Cost Accounting · Contract Costing

Escalation Clause, Cost Plus Contracts and Extra Work

Updated 10 October 2026 · Fact-checked

An escalation clause lets the contract price rise or fall when input costs move beyond agreed limits. A cost-plus contract fixes the price as actual cost plus an agreed profit. Extra work ordered by the customer adds to the contract price. To solve, compute the adjustment, revise the contract price, then recompute profit.

Understand Escalation Clause, Cost Plus Contracts and Extra Work

A contract usually runs for months or years. In that time, prices of material and wages can change. If the price is fixed at the start, the contractor carries the whole risk. Three features of contract pricing deal with this and with changes in scope.

An escalation clause says the contract price will be increased if the cost of specified inputs (material, labour, sometimes overheads) rises beyond a stated base or limit. A de-escalation clause works the other way: the price is reduced if costs fall. The clause is meant for changes outside the contractor's control. It usually names the inputs, the base rates and any tolerance. Read it carefully, because the answer depends on its exact words.

A cost-plus contract has no fixed price. The contractee pays the actual cost of the contract plus an agreed profit. The profit may be a fixed fee or a percentage, either on cost or on price. This suits work where the final cost cannot be estimated at the start. The contractor's risk is low, so the contractee usually controls and audits costs.

Extra work is work outside the original scope, ordered by the contractee. The price for it is agreed separately, or is cost plus a margin. If it is small, it is added to the contract price and its costs go into the same contract account. If it is large or distinct, treat it as a separate contract with its own account. Claims are amounts the contractor asks for beyond the agreed price, for example for delays caused by the contractee. Include a claim in contract value only to the extent it is probable that it will be accepted and the amount can be measured reliably. Otherwise ignore it.

In every case the idea is the same: find the revised contract price first, then work out profit, work certified and notional profit on that revised price.

Key rules to remember

Escalation amount (rate-based clause): Escalation = (Actual rate − Base rate − Tolerance allowed, if any) × Quantity used; Apply to each input named in the clause. Use only the excess over the base or tolerance if the clause says so. If the actual rate is below base, the result is de-escalation.
Revised contract price: Revised price = Original price + Escalation − De-escalation + Price of extra work + Accepted claims; Use this revised price for all profit and percentage-of-completion working.
Cost-plus contract price (profit on cost): Price = Total cost + (Profit % × Total cost); Total cost includes extra work cost and the overheads allowed by the contract.
Cost-plus contract price (profit on price): Price = Total cost ÷ (1 − Profit % on price); Use when profit is stated as a percentage of contract price. Profit on price of 20% equals 25% on cost.
Profit on contract: Profit = Revised contract price − Total cost of contract; For incomplete contracts, apply the usual notional profit and transfer rules to the revised price.

How to solve Escalation Clause, Cost Plus Contracts and Extra Work questions

Use this order for any question on escalation, cost-plus or extra work.

1Read the clause or agreement and note the inputs covered, base rates, tolerance and whether it is escalation, de-escalation or cost-plus.
2Separate the original-scope costs from extra-work costs. Decide if extra work is part of the same contract or a separate one.
3For each covered input, find the quantity actually used and compare actual rate with base rate (after any tolerance).
4Compute escalation or de-escalation for each input and total it.
5Build the revised contract price: original price plus escalation, less de-escalation, plus extra work price, plus accepted claims.
6For cost-plus, total all allowed costs and add the agreed profit on cost or on price.
7Prepare the contract account or profit working on the revised price, and state any assumption you made in one line.

Quickest way: One-line revised price method

When to use it: Use when the question asks only for the revised price, escalation amount or final profit and not a full contract account.

Write each covered input as a row: quantity, base rate, actual rate, tolerance.
Multiply the rate difference after tolerance by quantity and total the column.
Add this total and the extra work price to the original price in one line.
Subtract total cost to get profit, or add profit percentage to cost for a cost-plus contract.
Check the sign: a rise in cost over base increases price, a fall reduces it.

