Supply arrangement vs standing offer

Both are "vehicles": agreements set up in advance so the government can buy repeatedly without running a full open tender each time. They sound interchangeable, but the mechanics — and your odds of actually winning work through them — differ in one crucial way.

Standing offer: prices are locked, the call-up is the contract

A standing offer is a binding offer from you to supply goods or services at pre-negotiated prices and terms. It isn't a contract by itself — but when the buyer issues a call-up against it and you accept, a contract exists on those pre-set terms. No further pricing, no further competition: the work goes to standing offer holders in whatever order the instrument's priority rules define (often lowest price, rotation, or best value among qualified holders).

Supply arrangement: terms are set, the competition happens at time of need

A supply arrangement establishes your qualification, terms and conditions — but usually not final pricing. When a requirement arises, the buyer runs a compressed competition among SA holders: they solicit bids from qualified suppliers, often three or more, and award to the best response. Winning the SA is therefore a seat at the table, not the meal.

What this means for bidders

Effort versus payoff

A standing offer response demands tight, defensible pricing up front, but every call-up is yours to win on process rather than price re-fighting. A supply arrangement response is cheaper to prepare (no binding price commitment), but you'll re-compete for each requirement — a permanent price desk and fast turnaround matter more than the original bid.

Watch the expiry

Both instruments have set periods (often one to three years) and refresh windows. Missing a refresh or invoice-compliance obligation can suspend your eligibility even while the instrument technically exists.

Related definitions

Standing offer · Pre-qualified supplier list · Piggybacking