FIELD INTEL
SOUTHERN CA ELECTRICAL · 328 INVOICES$29,439 RECOVERED — SYNTERMINAL LIVE ENGAGEMENT
LANDSCAPE / IRRIGATION · 263 INVOICES153 PATTERNS · 12 JOBS · 1 SUPPLIER
CONTRACTOR INVOICE ERROR RATE35% CONTAIN AT LEAST ONE ERROR — IOFM 2025
NON-ITEMIZED QUOTE RATE75% — LANDSCAPE ENGAGEMENT FINDING
MAX OVERCHARGE MULTIPLIER FOUND29.23× — SINGLE LINE ITEM, LIVE DATA
AP RECOVERY PER $1B SPEND$3.5M SLIPS ERP CONTROLS — APEXANALYTIX 2025
PROFIT LOST TO PAYMENT ERRORS5–10% OF PROFITS — RADIUSPOINT 2025
CONSTRUCTION MATERIAL COSTSHIGHEST RATE SINCE PANDEMIC — AGC JUNE 2026
MORE INVOICESMORE PATTERNS · MORE RECOVERY · EVERY MONTH
SOUTHERN CA ELECTRICAL · 328 INVOICES$29,439 RECOVERED — SYNTERMINAL LIVE ENGAGEMENT
LANDSCAPE / IRRIGATION · 263 INVOICES153 PATTERNS · 12 JOBS · 1 SUPPLIER
CONTRACTOR INVOICE ERROR RATE35% CONTAIN AT LEAST ONE ERROR — IOFM 2025
NON-ITEMIZED QUOTE RATE75% — LANDSCAPE ENGAGEMENT FINDING
MAX OVERCHARGE MULTIPLIER FOUND29.23× — SINGLE LINE ITEM, LIVE DATA
AP RECOVERY PER $1B SPEND$3.5M SLIPS ERP CONTROLS — APEXANALYTIX 2025
PROFIT LOST TO PAYMENT ERRORS5–10% OF PROFITS — RADIUSPOINT 2025
CONSTRUCTION MATERIAL COSTSHIGHEST RATE SINCE PANDEMIC — AGC JUNE 2026
MORE INVOICESMORE PATTERNS · MORE RECOVERY · EVERY MONTH
ST-IF-TC-001 — INVOICE FORENSICS — TRADE CONTRACTORS
Something feels off.
It probably is.
Let us find it.
You've had the feeling before. A supplier invoice that doesn't quite add up. A job that came in over material budget and you couldn't explain why. A price that moved between the quote and the bill and nobody flagged it. That intuition is data. Synterminal is a research and data engineering firm. We take your supplier invoices, your quotes, your purchase orders — and we run forensic intelligence across all of it simultaneously. We can almost guarantee something is hiding in plain sight. The only question is how long it's been there.
// findings tied to source documents · no percentage of recovery · flat engagement
$29,439
Recovered · Southern CA
electrical · 328 invoices
electrical · 328 invoices
153
Billing patterns found
263 invoices · 1 supplier
263 invoices · 1 supplier
29.23×
Max overcharge multiplier
found on a single line item
found on a single line item
5–10%
Of profits lost to payment
errors — industry benchmark
errors — industry benchmark
// THE QUESTION EVERY CONTRACTOR ALREADY KNOWS TO ASK
"It's just the economy." Is it?
Your supplier has been raising prices. Material costs are up. The economy is volatile. Tariffs changed things. Every one of those facts is real — and every one of them is also cover for a billing pattern that has nothing to do with the economy. Price creep that started before the tariffs hit. SKU substitutions billed at multiples that bear no relationship to the actual grade difference between products. Charges appearing on invoices with no corresponding line on the quote. Quantities that don't reconcile with what arrived on the job site.
The economy moved prices. Your supplier's billing system moved prices further. The question Synterminal answers is which of those two things is on your invoice — and how much of what you've been paying belongs in the second column. Every contractor we've worked with had the intuition before we ran the analysis. The analysis confirmed it, quantified it, and gave them documentation structured for the conversation with their supplier.
Did your material costs jump more than your neighbors on the same job type?
Same supplier. Same materials. Different price trajectory. That asymmetry has a source.
Do your invoices ever show a different item than what you ordered?
SKU substitution billed at the higher-grade price with no documentation. Pattern 02 in the Synterminal pipeline.
Have you ever paid a charge that wasn't on the original quote?
Unquoted spend. Surcharges, handling fees, restocking charges that appeared after the work was done.
Does the same supplier seem more expensive on every job than they should be?
Algorithmic price creep. Small, consistent increments across every invoice. Invisible on any single bill. Obvious across the full history.
Have you paid the same invoice twice — or paid for a delivery that came up short?
Duplicate charges and quantity discrepancies. Two of the most common patterns in high-volume contractor AP.
