Budgetary Quote vs Firm Quote: What Each One Commits You To

A budgetary quote is a supplier's price for planning: a fair number on limited information that neither side expects to place an order against. A firm quote is an offer you can accept, with a defined scope, price, delivery, terms and validity. Treat the first like the second and your estimate, your schedule or your contract will catch you out.

Why this matters now

Most capital projects collect both kinds of quote, months apart, for the same equipment. Budgetary prices feed the early estimate. Firm quotes arrive when the datasheets are frozen and the project is ready to buy.

The gap between them is often large, and it is usually not the supplier "putting the price up". It is scope becoming real: materials of construction, seals, testing, documentation and delivery terms that were never in the first number. AACE International ties estimate accuracy to how mature the project definition is, from a range as wide as 50% below to 100% above at Class 5 down to roughly 10% to 20% below and 10% to 30% above at Class 3 [1]. In practice, replacing budgetary prices with firm ones on the main equipment is a big part of that move.

Volatile material costs make the distinction sharper. Outokumpu, for example, prices stainless steel as a base price, extras and an alloy surcharge, and usually publishes the surcharge month by month to pass on changes in alloy costs [5]. A price that was right in March may not be right in September.

What each one commits you to

Whether a binding contract exists, and on what terms, depends on what the parties communicated by words or conduct, judged objectively [2]. A label such as budgetary or subject to contract counts, but conduct can override it, as it did in that case. A "budgetary" quote that names a scope, a price, a delivery date and says "valid for 60 days" starts to look like an offer. A "firm" quote that says "subject to final engineering review" starts to look like it is not.

The terms that decide the real price

When a firm quote arrives, these lines matter as much as the headline number:

• Exclusions. Commissioning, site supervision, spares, special tools and documentation are the usual gaps.
• Delivery terms. The Incoterms 2020 rule on the quote sets who pays for and carries the risk of transport [4]. An ex works price and a delivered price are not comparable until freight is added.
• Lead time basis. Weeks from order and weeks from drawing approval are not the same clock, and on engineered items the gap is often several weeks.
• Price adjustment. Check for alloy surcharge clauses and escalation formulae, and what date they are calculated on.
• Validity. Note whether price, lead time and surcharge each have their own validity. They often do.

Whose terms win

When your purchase order says one thing and the supplier's quote or acknowledgement says another, English courts usually look at the sequence of offer, counter offer and acceptance. In one Court of Appeal case, a supplier's acknowledgement that was "subject to" its own terms counted as a counter offer, and the buyer accepted it by going ahead with the deal, so the supplier's terms applied [3]. The practical lesson for both sides: read the acknowledgement, and reject conflicting terms in writing before work starts.

This is general information, not legal advice. For anything with real money at stake, ask your legal team.

Practical example

In March, a project team asks for budget prices on two process pumps, P101A/B, for a feasibility estimate. In September, with the datasheet frozen, the same supplier sends a firm quote.

The firm price is 31% higher, and every pound of the difference is scope the budget never contained. The mistake is not the budget quote. The mistake is carrying £36,500 into a Class 3 estimate as if it were firm.

Label every price by what it is

The simplest fix is discipline: every price in an estimate carries its basis, its date and its source, and budget numbers are replaced by firm ones before the estimate is used to approve spend.

That is how ChemCapital's Project Costing works. Each line is marked as a firm quotation, a budgetary quote, a historical quote adjusted for date or an indicative figure, so anyone reading the total can see what it rests on. When it is time to go firm, a structured RFQ asks every supplier for the same scope, exclusions, delivery and validity, so the answers can be compared on one basis. For the wider picture of estimate maturity, see our guide to AACE estimate classes.

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