You wanted invoice checking. SubBase is a procurement system.
SubBase runs materials buying end-to-end — field requests, POs, deliveries, vendor accounts — and it's a serious tool for shops that want that. But if you signed up mainly to catch billing errors, you're running a whole workflow to get one answer. CheckIT gives you that answer from the documents you already have.
No workflow for your crew to adopt. No vendors to onboard. Works whether you keep SubBase or not.
Quick verdict
What SubBase does
SubBase deserves a straight description: it's a well-built construction procurement system, made by a third-generation builder for trade subcontractors. It runs the full materials-buying loop in one place — material requests from the field, RFQs and quote leveling, POs, delivery tracking, invoice matching (about 21 seconds per invoice, with Match / Partial / No Match results), AP approvals, and a curated vendor network that includes Ferguson, Hilti, Colony Hardware, and SiteOne.
- Material requests + RFQ leveling + PO dispatch
- Invoice matching against the SubBase-issued PO
- AP approval pipeline with role-based permissions
- Two-way sync with QuickBooks, Sage, Viewpoint, Procore, Acumatica, CMIC, and Foundation
It's a credible, well-built system. The catch is structural, not a flaw: to get the invoice checking, your whole shop adopts the workflow around it.
- Invoices from vendors off the SubBase Network, or bought outside a SubBase PO — counter tickets included
- The 60- and 80-line supply-house invoice — switchers tell us the matching is built for short PO buys, around ten line items
- Whether the invoice matches the quote you bid from, a rate sheet, or your own price history — matching is to the SubBase PO
- A dollar figure on every difference — match results come back as Match / Partial / No Match
- Anything at all, on the jobs where the office and field never fully adopted the workflow
What CheckIT Invoice does
CheckIT Invoice does one job with zero entry: it checks every line of an invoice against the quote you bid from — or a rate sheet, or your own price history — and tells you exactly what's different, where, and by how many dollars. It runs on the documents you already have, from any vendor, bought any way.
- Every line checked against the quote, rate sheet, or your own price history
- A dollar figure on every difference, ranked by how much it matters
- 75% less manual review time — minutes per document
- One-click dispute emails with the line-item evidence attached
No procurement workflow to adopt. No vendors to onboard. Nothing for the field to learn. Drag in the documents — findings in minutes. And the books stay yours: the QuickBooks Online connection is live — verified invoices push in as bills with per-line cost codes, retainage-aware. Run Sage instead? CheckIT sits in front of it the same way.
Feature comparison
If you bought SubBase to catch billing errors, you bought a warehouse to store one box.
SubBase is a real procurement system, and shops that want requisition-to-PO discipline get real value from it. But its invoice matching is one module inside that system, and it checks the invoice against the PO SubBase itself issued — from a vendor on its network, on a job where your office and field actually run the workflow. That's the price of admission for the billing answer: everyone works inside the loop.
CheckIT asks for none of that. It checks the invoice against the quote you bid from — or a rate sheet, or your own price history — no matter who sold you the material or how it was bought. Nobody in the field touches it. Nothing about how you buy changes. You send one job's documents and get back every difference, in dollars, in minutes.
That leaves two honest paths. If you adopted SubBase mainly for invoice checking and the procurement features sit unused, switch — that's what Culbert Plumbing did. If the workflow is genuinely earning its keep, keep it, and run CheckIT on the same invoices as your billing check. Either way, the free audit on one job tells you what the unchecked lines have been costing.
Why one plumbing contractor switched from SubBase to CheckIT
“I'm Eric Culbert, owner of Culbert Plumbing here in San Luis Obispo. We've been serving the Central Coast since 1979, and between service work and new construction, a lot of invoices cross our desk. Before CheckIT, verifying invoices against quotes meant hours of line-by-line checking — and errors still slipped through. Now CheckIT does it in minutes. We're getting eight to sixteen hours back every month, and it's caught thousands of dollars in billing errors we would have paid without blinking. If you're a contractor who cares about your margins, turn this thing on. It pays for itself.”
Stay on SubBase if the workflow is the point — and know what it won't check.