Does your supplier's pricing move up faster than it moves down?
Asymmetric pass-through. Costs go up immediately. Credits and reductions arrive slowly — or not at all.
If any one of those questions landed — that's the engagement.
You don't need to have proof. You don't need to have caught anything yet.
You need to send us the invoices and tell us which supplier feels wrong.
We do the rest. The findings either confirm your intuition or clear the supplier —
either way you walk away knowing.
// WHAT THE DATA SAYS — ALL SOURCED
LIVE ENGAGEMENTS · INDUSTRY BENCHMARKS · 2025–2026
$29,439
Recovered from a single Southern California electrical contractor. 328 invoices. One supplier relationship. Overcharges hiding in plain sight across every job.
SOURCE: SYNTERMINAL LIVE ENGAGEMENT — DOCUMENTED FINDING
153
Distinct billing patterns found across 263 invoices from a single landscape and irrigation supplier. 12 jobs. 75% non-itemized quote rate. 29.23× max overcharge on one line item.
SOURCE: SYNTERMINAL LIVE ENGAGEMENT — DOCUMENTED FINDING
35%
Of supplier invoices contain at least one error — across industries. In trade contracting, with job-site receiving, verbal quotes, and high SKU density, the rate is higher.
SOURCE: SUPY / IOFM INDUSTRY DATA 2025
$3.5M
Overpayments that slip through ERP controls for every $1B in supplier spend — even in organizations with sophisticated systems. Mid-market contractors have less, not more, protection.
SOURCE: APEXANALYTIX RESEARCH, SEPT 2025
// LIVE ENGAGEMENTS — WHAT SYNTERMINAL FOUND
REAL CONTRACTORS · REAL INVOICES · REAL FINDINGS · DOCUMENTED
Case Study 01 — Electrical Contractor · Southern California
328 invoices. One supplier relationship.
Nobody had looked at all of them at the same time.
A Southern California electrical contractor had been working with the same
electrical distributor across multiple commercial jobs.
The relationship was solid. Pricing felt normal.
Nothing obvious was wrong. That's exactly the condition
where the overcharge lives longest.
Synterminal ran forensic invoice comparison across 328 invoices — every line, every SKU, every price — against the quoted rates and the distributor's own published pricing. The pipeline found overcharges across six of the documented patterns: price above quote, SKU substitution, quantity discrepancy, duplicate charges, algorithmic price creep, and unquoted surcharges. The findings package documented every single discrepancy with the exact invoice line, the exact agreed reference, and the dollar delta.
The conversation with the supplier was short. The documentation was not disputable.
Synterminal ran forensic invoice comparison across 328 invoices — every line, every SKU, every price — against the quoted rates and the distributor's own published pricing. The pipeline found overcharges across six of the documented patterns: price above quote, SKU substitution, quantity discrepancy, duplicate charges, algorithmic price creep, and unquoted surcharges. The findings package documented every single discrepancy with the exact invoice line, the exact agreed reference, and the dollar delta.
The conversation with the supplier was short. The documentation was not disputable.
$29,439
Total recovered
328
Invoices analyzed
6
Pattern types found
1
Supplier relationship
Case Study 02 — Landscape & Irrigation Contractor
263 invoices. 12 jobs. One supplier.
153 billing patterns. 75% of quotes were non-itemized.
A landscape and irrigation contractor brought a supplier relationship
that had been running for years across multiple residential and commercial jobs.
75% of the original quotes were non-itemized — lump-sum figures
with no line-by-line breakdown. That's not unusual in the trade.
It is, however, the condition that makes overcharging easiest to hide.
When there's no line-item reference to compare against,
any invoice line can be whatever the supplier's system generates.
Synterminal reconstructed the reference pricing from distributor price books, commodity indices, and the contractor's own job records — then ran the full pipeline against all 263 invoices across all 12 jobs simultaneously. 153 distinct billing patterns identified. The maximum overcharge on a single line item was 29.23× the correct price — a product substitution billed at a multiple that had nothing to do with the actual grade differential between items.
This only became visible when all 263 invoices were held simultaneously. No single invoice showed the full picture.
Synterminal reconstructed the reference pricing from distributor price books, commodity indices, and the contractor's own job records — then ran the full pipeline against all 263 invoices across all 12 jobs simultaneously. 153 distinct billing patterns identified. The maximum overcharge on a single line item was 29.23× the correct price — a product substitution billed at a multiple that had nothing to do with the actual grade differential between items.
This only became visible when all 263 invoices were held simultaneously. No single invoice showed the full picture.
153
Patterns identified
29.23×
Max overcharge multiplier
263
Invoices analyzed
75%
Non-itemized quote rate
// THE SIX PATTERNS — WHAT SYNTERMINAL RUNS ON EVERY ENGAGEMENT
ALL SIX SIMULTANEOUSLY · EVERY LINE · EVERY INVOICE · EVERY SUPPLIER
Pattern · 01
Price vs Quote Gap
The invoiced price for an item is above the price on the original quote or agreed rate.
