Cost Accounting · Contract Costing
Work Certified, Work Uncertified and Retention Money
Updated 10 October 2026 · Fact-checked
Work certified is work approved by the contractee's architect, valued at contract price. Work uncertified is work done but not yet approved, valued at cost. Retention money is the part of certified value the contractee holds back. Cash received equals work certified minus retention, and the contractee's account balance equals the retention.
Understand Work Certified, Work Uncertified and Retention Money
In a long contract, the contractor does not wait until the end to be paid. The contractee's architect or engineer inspects the work at stages and issues a certificate. The value of the work approved in that certificate is work certified. It is stated at contract price, so it includes the profit element.
Some work is finished after the last inspection and is not yet approved. This is work uncertified. Because nobody has approved it, you value it at cost, with no profit added. Both amounts are credited to the contract account, as they show the value of work done.
The contractee does not pay the full certified value at once. It holds back a percentage as retention money. This protects the contractee if defects appear. The retention is released after the contract is completed or after the defect-liability period. So cash received is less than work certified.
The contractee's account tracks the dealings. You debit it with work certified and credit it with cash received. The balance is the retention money still due from the contractee. It is a receivable, not a loss.
Key rules to remember
- Cash received
- Cash received = Work certified − Retention money
- If retention is a percentage of certified value: Cash received = Work certified × (100 − retention %) ÷ 100.
- Retention money
- Retention money = Work certified × retention %
- Apply the percentage to work certified, not to cost or to the total contract price, unless the question says so.
- Contractee's account balance
- Balance = Work certified − Cash received
- This equals the retention money due from the contractee.
- Valuation rule
- Work certified at contract price; work uncertified at cost
- No profit is included in work uncertified.
- Credit side of contract account
- Work certified + Work uncertified + Closing materials at site + Plant at written-down value
- Notional profit = total credits − total debits.
How to solve Work Certified, Work Uncertified and Retention Money questions
Use this order for any question on work certified, uncertified and retention. It keeps cost, value and cash apart.
- 1Read the data and list three separate figures: cost incurred, work certified and cash received. Do not mix them.
- 2Note the retention percentage and what it applies to. Normally it applies to work certified.
- 3Compute retention money = work certified × retention %. Then cash received = work certified − retention, unless the question gives cash directly.
- 4Value work uncertified at cost. Add no profit to it.
- 5Prepare the contract account. Debit all costs. Credit work certified, work uncertified, closing materials and plant at written-down value.
- 6Find the balancing figure, which is the notional profit or loss.
- 7Prepare the contractee's account: debit work certified, credit cash received, and show the balance as retention due.
- 8Check that the contractee's balance equals the retention money, then state the answer clearly.
Quickest way: Three-line shortcut for certified, cash and retention
When to use it: Use it when the question asks only for cash received, retention or the contractee's balance, and no full contract account is needed.
- Write work certified.
- Multiply by retention % to get retention. Subtract it to get cash received.
- Contractee's balance = retention. Put work uncertified aside, because it never enters the contractee's account.
Common mistakes in Work Certified, Work Uncertified and Retention Money
Valuing work uncertified at contract price
Students treat it like work certified and add profit.
Fix: Uncertified work is always at cost. Only certified work is at contract price.
Calculating retention on cost or on the total contract price
The question mentions several amounts and students pick the wrong one.
Fix: Unless stated otherwise, retention is a percentage of work certified.
Treating cash received as work certified
Both relate to the contractee, so students treat cash received as if it were the value of work certified.
Fix: Cash received is certified value less retention. It is not credited to the contract account. It goes to the contractee's account.
Leaving work uncertified out of the contract account
Students focus on certified work, which is the visible figure.
Fix: Credit both certified and uncertified work. Missing uncertified work understates profit.
Treating retention as a loss or an expense
The money has not been received, so it looks lost.
Fix: Retention is a receivable. It is part of work certified and is collected later.
Forgetting plant and closing materials on the credit side
The question focuses on certification, so students stop early.
Fix: Always scan the data for plant at site and materials in hand at year end before finding the balancing figure.
