you're no longer quoting strangers blind.

Frequently asked questions

• Angi Help Center — Opportunities and Leads FAQ (project requests matched with up to five pros)
• CSLB (California Contractors State License Board) — home-improvement down payment cap
• FCRA, 15 U.S.C. §1681b — permissible purposes of consumer reports (Cornell LII)
• ContractorTalk — 'Bad Customers Black list' forum thread
• Bad Applz — customer blacklist site (online but inactive, checked August 2026)
• Contractor's Customers — customer-review site for contractors (2015 copyright, checked August 2026)
• Landscape Management — 'New website lets contractors review customers' (Feb 2016)