The most common pattern and the easiest to miss at volume
because individual line deltas are small — $0.40 on a fitting, $1.20 on a spool of wire.
Multiplied across hundreds of line items across dozens of invoices,
the gap compounds into thousands. Synterminal flags every instance
where the invoiced unit price exceeds the agreed reference, traces it
to the exact quote line, and documents the total delta.
Pattern · 02
SKU Substitution
A different item was shipped and billed than what was quoted or ordered.
Sometimes the substitution is legitimate — the requested item was out of stock.
Often the substituted item is a lower grade billed at the higher grade's price.
In the landscape engagement, a single substitution pattern was billed at a
29.23× multiplier with no documentation justifying the price difference.
The pipeline compares item descriptions, catalog numbers, and grade classifications
simultaneously to surface every substitution event in the invoice history.
Pattern · 03
Quantity Discrepancy
The invoiced quantity is above what was delivered or what appears on the job site
receiving records. High-frequency pattern in trade contracting
because delivery receipts are often signed on the job site by someone
who didn't count every box, and the invoice arrives in the office
days later with no easy way to reconcile. Synterminal cross-references
invoice quantities against every available delivery record, purchase order,
and job-site documentation to flag every quantity that doesn't match.
Pattern · 04
Duplicate Charges
The same charge appears twice — either on the same invoice or across
two separate invoices for the same delivery event.
More common than most contractors realize because supplier billing systems
generate invoices from delivery records, and a delivery that gets re-entered,
corrected, or reprocessed can generate a second invoice for the same goods.
Without holding the full invoice history simultaneously,
the duplicate looks like a legitimate second delivery.
Synterminal catches every instance where the same charge, date, and item
appear more than once across the full engagement history.
Pattern · 05
Algorithmic Price Creep
A supplier's pricing system increments the price on a recurring item
by a small amount — 1.5%, 2%, 3% — on a schedule that has nothing to do
with commodity markets or contract renegotiation.
The increment is too small to trigger a review on any individual invoice.
The pattern only becomes visible when you hold every invoice for that item
simultaneously and plot the unit price over time.
Synterminal runs a time-series price analysis on every recurring SKU
to surface drift that no single invoice review would catch.
Pattern · 06
Unquoted Spend
Charges appear on invoices for items, fees, or services that were never
on the original quote or purchase order.
Handling fees. Restocking charges. Fuel surcharges. Small-order minimums.
Environmental disposal fees. Each is individually defensible.
Collectively, across a supplier relationship running dozens of deliveries per month,
they represent a systematic layer of charges the contractor never agreed to pay.
Synterminal flags every line item that has no corresponding reference
in the quote or PO document history.
// WHO THIS IS FOR
ANY TRADE · ANY SCALE · MORE INVOICES MEANS MORE PATTERNS
Electrical · Mechanical · Plumbing · HVAC-R
Trade Specialty Contractors
You buy from electrical distributors, PVF houses, HVAC supply houses.
SKU-dense catalogs. Price lists that update constantly.
The gap between your quoted price and your invoiced price
compounds across every job, every delivery, every supplier relationship.
This is the core engagement. The electrical contractor case study
is the proof of concept. Your invoices have the same anatomy.
Landscape · Irrigation · Site Work
Landscape & Outdoor Trade
Non-itemized quotes are the norm in landscape and irrigation.
That's not a problem — until the invoice arrives.
When 75% of your quotes have no line-by-line breakdown,
every invoice line is effectively unanchored.
The supplier knows that. Synterminal reconstructs the reference pricing
from distributor price books, commodity data, and your own job records —
and runs the full six-pattern analysis against every invoice.
General Contractors · Construction Managers
General Contractors
More subcontractors. More supplier relationships. More invoices.
More surface area for overcharges to hide.
The GC has supplier invoices, subcontractor invoices, equipment rental,
and temporary labor — all flowing through an AP function
that was not built to run forensic comparison on every line.
The more invoice volume you have, the more Synterminal finds.
That's not a claim — it's a mathematical property of the engagement.
Public Works · Residential · All Others
Every Other Contractor
Public works contractors buy against bid schedules with unit prices
on file in public documents — which makes overcharge recovery
easier to document, not harder.
Residential contractors have lower invoice volume but the same six patterns.
If you receive supplier invoices and have any agreed price —
a quote, a PO, a bid schedule, a verbal agreement you wrote down —
the analysis runs. Scale doesn't disqualify you. It just changes the scope.