Worked examples
Example 1
Navkar Constructions is building a bridge for a contract price of ₹50,00,000. Up to 31 March, work certified is ₹30,00,000 and work uncertified, at cost, is ₹2,00,000. The contractee retains 10% of work certified. Find the retention money, the cash received, the balance in the contractee's account, and the value credited to the contract account for work done.
Show the solution
- Retention money = ₹30,00,000 × 10% = ₹3,00,000.
- Cash received = ₹30,00,000 − ₹3,00,000 = ₹27,00,000.
- Contractee's account: debit work certified ₹30,00,000; credit cash received ₹27,00,000.
- Balance = ₹30,00,000 − ₹27,00,000 = ₹3,00,000, which is the retention due from the contractee.
- Credit to the contract account for work done = work certified ₹30,00,000 + work uncertified ₹2,00,000 = ₹32,00,000.
Answer: Retention ₹3,00,000; cash received ₹27,00,000; contractee's balance ₹3,00,000 (debit); work credited to the contract account ₹32,00,000.
Example 2
Shreeji Builders has a contract. For the year it incurred: materials issued ₹6,00,000; wages ₹4,00,000; direct expenses ₹50,000; plant at cost ₹2,00,000. At year end: materials at site ₹40,000; plant at written-down value ₹1,80,000; work certified ₹12,00,000; work uncertified at cost ₹80,000. Retention is 20% of work certified. Find the notional profit, cash received and contractee's balance.
Show the solution
- Debit side total = 6,00,000 + 4,00,000 + 50,000 + 2,00,000 = ₹12,50,000.
- Credit side total = work certified 12,00,000 + work uncertified 80,000 + materials at site 40,000 + plant at WDV 1,80,000 = ₹14,00,000.
- Notional profit = 14,00,000 − 12,50,000 = ₹1,50,000.
- Retention = ₹12,00,000 × 20% = ₹2,40,000.
- Cash received = 12,00,000 − 2,40,000 = ₹9,60,000.
- Contractee's balance = 12,00,000 − 9,60,000 = ₹2,40,000, equal to the retention.
Answer: Notional profit ₹1,50,000; cash received ₹9,60,000; contractee's balance ₹2,40,000 (debit).
Exam tips
- In MCQs, check the valuation basis first. A 2-mark option often differs only by using contract price instead of cost for uncertified work.
- Write the contractee's account in full in written answers. Showing work certified, cash received and the balance earns step marks.
- Underline what the retention percentage applies to before you calculate.
- Show a clear contract account with all credits listed separately. Partial marks depend on each item being visible.
- Cross-check that the contractee's balance equals the retention. This catches slips quickly.
Practice questions from Contract Costing
- In contract costing, 'work certified' means:
- Plant costing Rs 8,00,000 was purchased for a contract and used for the whole year. At the year end its value after depreciation is Rs 6,80,…
- Materials costing Rs 2,00,000 were sent to a contract site and at the year end Rs 15,000 of materials were lost by theft and Rs 25,000 of ma…
- In contract costing, each contract is treated as a separate cost unit mainly because:
- A contract of ₹80,00,000 is 50% complete. Cost to date is ₹36,00,000, work certified is ₹40,00,000 and work uncertified is carried at cost o…
Work Certified, Work Uncertified and Retention Money: frequently asked questions
What is the difference between work certified and work uncertified?
Work certified has been inspected and approved by the contractee's architect or engineer, and is valued at contract price. Work uncertified is done but not yet approved, and is valued at cost. Certified work includes profit, uncertified work does not.
What is retention money in contract costing?
It is a percentage of work certified that the contractee holds back as security for defects or incomplete work. It is paid to the contractor later, once the contract or defect period ends. Until then it is a receivable.
Is cash received the same as work certified?
No. Cash received is work certified less retention money. The difference stays as the balance in the contractee's account.
Does work uncertified appear in the contractee's account?
No. The contractee has not certified it, so there is nothing to bill. It appears only on the credit side of the contract account, at cost.