Is a Contractor Required to Credit the Fair Market Value of a Deleted Item, or Only What He Actually Budgeted?

Is a Contractor Required to Credit the Fair Market Value of a Deleted Item, or Only What He Actually Budgeted?

Question
Salam. A person submits a quote for a construction project based on a set of drawings. The drawings include item X. Later the client decides to cancel item X from the scope. He asks for a fair market value for that item. The contractor says he made a mistake and only budgeted a small amount for X. Is the contractor liable to credit a fair market value for X or only what he claims he had budgeted? If the latter, there is practically no way to prove this, does he just swear an oath by Allah?

Answer
Alhamdulillah, wassalatu wassalamu ala rasulillah, wa ala alihi wa sahbihi ajmain.

1. The Shar‘i Framework

In a construction contract, the price submitted by the contractor is treated in Sharia as a unified lump sum (thaman jami‘i). This means the internal breakdown used by the contractor during estimating is not binding on the client, nor does Sharia require the contractor to match market value for every line item.

When an item is removed from the scope, the deduction is tied to the project’s agreed contract price, not an external market valuation, unless such a clause was explicitly written into the contract.

2. What the Contractor Is Actually Liable For

If the contractor says he allocated only a small amount in his budget for item X, and the contract was a lump-sum agreement, then:

He is responsible only for what he actually priced,

Not what the market price would have been,

And not what the client assumes item X should cost.


Sharia does not obligate him to credit a value he never charged.

This avoids imposing unfair loss on the contractor since the contract is not based on item-by-item pricing, but on a single unified price.

3. Does He Need to Swear an Oath?

Islamically, he does not have to swear an oath in this scenario.

Why?

Because the contract price is unified,

And the default assumption is that the contractor’s pricing method is his private right,

And the claim (that he owes a higher deduction) is coming from the client, not the contractor.


Since the client cannot prove a higher specific amount within the contractor’s lump-sum structure, the contractor’s statement is accepted without requiring a formal oath.

However, if he voluntarily chooses to swear for the sake of clearing doubts or maintaining good relations, that is permitted, but it is not required.

4. Relevant Usul Principle

العبرة في العقود بالمقاصد والمعاني لا بالألفاظ والمباني
Contracts are judged by their objectives and meanings, not by external assumptions.

The meaning of a lump-sum contract is that the entire project is one unified price.
Therefore, deductions reflect the contractor’s internal valuation, not imagined line-item values.

Final Ruling

The contractor only needs to credit what he actually budgeted for item X, not the fair market value.
Because the contract was a unified lump sum, he is not required to swear an oath, though he may do so if he chooses.
The client cannot demand more than what was internally allocated since no separate price for item X was contracted.

And Allah knows best.