Common mistakes in Escalation Clause, Cost Plus Contracts and Extra Work

Escalating on the whole actual cost instead of the excess over the base
Students see 'cost rise' and apply it to total cost.
Fix: Compute only the rate difference after tolerance, multiplied by the quantity used.
Ignoring the tolerance or limit given in the clause
The tolerance sits in a sentence at the end of the question.
Fix: Underline the limit first. If escalation is payable only beyond 5%, deduct 5% of the base rate before multiplying.
Calculating profit on the original price after escalation
The first price in the question feels final.
Fix: Always revise the price first. Profit, work certified and percentage of completion use the revised price.
Confusing profit on cost with profit on price in cost-plus contracts
Both are written as a percentage.
Fix: Profit on cost: multiply cost by (1 + %). Profit on price: divide cost by (1 − %).
Mixing extra work costs into the contract without adding its price
Students record the cost but forget the revenue side.
Fix: If extra work is part of the contract, add both its cost and its agreed price. If separate, prepare a separate account.
Including unapproved claims in contract value
A claim figure is given, so it is added by habit.
Fix: Include a claim only if the question says it is accepted or probable of acceptance. Otherwise leave it out and note this.

Worked examples

Example 1

Surya Constructions has a contract for ₹50,00,000. The contract has an escalation clause: the price is increased for any rise in material and labour rates above 5% of the base rates. Base rates: material ₹100 per unit, labour ₹50 per hour. Actual: material used 20,000 units at ₹112, labour 40,000 hours at ₹54. Total cost of the contract on completion is ₹46,00,000. Find the escalation, the revised contract price and the profit.

Show the solution

Material: 5% of ₹100 = ₹5 tolerance. Excess rise = (₹112 − ₹100) − ₹5 = ₹7 per unit.
Material escalation = ₹7 × 20,000 = ₹1,40,000.
Labour: 5% of ₹50 = ₹2.50 tolerance. Excess rise = (₹54 − ₹50) − ₹2.50 = ₹1.50 per hour.
Labour escalation = ₹1.50 × 40,000 = ₹60,000.
Total escalation = ₹1,40,000 + ₹60,000 = ₹2,00,000.
Revised contract price = ₹50,00,000 + ₹2,00,000 = ₹52,00,000.
Profit = ₹52,00,000 − ₹46,00,000 = ₹6,00,000.

Answer: Escalation ₹2,00,000; revised contract price ₹52,00,000; profit ₹6,00,000 (assuming escalation is payable only on the excess over 5% of base rates).

Example 2

Kaveri Infra undertakes a cost-plus contract at cost plus 15% profit on cost. Costs of the original work: materials ₹8,00,000, wages ₹5,00,000, direct expenses ₹1,00,000. Overheads are charged at 20% of wages. At the contractee's request, extra work was done: materials ₹90,000 and wages ₹50,000, with overheads also at 20% of wages. Both works form one contract. Find the total cost, profit and contract price.

Show the solution

Original overheads = 20% × ₹5,00,000 = ₹1,00,000.
Original cost = ₹8,00,000 + ₹5,00,000 + ₹1,00,000 + ₹1,00,000 = ₹15,00,000.
Extra work overheads = 20% × ₹50,000 = ₹10,000.
Extra work cost = ₹90,000 + ₹50,000 + ₹10,000 = ₹1,50,000.
Total cost = ₹15,00,000 + ₹1,50,000 = ₹16,50,000.
Profit = 15% × ₹16,50,000 = ₹2,47,500.
Contract price = ₹16,50,000 + ₹2,47,500 = ₹18,97,500.

Answer: Total cost ₹16,50,000; profit ₹2,47,500; contract price ₹18,97,500.

Exam tips

Underline the base rate, tolerance and covered inputs in the question before you calculate anything.
State your assumption about the clause in one line, for example 'escalation on excess over 5% only'. This protects step marks if the examiner reads it differently.
Show a small table for input, quantity, rate difference and escalation. It is quick and easy to mark.
In MCQs, check whether the answer asked is escalation, revised price or profit. The options often include the other two.
Treat extra work as a separate contract only when the question says it is distinct or separately priced.

Practice questions from Contract Costing

Escalation Clause, Cost Plus Contracts and Extra Work: frequently asked questions

What is an escalation clause in contract costing?

It is a term in the contract that lets the price be increased when the cost of specified inputs rises beyond a base or limit. It protects the contractor from cost changes outside its control. A de-escalation clause reduces the price when costs fall.

How is a cost-plus contract different from a fixed-price contract?

In a fixed-price contract the price is agreed in advance, so the contractor bears cost changes. In a cost-plus contract the contractee pays actual cost plus an agreed profit. The profit may be a percentage of cost or a fixed fee.

How do you treat extra work in a contract account?

If the extra work is small, add its price to the contract price and charge its costs to the same contract account. If it is substantial or distinct, treat it as a separate contract with its own account and profit working.

Should claims be added to the contract price?

Only when it is probable that the contractee will accept the claim and the amount can be measured reliably. Unaccepted or uncertain claims are left out of contract value.