Quick answer
A kitchen invoice stops matching its quote when the two documents are built in different shapes: a lump-sum quote against a coded head contract, renamed lines, or bundled extras. The fix is one coded structure carried end to end, quote, order, progress claim, invoice, so month-end reconciliation is subtraction rather than translation.
Key points
- Quotes, orders, claims and invoices should carry the same lines in the same order. Mismatched shapes are where disputes breed.
- The classic failure is a lump-sum sub quote against a coded head contract, with you translating between them every month.
- Renamed descriptions, bundled extras and silent variation edits are the three small drifts that break reconciliation mid-programme.
- Part-complete months work fine on coded lines: claim a percentage of each line, not a lump guess.
- Ask for the coded structure before you sign. A supplier who quotes in codes can invoice in codes.
The claim is due Friday afternoon and the kitchen line will not tie out. Your claim to the client is measured quantities against coded lines, block by block. The kitchen sub's invoice says 'kitchens x 8, level 2, part complete' and one number. Between those two documents sits you, a spreadsheet, and three hours you do not have, rebuilding somebody else's number into a shape the quantity surveyor will certify. The sub is not dodgy. The invoice is probably even right. You still cannot prove it, and unprovable is what gets a line held at review.
Play that forward across a two-year programme and the maths gets grim: a monthly translation exercise, a running argument about what was claimed last time, and a retention conversation at the end where nobody can agree what was ever delivered. None of it comes from bad faith. All of it comes from documents that do not share a shape.
The fix is structural and boring, which is why it works. One set of lines, established at quote stage, carried unchanged through the order, the progress claims and the invoices. Here is how the mismatch happens, and how to set the paper up so month-end takes minutes.
Why doesn't the kitchen invoice match the quote?
Almost never because the total is wrong. The money is usually close. What fails is the mapping: line seven of one document has no counterpart on the other, so checking becomes interpreting. Four causes account for most of it.
- Different shapes entirely. The head contract is coded line items; the sub quoted lump sums per kitchen type. Nothing maps to anything, and every claim is a manual rebuild. This is the big one, and it is locked in the day you accept the quote.
- Renamed lines. The quote said 'dry underbench cabinetry'; the invoice says 'base units L2'. A human can guess they match. A reconciliation cannot run on guesses, and the QS will not.
- Bundled extras. Toe-kick, cutlery inserts and catches were their own lines on the quote, then arrive inside 'sundries' on the invoice. The totals drift apart and nobody can say where.
- Silent variations. A change got agreed on site, the invoice quietly grew, and no new line records why. The gap between quote and invoice is now permanent and unexplained.
Notice that all four are shape problems, not price problems. Which is good news: shapes can be fixed by agreement before the contract is signed, which is cheaper than fixing trust afterwards. The deeper mechanics of coded lines are covered in kitchen Schedule of Rates codes explained; what follows assumes the codes exist and shows how to run them end to end.
One structure, four documents
Picture one line, CJC250, dry underbench cabinetry, priced per metre, and follow it through the job. On the quote it carries a rate and a measured quantity. On your order it is the same line, same code, same rate, quantity confirmed off the site measure. On the monthly progress claim it is the same line again with a percentage complete against it. On the invoice it is the same line at the claimed percentage. Four documents, one line, no translation anywhere. Reconciliation is subtracting last month's certified figure from this month's claimed one, line by line, and the whole kitchen package ties out in minutes.
The same coded line carried through quote, claim and invoice. When the shapes match, checking is subtraction.
Getting there takes one decision, made early: the sub's quote adopts the head contract's coding. Not a similar breakdown, the same one, codes and units included. On social-housing work that means quoting against the issued Schedule of Rates, which is the whole subject of pricing kitchens to the Kāinga Ora Schedule of Rates. On private multi-unit work with no issued codes, you still ask for unit-rate lines and then hold every document to them; quoting by the metre versus a lump sum covers why the rates matter beyond reconciliation.
| Document | What the line says | What changed |
|---|---|---|
| Quote | CJC250 dry underbench · 2.4 m · rate | Rate and measured quantity set |
| Order | CJC250 dry underbench · 2.4 m confirmed | Quantity locked off the site measure |
| Progress claim | CJC250 · 2.4 m · 60% complete | Only the percentage moves |
| Invoice | CJC250 · 2.4 m · 60% · line value | Value equals the claim, line by line |
Part-complete months without a fight
Kitchens rarely finish on claim-day boundaries. A block is delivered but not installed, benchtops are on but splashbacks are not, and a lump-sum document has no honest way to say so, which is where 'part complete, 70%' guesses come from and where QS scepticism starts. Coded lines solve this without drama: each line claims its own percentage. Carcasses delivered and fixed but tops not templated reads as cabinetry lines at 100 per cent, benchtop line at zero. The claim is precise, the certifier can walk a unit and check it, and next month's claim starts from an agreed baseline instead of a fresh argument.
If the programme splits delivery and installation formally, split the lines the same way, supply and install as separate rates or an agreed split per line, decided at quote stage. What you must not do is invent the split retrospectively, per month, per mood.
