Measurement, Abstract & Invoice – Complete Billing Cycle
Master the art of construction billing from site measurement to final payment
The journey from work executed on site to getting paid is a three-step process: Measurement → Abstract → Invoice. Every billing engineer must master this cycle to ensure accurate, timely payments and maintain healthy cash flow. This guide breaks down each step with formats, examples, and best practices.
📚 Table of Contents
🔄 The Billing Cycle – From Site to Payment
1. Measurement
Record actual work done in Measurement Book (MB) with sketches
2. Abstract
Calculate amount using quantities × rates, add taxes
3. Invoice
Raise RA bill, apply deductions, claim payment
📋 Measurement Book (MB) – The Foundation of Billing
What is Measurement Book?
The Measurement Book (MB) is the primary record of all work executed on site. Every item of work, whether in the contract or extra, must be entered in the MB with detailed dimensions and sketches. It is signed by both contractor and engineer.
MB Format & Columns
| Page No. | Item Ref. | Description | L (m) | B (m) | D/H (m) | Qty | Unit | Remarks |
|---|---|---|---|---|---|---|---|---|
| 1 | 2.1 | Excavation for footing F1 at grid A-2 | 1.5 | 1.5 | 1.2 | 2.70 | m³ | Hard soil |
| 1 | 5.4 | RCC M20 for column C1 at B-3 | 0.3 | 0.4 | 3.0 | 0.36 | m³ | Footing to plinth |
MB Best Practices
- Joint Measurement: Always measure with the contractor present
- Clear Sketches: Draw rough sketches for complex items
- Daily Entries: Record work daily – don’t rely on memory
- Signatures: Get signatures on every page, not just at the end
- Corrections: Never erase – strike through and initial
🧮 Abstract of Cost – Calculating the Amount
What is Abstract of Cost?
The Abstract of Cost is a summary sheet that consolidates MB quantities and calculates the amount payable. It lists each work item, quantity, rate, and amount, plus applicable taxes and deductions.
Abstract Format
| Item No. | Description | Unit | Qty | Rate (₹) | Amount (₹) |
|---|---|---|---|---|---|
| 2.1 | Earthwork excavation | m³ | 2.70 | 385 | 1,040 |
| 5.4 | RCC M20 | m³ | 0.36 | 6,950 | 2,502 |
| Gross Total | 3,542 | ||||
| Add GST @ 5% | 177 | ||||
| Net Payable | 3,719 | ||||
Abstract Preparation Steps
- Collect all MB entries for the billing period
- Group items by work type and item code
- Enter quantities in abstract (total from MB)
- Apply rates from contract / SOR / approved rate analysis
- Calculate amounts and add taxes (GST, labour cess)
- Apply deductions (advance recovery, TDS, retention)
🧾 Invoice / RA Bill – The Payment Request
What is an RA Bill?
Running Account (RA) Bill is a periodic (usually monthly) invoice submitted by the contractor for work done during that period. It is based on the abstract of cost and is certified by the engineer.
RA Bill Format
| RA Bill No. 3 – Period: 01-03-2026 to 31-03-2026 | |
|---|---|
| Gross value of work done (this period) | 5,25,000 |
| Add: GST @ 5% | 26,250 |
| Total this bill | 5,51,250 |
| Less: Retention @ 5% | -27,563 |
| Less: Advance recovery | -50,000 |
| Less: TDS @ 2% | -11,025 |
| Net Payable | 4,62,662 |
Types of Bills
- RA Bills: Interim monthly bills
- Final Bill: Submitted after completion of all work
- Escalation Bill: For price variation claims
- Extra Item Bill: For work not in original BOQ
📋 Step-by-Step Billing Flow (With Example)
📊 Worked Examples
Example 1: First RA Bill (With Advance)
Scenario: Contractor received ₹5,00,000 mobilization advance. First month work value ₹8,00,000. Retention 5%, TDS 2%, GST 5%.
| Gross work done | 8,00,000 |
| Add GST @5% | 40,000 |
| Total | 8,40,000 |
| Less: Retention @5% (on 8,00,000) | -40,000 |
| Less: Advance recovery @10% of bill | -80,000 |
| Less: TDS @2% (on 8,40,000) | -16,800 |
| Net Payable | 7,03,200 |
Example 2: Running Bill with Extra Item
Scenario: Work done includes BOQ items ₹6,00,000 and extra item (rock excavation) ₹1,50,000 (approved).
| BOQ items | 6,00,000 |
| Extra item (rock excavation) | 1,50,000 |
| Gross total | 7,50,000 |
| Add GST @5% | 37,500 |
| Total | 7,87,500 |
| Less: Retention @5% | -37,500 |
| Less: TDS @2% | -15,750 |
| Net Payable | 7,34,250 |
💰 Common Deductions in Contractor Bills
| Deduction | Rate / Basis | Remarks |
|---|---|---|
| Retention Money | 5-10% of bill amount | Released after DLP |
| TDS (194C) | 1% (Individual) / 2% (Others) | On gross + GST |
| Advance Recovery | As per agreement (10-20% of bill) | Till advance fully recovered |
| Labour Cess | 1% of total cost | State specific |
| Royalty / VAT | On materials (sand, stone) | Deducted at source |
| Debit Notes | As raised (penalties, shortfall) | With supporting documents |
🎯 Final Bill & No-Dues Certificate
Final Bill Components
- All work done (including last RA bill)
- Extra items and variations (with approval)
- Price escalation (if applicable)
- Less: all advances recovered
- Less: retention money (50% released now, 50% after DLP)
- Less: TDS, GST, other deductions
- Interest / claims (if any)
No-Dues Certificate Format
I, [Contractor Name], hereby certify that all dues from the client for the project [Project Name] have been received in full and no further claims remain outstanding.
Signature: ___________________
Date: ___________________
📥 Download Billing Templates
🎯 Conclusion
The Measurement → Abstract → Invoice cycle is the lifeline of construction billing. Mastering each step ensures accurate payments, healthy cash flow, and dispute-free projects. Use the templates provided, follow the examples, and you’ll be a billing expert in no time!
Er. Kuljit Singh
Civil Engineer | Quantity Surveyor | Founder of Arshavtar.in – helping engineers master construction billing and contracts.