Automotive /Decisioning live field guide · 9 min

Parts-Invoice Reconciler

Matches each vendor parts invoice against the repair order and core-return log, flags price variances, missing credits and uncredited cores, and routes the exceptions for a person to clear — never adjusting the ledger itself.

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theater/demos/automotive_parts-invoice-reconciler.html · sandbox · read-only

Open

FIG. 1

The live demo, running on fabricated data. Open it to step through the full flow — every output is shown for a person to approve before anything happens.

How it would work

Reads each vendor parts invoice line by line, matches it against the purchase order, the goods-receipt note and the core-return log, and surfaces every price variance, short-ship and missing credit for a person to clear before the invoice is approved for payment.

Input 01

The invoice + the matching records

A vendor parts invoice — a clean PDF or a scanned, oil-smudged page — plus the purchase order it should match, the goods-receipt note for what was actually delivered, and the core-return authorisation for parts sent back.

Agent 02

Reads, matches, flags

Extracts each part line — part number, quantity, rate — then cross-checks the billed rate against the PO price, the billed quantity against the goods receipt, and the core credits against the return log, computing the dollar variance on every exception.

Output 03

An exception list, with its working shown

A reconciliation showing each flagged line, the evidence it came from and the total to withhold — held in a queue for the accounts-payable officer or parts manager to dispute, correct or approve before the invoice is paid.

Where it works well

It does the line-by-line three-way match every time, in full, and shows where each flag came from.

Done by hand it is the first thing skipped under a Friday invoice run — so a $13.50 rate creep on rotors and an unclaimed $170 core credit just get paid.
Best for a workshop or dealership processing parts invoices weekly across several suppliers: trade parts, oil, brakes, batteries, filters.
At dozens of invoices a fortnight, the recaptured hours go back to the parts manager chasing the real disputes, not re-keying line items.

The slow, invisible cost of parts reconciliation is the cross-checking — tracing each billed line back to the agreed PO price, the quantity actually received, and a core credit that was promised weeks ago in a separate log.

Where it works badly

It is confidently wrong when the records it matches against are stale or absent — and a clean-looking reconciliation hides that.

Weak where there is no goods-receipt step — if quantities are never recorded on delivery, it can check the price but cannot catch a short-ship.
A core credit it cannot match to a return authorisation gets flagged for review, not auto-cleared — but if your core returns live on paper dockets, it has nothing to match against.
On a one-supplier shop with a handful of invoices a month, your own eye on the statement already does this; the tool earns its place on volume and supplier spread.

The honest test

If you cannot say, right now, that the PO prices it checks against are the currently-agreed ones and that deliveries get a goods receipt booked — this tool makes a wrong "verified" faster, not safer.

Point it at a PO whose prices were renegotiated last month but never updated, or a delivery nobody booked a goods receipt for, and it will "verify" an invoice that is actually wrong, or flag a variance that isn't real. That is the trap.

What it doesn't do — and shouldn't

It flags and drafts the dispute. A person clears or pays. That boundary is deliberate.

WHAT IT DOES

Surfaces each variance with the PO, goods-receipt or core-return reference it used

Computes the dollar amount to withhold and drafts the dispute note to the supplier

Flags the lines it could not match cleanly rather than guessing them right

WHAT IT WON’T

Post the invoice or release the payment

Adjust the ledger or raise a credit note on its own

Decide whether a price rise is one you have actually agreed to accept

A parts invoice is a payable that posts to the accounts and an ATO tax-invoice record you rely on for GST. Withholding payment, disputing a charge, or accepting a price rise are commercial decisions with a supplier relationship and Australian Consumer Law obligations behind them. The accountable person stays on the decision because the consequence — the payment, the dispute, the audit trail — lands on the business, not the tool.

What your data has to look like

Each invoice line matched against a current PO price, a booked goods receipt, and a core-return log.

Typical readiness

across orgs we see, before the first job

Purchase orders with agreed prices, machine-readable

Needs shaping

A goods-receipt step that records quantities delivered

Needs shaping

A core-return log keyed to a return authorisation

Usual weak point

Invoice line items legible enough to extract

Usual weak point

Supplier identity and ABN on the invoice

Usually ready

The real first job

The matching records are usually the weak point — PO prices that drifted out of date, deliveries booked in by memory not a goods receipt, core returns tracked on a clipboard. Fixing how that purchase, delivery and core-return data is captured is usually the real first job — larger and more valuable than the matching layer on top. Once those records are trustworthy, every invoice after that reconciles fast and right by default.

Right fit if…

You process parts invoices weekly or fortnightly across several suppliers

Your POs carry the currently-agreed price per part, not a stale list

Deliveries get a goods receipt booked against the order

You run remanufactured parts with core charges and chase the credits

Walk away if…

One supplier, a handful of invoices a month — your own eye already does this

Quantities delivered are never recorded, so a short-ship can't be caught

PO prices live in someone's head or last year's spreadsheet

You want a tool that posts the payment and clears disputes for you

Open questions

The worried-buyer questions, answered straight

It can mis-flag a line — which is exactly why it never withholds or pays on its own. For each parts line it shows the billed rate against the purchase-order price, the billed quantity against the goods-receipt note, and the core credit against the return log, with the reference it used. The accounts-payable officer or parts manager reads those and decides whether to dispute, correct or clear. The tool surfaces the variance and drafts the supplier note; the person stands behind the payment decision.

It reads scanned and digital invoices and extracts each line — part number, quantity, rate — but a smudged or skewed scan can be misread, so the extracted lines are shown for a person to eyeball before anything is matched. The harder problem is usually not the invoice: it’s whether the purchase orders, goods receipts and core-return records it matches against are current and complete. Getting those into clean, structured form is the first piece of work, and the piece that pays off across every invoice after.

No. It removes the line-by-line cross-checking — the re-keying and the tracing of each charge back to a PO, a delivery and a core credit — so the person spends their time on the calls that matter: is this price rise one we agreed to, is this dispute worth the supplier relationship, why does this supplier keep short-shipping. The approval stays theirs. The capacity it frees goes back into managing suppliers, not auditing line items.

Current to what you’ve actually agreed with the supplier today. If a rate was renegotiated last month but the PO price list wasn’t updated, the tool checks against the old number and “verifies” an invoice that is really wrong — or flags a variance that you’ve already accepted. The honest test: can you say, right now, that the PO prices it checks against are the currently-agreed ones?

Parts invoices carry your supplier pricing, ABNs and commercial terms — your business’s confidential information, and ATO tax-invoice records you keep for GST. Any deployment runs against your own accounting and parts systems and your own data handling, not a shared pool — we scope where the data sits and who can see it as part of the build. The demo here runs entirely on fabricated data; Apex Trade Parts and NorthLink Auto are not real businesses.

Only if you wire that step in deliberately, and only after a person approves. By default it stops at the reconciliation: the exceptions, the evidence, and the drafted dispute. Posting a payable, releasing payment or raising a credit note are ledger actions with an audit trail behind them, so they sit on the far side of the human approval — the tool gets the invoice ready to clear; the accountable person clears it.

What it takes to build

3–4 weeks · 4 phases

Reused from template~65%

Bespoke to this skin~35%

stack · Claude · OCR · accounting API · review UI

What it would cost

Fixed scope, fixed price, fixed dates.

Bite-sized first piece

One supplier, one match rule, low risk

Pilot build

Most builds land here

Embedded support

Scale across suppliers on proof

Considering this for your workshop or dealership?

The honest place to start is a bite-sized first piece — one supplier's invoices, one match rule, low risk. Tell us where the margin leaks; we'll play it back, scope it, and show you what's possible.

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