The drifts that break it mid-programme
Even a well-shaped paper chain decays if you let it. Three drifts do most of the damage. Descriptions drift when someone retypes lines into their own system, so freeze the wording at order stage and reject documents that rename lines. Bundling drifts in when small lines seem too fiddly to carry, so keep toe-kick, inserts and catches as their own lines even when the values are small, because bundles are where differences hide. And variations drift in silently when changes get agreed on site and absorbed into existing numbers; every change should arrive as a new, dated line priced off the existing rates, which is the discipline at the heart of reducing variations and RFIs on kitchen packages.
Some mismatches are legitimate, and the structure handles those too. A remeasure after the site measure changes a quantity: the line updates, dated, before the next claim. A block sits in a different pricing area: its lines carry that area's rates from the start. Legitimacy is not the issue; visibility is. A legitimate change recorded as a silent edit is indistinguishable from a mistake, and gets treated like one at review.
A dispute is usually two documents that cannot recognise each other.
What to ask your kitchen supplier for before you sign
- A quote itemised against your head contract's codes and units, or against agreed unit-rate lines where no codes exist.
- Confirmation that claims and invoices will carry the same lines, same codes, same descriptions, for the length of the job.
- Per-line percentage claiming for part-complete months, with any supply/install split agreed up front.
- Variations issued as new dated lines priced off the quoted rates, never absorbed into existing numbers.
- One counterparty for supply and install if you can get it, so there is one paper chain instead of two.
That last point matters more than it looks. When cabinetry comes from one company and installation from another, you reconcile two document chains that also have to reconcile with each other, and the gap between trades becomes a gap between invoices. A single supply-and-install contract collapses that into one thread, which is a fair slice of why builders outsource kitchen packages whole rather than assembling them from parts.
Getting month-end down to minutes
The work happens before the contract is signed, which is the part people skip. Get the quote in the claim's shape, freeze the lines at order, hold every claim and invoice to them, and route changes through new dated lines. Do that and the Friday-afternoon standoff from the top of this piece simply never forms: the QS certifies what the paper already proves, and retention release at the end is a lookup, not an archaeology project.
We quote, claim and invoice in the client's coding as standard on programme work out of our East Tāmaki workshop, supply and install on one contract, one paper chain. Send the head contract's kitchen schedule with your quote request and the price comes back within 24 hours, in your codes, with a reference number. Whoever you use, settle the shape of the paper before you settle the price, because the price is argued once and the paper is argued monthly.
Frequently asked questions
Why doesn't my kitchen invoice match the quote?
Usually because the documents are different shapes, not because the money is wrong. A lump-sum quote cannot be checked against a coded claim, renamed lines break the mapping, small items get bundled into sundries, and variations get absorbed without a record. Fix the shape: one set of coded lines carried from quote to order to claim to invoice, with changes as new dated lines.
What should a kitchen progress claim look like?
The same lines as the quote and order, with a percentage complete against each: cabinetry lines, benchtop, sink bench, splashback and small items, each claiming its own progress. Part-complete months read precisely, carcasses at 100 per cent, benchtop at zero, rather than a rounded guess for the block. The certifier can walk a unit and verify it line by line, which is what gets claims certified on time.
How do I reconcile a subcontractor invoice against a coded head contract?
If the sub quoted in the contract's codes, subtract: this month's claimed value minus last month's certified value, line by line, and the invoice should equal the movement. If the sub quoted lump sums, there is no clean method, you are translating, and that is the thing to fix at the next contract. The reconciliation you want is set up at quote stage or not at all.
Can a kitchen supplier invoice against my claim codes?
A supplier set up for programme work can. Send them the head contract's kitchen schedule and ask for the quote itemised against those codes and units, with claims and invoices to follow the same structure. Suppliers who work social-housing and multi-unit packages do this as standard. A supplier who cannot is not disqualified, but you should price the monthly translation work you will be doing for them.
How are part-delivered kitchens claimed?
Per line, per percentage. Delivered-but-not-installed reads as supply percentages on each line with install still to claim, or as agreed delivery milestones if the contract splits supply and install rates. What matters is that the split is agreed at quote stage and applied consistently, so a part month is arithmetic. Invented monthly, part-complete percentages are where QS queries and payment delays start.
Are price differences between quote and invoice ever legitimate?
Yes: a remeasured quantity after site measure, an agreed variation, or a block sitting in a different pricing area. Legitimate changes still need to arrive as visible, dated line updates or new lines priced off existing rates. A fair change recorded as a silent edit looks identical to an error at review, and it will be queried like one. Visibility, not virtue, is what gets certified.
What paperwork should I agree with a kitchen supplier before signing?
Four things: an itemised quote in your codes or agreed unit-rate lines; a commitment that claims and invoices carry identical line structure; per-line percentage claiming with any supply/install split stated; and variations as new dated lines at quoted rates. Put the structure in the order document. Every month after that, reconciliation is checking numbers rather than interpreting prose.