If field requests, PO discipline, and delivery tracking are why you bought it and your crews live in it, SubBase is doing its job. But its invoice matching only reaches what runs through its own loop: vendors on the SubBase Network, buys that went out as SubBase POs. The supply house that isn't on the network, the counter tickets, the account nobody set up — those invoices never get matched at all. And switchers tell us the matching is built for short PO buys — around ten line items — while the supply-house invoices the trades actually get billed on run 60 and 80 lines. That's the gap CheckIT covers: every vendor, every line, with or without SubBase underneath.
Switch if invoice checking was the point.
If you signed up to stop overpaying vendors and the procurement features mostly sit there, you're paying for a system to get one module's answer — and adopting a workflow to keep it. Run one job through the free audit before your next renewal and compare what each catches. Switching involves no migration: your documents are all CheckIT needs.
Or run both — CheckIT doesn't ask you to rip anything out.
Plenty of shops keep SubBase for buying and hand CheckIT the same invoices for the billing answer: does this match the quote we bid from, and if not, by how many dollars? No connection between the two systems is needed. The invoices SubBase already matched to its PO can still be checked against your quote — that's a different question, and it's the one that protects margin.
What this looks like in your trade
SubBase is built for trade subs. So is CheckIT — the difference is what has to change in your shop to get the billing answer.
Plumbing
Two buy waves, a dozen supply-house accounts, and counter tickets from every truck that stops at the counter. A procurement workflow only checks what runs through it — CheckIT checks every invoice against the quote you bid from, however the material was bought. It's why Culbert Plumbing switched.
CheckIT for Plumbing ContractorsElectrical
Copper and conduit reprice weekly, and gear deposits sit for months against a final invoice. The billing risk isn't in how the PO was issued — it's the price on the invoice versus the price you bid. CheckIT puts a dollar figure on that drift, line by line.
CheckIT for Electrical ContractorsHVAC
Equipment quoted in March ships in August, after two price-increase letters and a freight surcharge nobody agreed to. Whether or not the order ran through a procurement app, the invoice still needs checking against the number you bid. That's the whole job CheckIT does.
CheckIT for HVAC Contractors
The cost of not verifying
Here's what unchecked billing costs across the trades — on every invoice, not just the ones that run inside one workflow.
Across the trades, 39% of construction invoices contain an error.
As a share of invoice value — quietly compounding across every job.
Minutes per document instead of the better part of an hour.
Extrapolated from early-customer data. Results vary by invoice volume and contract complexity.
CheckIT vs. SubBase — common questions
Yes — no rip-out, and no connection between the two systems is needed. Keep buying through SubBase and send CheckIT the same invoices with the quote you bid from. Run one job through the free audit and compare what each catches before you change anything.
No. CheckIT checks billing; it doesn't manage buying. If you want field requests, POs, and delivery tracking in one system, that's what SubBase is built for. CheckIT answers the question that comes after: were you billed what you agreed to?
SubBase matches the invoice to the PO it issued, inside its own workflow, and reports Match, Partial, or No Match. CheckIT checks any invoice — from any vendor, bought any way — against the quote you bid from, a rate sheet, or your own price history, and puts a dollar figure on every difference, ranked by how much it matters.
Nothing to migrate and nothing to install. CheckIT runs on the documents you already have — send one job's quote and invoices and you'll have findings in minutes. Your SubBase data stays in SubBase; there's no dependency between the two, so you can decide with the results in hand.
CheckIT's pricing is published: plans from $455 per month per location with unlimited seats, and the first assessment is free. SubBase's subscription pricing is behind a demo. The honest comparison isn't the sticker — it's what each costs to get running and what the free audit finds on one of your own jobs.
Compare CheckIT to other tools
See CheckIT Invoice run against one of your invoices.
Send one job's quote and invoices and we'll show you every billing difference — in dollars — inside 48 hours. Or run it yourself in minutes. Then decide whether to switch, run both, or stay put.
No workflow to adopt. No vendors to onboard. Free audit: one job, 48 hours, no credit card. Plans from $455/mo. SubBase is a trademark of its respective owner; comparison based on publicly available information as of July 2026.