Construction buyout savings are the difference between what a trade package was carried at in the guaranteed maximum price and what it was actually bought for. On a normal project that difference is several percent of the contract, it appears in the first six months, and the contract decides where it goes in language most owners have not read.
Where the money comes from
A guaranteed maximum price is assembled before the work is bought. Some packages have firm trade prices behind them. Many carry an estimate, an allowance or a budget line.
Over the following months those packages are tendered and awarded, and each award produces a number that is either above or below what was carried. The sum of those differences is the buyout position.
On most projects the early movement is favorable. Estimators carry prudent numbers, the contractor has an incentive to establish a comfortable position early, and the first packages bought are usually the ones with the most competition.
That means there is typically a period, somewhere between month three and month nine, when the project is holding a real and material saving. On a sixty million dollar project it is commonly between one and four million dollars.
What happens next is entirely a question of contract language, and the language sits in four places that are rarely read together.
Owners tend to discover this at the end of the job, when the final accounting produces a number that bears no relationship to the savings they were told about in month seven. The mechanics of how the gap moves are set out in the buyout process and what the gap tells you.
The four clauses that decide where construction buyout savings go
The shared savings clause. The headline provision. It states how any underrun against the guaranteed maximum price is divided at completion, commonly between fifty and a hundred percent to the owner. Owners read this one and stop, which is the mistake.
The contingency clause. This decides whether a buyout saving can be moved into the contractor contingency instead of remaining a saving. Where it can, the saving disappears immediately and quietly, and the project simply has a larger contingency than it started with.
The reallocation provision. This governs whether the contractor may move value between line items in the schedule of values. Where reallocation is unrestricted, an underrun on concrete can be absorbed by an overrun on drywall without anybody ever calling either of them a saving.
The definition of the final cost of the work. The shared savings arithmetic operates on the difference between the guaranteed maximum price and the final cost of the work. Every item that counts as cost of the work reduces the saving, and the definition is longer than owners expect.
The fourth is the one that does the most damage, because it is not written as a savings provision at all.
Why a saving in month six is not a saving at completion
Three mechanisms consume it, and none of them is improper.
First, absorption. An underrun on an early package and an overrun on a later one net to zero if reallocation is permitted, and the owner sees neither.
Second, transfer to contingency. Where the contract allows buyout savings to increase the contingency, the money is still in the project but it is no longer a saving. It will be spent on something, and whatever it is spent on will not be visible as a change.
Third, timing. Shared savings are calculated at completion, after every change, every claim and every contingency drawdown has run through the account. A saving generated in month six sits in the same pool as an overrun generated in month twenty two, and the pool is what gets divided.
The practical result is that on most projects the owner’s share of shared savings at completion is a fraction of the buyout position that existed halfway through, and the difference was never a decision anybody took. The mechanics of the pool are covered in what shrinks the savings pool.
A worked example
Illustrative figures. Not taken from any client project and not a quotation.
A 68 million dollar guaranteed maximum price on a mixed use building, with a shared savings clause at 75 percent to the owner.
By month eight, 61 percent of the work is bought. The buyout position is favorable by $2.9 million: structure, envelope and elevators all came in under the carried figures.
The contract permits the contractor to transfer buyout savings to the contingency with notice, and permits reallocation between line items without owner consent.
By month eleven, $1.4 million has been transferred to contingency. It is spent over the following year on coordination issues, none of which become change orders because the funds were already inside the contract.
Another $900,000 is absorbed by reallocation as later packages come in above their carried figures in a market that has moved.
At completion the underrun available for sharing is $600,000. The owner receives 75 percent, which is $450,000.
The owner was told, accurately, in month eight that the project was running $2.9 million under. The difference of roughly $1.7 million was never reported as a loss because it was never a loss. It was a series of permitted transfers.
What to negotiate, and what it is worth
Four provisions, all of them cheap to agree before signature and impossible to obtain afterwards.
Require owner consent for any transfer from buyout savings to contingency. Not prohibition, consent. The contractor keeps the flexibility and the owner sees the decision.
Require reallocation above a threshold to be notified. A one page monthly reallocation report is not a burden and it makes absorption visible.
Fix an interim savings determination. A calculation at seventy five percent buyout, with a portion of the established saving released or at least locked, converts a completion date argument into a mid project fact. This is the single most valuable of the four and the one most often refused, which tells you what it is worth.
Read the definition of cost of the work and strike what does not belong. Home office overhead, insurance program charges and internal equipment rates are the usual candidates, and each one reduces the saving pool by its full amount.
What the buyout position tells you even when you cannot keep it
Independent of the money, the buyout log is the best forecasting document on the project, and an owner who reads it monthly knows more than one who reads the cost report.
A favorable buyout that is concentrated in two large packages is not the same as one spread across twenty. The first is a single estimator judgment that happened to be prudent. The second is a market position.
A buyout that deteriorates from month nine onward is telling you that the remaining packages were priced in a different market from the one you are now buying in, and that the later trades, which are usually the finishes and the mechanical systems, will come in high.
And a buyout log that shows packages still unbought late in the job is the clearest warning available, because an unbought package is an estimate carrying the risk of whatever the market does next, as set out in counting the unbought packages at signature.
None of that requires the contract to be favorable. It requires the log to be produced monthly, which is a reporting request rather than a commercial one.
What we do
We read the four clauses together rather than separately, because the shared savings percentage means nothing until you know what can be moved out of the pool before it is calculated. Then we say what an interim determination and a consent requirement would be worth on your specific contract. That reading is part of the readiness review. With three weeks or more before signature, the full pre-GMP review reads the price, the schedule, the interfaces and the change exposure together.
Questions people ask
Is a 100 percent owner share always better?
Not necessarily, and a contractor with no share has no incentive to pursue savings once the guarantee is safe. A split that leaves the contractor something to gain often produces a larger pool than a full owner share produces from a smaller one. What matters more is what can leave the pool beforehand.
Can an owner see the trade contracts?
Under an open book arrangement, generally yes, and the right should be explicit at signature rather than assumed. What owners most need is not every contract but the buyout log: package, carried value, awarded value, date and variance. That is one page and it answers the question.
When is the buyout position most informative?
Between sixty and eighty percent bought, usually somewhere between months seven and twelve. Earlier than that the sample is too small and dominated by whichever large package happened to be awarded first. Later than that the remaining packages are too few to change the picture.
This is general information about construction contracts and is not legal advice.