The allowance line: what it is, and what it quietly defers to later
In short
An allowance is a sum carried in the contract price for scope that is settled in intent but not in selection: the lobby is being tiled, nobody has chosen the tile. It is a deferred decision with an owner, a deadline and a settlement rule attached, which is why it belongs in a tracked register rather than as one line inside a spreadsheet total.
Key takeaways
- An allowance defers a selection, not a risk. Contingency defers a risk and has no defined scope behind it.
- The inclusion boundary decides the reconciliation: supply-only and installed allowances settle very differently.
- Every allowance needs a selection deadline derived from lead time, because a late selection costs schedule before it costs money.
- The markup treatment on the difference has to be agreed at bid; arguing it at reconciliation is arguing from a weak position.
- An allowance held as a spreadsheet cell cannot answer which allowances are still open, which is the only question that matters mid-job.
An allowance is a sum carried in the contract price for scope that is settled in intent but not in selection. Everyone agrees the lobby floor is being tiled and that there are 240 m² of it; nobody has chosen the tile. The number in the estimate stands in for that choice until it is made, and the difference between the number and the real cost is settled later under a rule that should have been written at bid.
That makes an allowance a deferred decision with a date attached, not a placeholder. Almost every problem an allowance causes between award and month 6 comes from treating it as the second thing.
Allowance, contingency, provisional sum, alternate
Four instruments defer four different things, and they are routinely used as synonyms in conversation. Only 2 of the 4 create a reconciliation duty that outlives award. They settle differently, so the distinction is worth 5 minutes at bid.
| Instrument | What is undecided | Who decides | How it settles |
|---|---|---|---|
| Allowance | Which product or finish, within an agreed intent and quantity | The owner, usually on the architect's recommendation | Contract sum adjusted by the difference against the allowance, on an agreed markup rule |
| Contingency | Whether anything unforeseen happens at all | Whoever holds it — owner or contractor, and this must be named | Drawn down against events; the fate of any unspent balance should be agreed at signing |
| Provisional sum | Whether the work is executed, and in what quantity | The contract administrator, by instruction | Omitted, or valued and instructed as the work is directed |
| Alternate | Which of two fully priced scopes the owner buys | The owner, at or before award | Selected at award, after which it is simply base scope |
The alternate is the useful contrast. An alternate is priced properly on both branches before anybody decides, which is why it belongs in the estimate as a parallel scope branch rather than a delta typed at the bottom. An allowance is the opposite trade: one number now, the real pricing later. Choosing an allowance where an alternate would do is choosing to argue about money during construction instead of during preconstruction.
What the line hides
Three things sit behind an allowance number, and a typical estimate records none of them.
- The inclusion boundary. Under the AIA A201 general conditions, section 3.8 puts the cost of materials and equipment delivered to the site, plus required taxes, inside the allowance — while unloading and handling, labour, installation, overhead and profit sit in the contract sum outside it. So "a tile allowance" and "an installed tile allowance" are different contracts, and only one of them absorbs a labour-intensive selection.
- The selection deadline. The date is not "before we need it". It is the on-site date minus delivery lead time minus submittal and approval time, and for anything imported or made to order it lands earlier than anybody expects.
- The consequence of missing that date, which is schedule rather than money. A late selection is paid for in resequencing and acceleration, and neither shows up anywhere near the allowance line.
The allowance as a record
| Field | Value |
|---|---|
| Reference and scope | ALW-04 · ceramic floor tile, level 1 lobby, 240 m² |
| Basis of the number | 240 m² from the takeoff, at an allowance rate stated in the bid form |
| Included | Supply, delivery to site and applicable taxes |
| Excluded | Setting materials, labour, waste, trims, sealing and protection |
| Selector | Owner, on the architect's recommendation |
| Selection due | 10-week lead time plus 3 weeks for submittal and approval, counted back from the finishes start |
| Settlement | Contract sum adjusted by the difference in supply cost only, no markup on the delta |
| State and owner | Open · project manager |
The quantity basis row deserves a second look, because it inherits other people's errors. An allowance sized at 240 m² from a takeoff carries whatever that takeoff got wrong, and a 3 percent scale problem of the kind described in lengths that are all wrong by the same percentage sizes the allowance wrongly and stays invisible until the material is ordered. The same applies to boundary disagreements between estimators, which is why two people take off one set and return different quantities.
An allowance is a promise that somebody will decide something. If no name and no date are attached to it, it is only a promise that somebody will argue.
Setting one at bid, in six steps
- Write the intent and the quantity basis in the same line as the number, so nobody later reads the figure as a lump sum for an undefined area.
- State the inclusion boundary explicitly, including taxes, delivery and whether installation is inside or outside.
- Derive the selection deadline from lead time rather than from the schedule's finishes date, and put the derivation in the record.
- Name the selector as a role, not a person, because people leave and roles do not.
- Agree the settlement mechanism and the markup treatment on the difference before the bid goes out. This is a 5-minute conversation at bid and a dispute at reconciliation.
- Register it as a tracked item with a state — open, selected, reconciled — that a project manager can filter on.
There is a general lesson worth naming here, because it repeats across construction paperwork: the summary document and the operative document are different things, and only one of them decides anything. An allowance line in a bid form is a summary; the record behind it, with its boundary and settlement rule, is what will actually be argued from. The same asymmetry is why an endorsement rather than a certificate is what proves insurance cover, and it is the reason we tend to build this kind of tracking as internal tools and ops systems rather than leaving it in a workbook. The rest of the silo sits under preconstruction, takeoff and estimating, inside our broader construction and contracting work.
Frequently asked questions
Short answers to the follow-ups this page tends to raise.
What is an allowance in a construction estimate?
It is a stated sum carried in the price for scope whose intent is agreed but whose selection is not yet made — a finish, a fixture, a piece of equipment. The contract sum is later adjusted by the difference between the allowance and the actual cost of what gets chosen. Its defining feature is that the scope exists and is quantified; only the specific product is open.
What is the difference between an allowance and a contingency?
An allowance covers scope that is definitely happening with a selection still open; a contingency covers events that may not happen at all. That difference decides who controls the money and how it is released: allowances reconcile against a specific selection, while contingency is drawn down against occurrences and needs a written rule about who keeps the unspent balance.
Who is responsible if an allowance turns out to be too low?
Ordinarily the owner pays the difference, because the allowance was their number for their deferred decision — but that holds only if the contractor's scope boundary was stated and the selection deadline was met. Where the contractor set the allowance without qualifying it, or delayed the selection process, the position weakens considerably. This is exactly why the basis and the boundary belong in the record at bid rather than in a recollection later.
How many allowances is too many in one estimate?
Watch the share of the contract sum rather than the count. A handful of allowances covering Division 09 finishes and specialty equipment is normal; a bid where 10 or 15 percent of the total sits in unpriced allowances is a bid where nobody has really priced the job, and the low number that wins it gets recovered later through reconciliations. If the design is that unresolved, an early works package or a separately priced alternate is the more honest instrument.
- allowances
- estimating
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