Custom Payment Terminals for Field Businesses: Quote, Sign, and Collect On Site
A tablet that builds the quote from your own numbers while you are standing in front of the customer, takes the signature, and collects the deposit before you get back in the truck.
Most work is lost in the gap. You go out, you look at the job, you say you’ll get a number over tonight. Then the evening goes the way evenings go, the quote lands two days later, and by then the customer has two other numbers and no particular reason to prefer yours.
Nothing about that gap is a sales problem. It exists because the pricing lives somewhere you aren’t — a spreadsheet on the office machine, a supplier list in an email, a markup rule that only one person actually knows. Close that gap and the visit ends with a signature instead of a promise.
The gap between the site visit and the emailed quote is where jobs are lost. Closing it is not a sales technique — it is a software problem, and this is its shape.
Every trade’s math has the same shape
It looks different from the outside. One business works in square footage, another in volume, another in linear feet, another in unit counts. But the structure underneath is identical: you take one measurement, convert it into materials and hours by rules you already know, add what the job costs you before profit, and apply margin.
That means a quoting tool does not need to know your trade. It needs to hold your rules and apply them the same way every time.
Whatever you sell, the quote is built the same way: take a measurement, turn it into materials and hours, add what the job costs before profit, apply margin. Only the rules in each layer change from business to business.
Whoever is holding the tablet gets the same answer. The owner, the estimator, the son-in-law who started in March — the formula does not care who taps it, and it does not have a bad day. The judgment stays with you; it just stops living in one person’s head.
Where the numbers come from
A price is a stack of decisions you have already made. What a unit of material costs, how much of it you lose to waste and offcuts, how many hours the crew needs and what an hour is worth, what the truck and the equipment cost to put on site, what overhead each job has to carry, and what you intend to make.
Illustrative proportions — yours will differ, and that is the point. Each band is governed by a rule the owner controls, so the same measurement produces the same price whoever is holding the tablet.
This is where a custom system separates from a template. Material costs can be held against inventory you actually carry, so a quote knows the difference between something on the shelf and something that has to be ordered in with a lead time. Supply chain changes stop being a surprise you discover after you have quoted the job at last season’s price.
Grades and options become a switch on the screen rather than a re-quote. The customer asks what the better material would run, and you answer in the same minute, with the labor difference already accounted for.
The rules that turn a measurement into materials and hours are yours. Nobody else prices your work, and nobody has to remember the formula on site.
Unit costs, waste factors, and grade options live in one catalog. Supplier prices move, and every future quote moves with them.
The customer accepts on the tablet. Signature, timestamp, and location are captured with the agreement.
Deposit, progress payment, or the whole job — card, cash, or check, on the same screen that produced the number.
Taking the payment is the easy half
The terminal takes card through an inline payment form on the same screen, or records cash and check against the same agreement. What matters is what happens around it. Terms accepted, ownership confirmed, signature captured, device location recorded — all written as evidence attached to that specific quote, at that moment.
And a declined card leaves nothing behind. No half-sold job, no state to clean up, no awkward second visit to a record that says something happened when it didn’t. The sale either completed or it didn’t.
When it does complete, the job should already exist — scheduled, with the work derived from the same answers that priced it. We wrote up exactly how that works in One Derivation, Every Artifact, the engineering case study behind this platform.
What about financing the job?
On bigger tickets the deposit is not the obstacle — the total is. Plenty of customers will say yes at $400 a month who will not say yes at $12,000 today, and the businesses winning that work are offering terms on the spot.
You do not become a lender to do this, and you should not want to. Consumer lending is licensed, examined, and governed by disclosure rules that exist for good reasons. What you do instead is integrate a lending partner and stay firmly on the technology side of the line.
The pattern is the same across every consumer-lending partner: you hand over an amount, they own the application, you receive a decision. Your customer sees a monthly payment next to the price.
The pattern is consistent across the market. Point-of-sale lenders built for home services and contracting — Wisetack, GreenSky, Service Finance, Synchrony’s dealer programs — and general consumer lenders like Affirm all expose broadly the same integration: you send an amount and a customer contact, they return a link, the customer completes the application on the lender’s own hosted page, and a webhook comes back with a decision. Aggregators such as Acorn Finance and Hearth sit in front of several lenders at once and shop the application, which is often the better first integration because one connection reaches many balance sheets.
The critical design decision is the one drawn in red above: the application runs on the lender’s infrastructure, not yours. You never receive income documents, identity documents, or a credit file. Prequalification is typically a soft pull, so a customer can see what they qualify for without a mark on their credit, and the hard pull only happens if they proceed.
On your side it is a small amount of work: a financing state on the quote, an adapter per lender behind one interface, and a webhook handler that refuses to act twice on the same event. The payment path simply gains a third branch alongside pay in full and pay a deposit. Everything downstream — acceptance, evidence, scheduling — is unchanged, because it was never coupled to how the money arrived.
Which one fits you: Klarna finances to $10,000 and Affirm to $20,000 (on carts up to $30,000, with the customer covering the difference), both settled through your own Stripe account and paid to you upfront. Wisetack goes to $65,000 at a 3.9% merchant fee and is built for the trades — roofing, HVAC, remodeling, pool, foundation — which matters, because Affirm restricts most contractor categories. We wire whichever one clears your category and your ticket size.
Why this has to be custom
Off-the-shelf field software gives you somebody else’s idea of how your work is priced, and then charges per seat for the privilege. The parts that make your business yours — the waste factor you learned the expensive way, the access surcharge, the rule about which jobs need two people — end up in the notes field, which is another way of saying they end up nowhere.
A custom terminal starts from your rules instead. It can read your inventory, respect your supplier pricing, apply your margins, and produce a document that looks like it came from your company because it did. And it grows in whatever direction the business actually goes: change orders, progress billing, multi-crew scheduling, financing, a customer portal for the work in flight.
If you are earlier in that thinking, start with what an AI quote system actually is, then what happens after a quote is accepted. If you want to see the engineering underneath, the case study has the code.
Tell us how you price a job — the measurement you take, what it converts into, and where the numbers come from today. That conversation is the whole discovery, and it is usually shorter than people expect.
Start the conversationContinue through the Aubern AI website cluster.
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See how quote scope, pricing, and timelines can update in real time.
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