// ST-TC-002 — IT GETS SMARTER EVERY MONTH IT RUNS
THE ATTACK SURFACE YOUR SUPPLIERS CAN EXPLOIT SHRINKS OVER TIME
// WHY ONGOING ENGAGEMENT COMPOUNDS
The first month finds what's already there. Every month after narrows what they can do next.
A one-time forensic audit finds historical overcharges. That's valuable — the electrical contractor recovered $29,439 from a single engagement. But there's a second value that compounds over time and most contractors never access it.
Every invoice Synterminal processes adds to the reference base. Pricing history becomes richer. Pattern detection becomes more sensitive. The supplier's behavioral fingerprint — how they price, how they substitute, how they drift — becomes part of the model. A new invoice that deviates from that fingerprint gets flagged immediately, not discovered months later in a retrospective audit.
The second effect is supplier behavior. When a supplier knows their invoices are being checked systematically, the attack surface shrinks. Not because they become honest — because the cost of the overcharge now includes the certainty of being caught. "It's just the economy" stops working as cover when you can show that their price moved 3× faster than the commodity index did.
The engagement model is simple: send invoices as they arrive. We run the pipeline. Findings come back structured for your next conversation. Every month the model gets faster, more precise, and the gap between what you should pay and what you're being billed gets harder for your supplier to exploit.
// HOW THE ENGAGEMENT COMPOUNDS — MONTH BY MONTH
Mo. 01
Baseline — historical audit
Full six-pattern run across all available invoice history. Every finding documented. Reference pricing established for every recurring SKU. The first conversation with your supplier is grounded in their own documents.
Mo. 02
New invoices enter the pipeline
Each new invoice compared against the established reference base. Historical patterns act as a detection layer — anything that matches a known pattern flags immediately. New patterns surface against a richer baseline.
Mo. 03+
Supplier fingerprint established
Pricing behavior, substitution frequency, surcharge patterns, and drift rates are now modeled per supplier. A price move that contradicts the supplier's own established behavior triggers a flag before the invoice is paid — not after.
Ongoing
Attack surface shrinks
The margin your suppliers can exploit through invoicing error, substitution, and price creep contracts with every passing month. You stop absorbing charges you can't see. The savings are structural, not a one-time recovery.
// HOW AN ENGAGEMENT RUNS
SEND → RUN → DELIVER → PROTECT
Step · 01
Send
Send your supplier invoices and whatever reference you have — quotes, purchase orders, job records, bid schedules. Any format. If you only have PDFs and a gut feeling, that's enough to start. We sort it, we scope it, we tell you what the engagement covers.
Step · 02
Run
All six patterns run simultaneously across every line of every invoice. Where reference pricing doesn't exist in your documents, Synterminal reconstructs it from distributor price books, published commodity indices, and market data. Nothing gets skipped. Human eyes on every significant finding before it leaves our system.
Step · 03
Deliver
Structured findings package: overcharge table, pattern summary, unquoted spend list, full PDF report. Every finding traced to exact invoice line and exact reference document. Formatted for the conversation with your supplier. You know exactly what to say and exactly what to show them.
Step · 04
Protect
Ongoing engagement: new invoices enter the pipeline as they arrive. The model gets sharper. Patterns get flagged faster. The attack surface your suppliers can exploit on your invoices shrinks every month. You stop paying for the privilege of trusting your supplier's billing system.
// OPEN AN ENGAGEMENT
TRADE CONTRACTORS · ALL TRADES · ALL SCALES · SCOPE QUOTED SAME DAY
// YOU ALREADY HAVE THE INTUITION. WE HAVE THE INFRASTRUCTURE.
Bring the
invoices that
feel wrong.
invoices that
feel wrong.
Tell us which supplier. Tell us which job felt expensive.
Tell us what you noticed and couldn't explain.
We take that and run it. The findings either confirm it
with dollar amounts and documentation — or clear the supplier.
Either way you know. First conversation free.
Scope quoted same day. Flat engagement, all findings yours.
Name
Email
Your Trade
Approx. Monthly Invoice Volume
// research@synterminal.com · scope quoted same day · findings are yours
"It's just
the economy."
Is it?
the economy."
Is it?
Your supplier raised prices. The economy moved. But did it move as far as your invoices did? Synterminal maps every invoice against every agreed price, every commodity reference, and every pattern in your supplier's billing history. Something is hiding in plain sight. We find it.
// OPEN A REQUEST
Send your invoices. Tell us which supplier feels wrong. We scope the engagement and quote same day. No percentage of recovery — flat engagement, all findings yours.
Bring the
ugly problem.
ugly problem.
If a pricing question, data mess, supplier problem, monitoring task, or operational mystery has been sitting untouched — that is the job. Synterminal investigates what others don't have the infrastructure to find.
// OPEN A REQUEST
Direct intake for difficult information problems. Physical markets, procurement, pricing, supply chain, entity resolution, litigation support. Describe the problem. We scope the engagement.