What is RA Bill in Construction Management? Complete Guide for Contractors

What is RA Bill in Construction Management?

In construction projects, payments are usually not made only at the end of the project. Since construction work continues for months or years, contractors raise bills at different stages based on the work completed.

This bill is commonly called an RA Bill, or Running Account Bill.

RA Bill is one of the most important parts of construction billing because it connects actual site work, measurement, certification, deductions, taxes, and payment.

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What is RA Bill?

RA Bill stands for Running Account Bill.

It is a progressive bill raised by a contractor or subcontractor for the work completed during a specific period.

For example, if a contractor is building a residential tower, they may raise RA bills every month based on the quantity of work completed during that month.

Instead of waiting for the full project to finish, the contractor submits bills in stages.

Example:

RA Bill	Period	Work Billed
RA Bill 1	April 2026	Foundation work
RA Bill 2	May 2026	Column and slab work
RA Bill 3	June 2026	Brickwork and plaster
RA Bill 4	July 2026	Flooring and finishing

This helps contractors maintain cash flow and helps clients pay only for certified work.

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Why RA Bill is Important in Construction

Construction projects involve large costs for material, labour, machinery, subcontractors, and site expenses. If contractors do not receive regular payments, the project may slow down due to cash flow issues.

RA billing helps in:

• Tracking work completed

• Certifying actual quantities

• Managing contractor payments

• Controlling project cash flow

• Linking billing with BOQ

• Avoiding overbilling

• Tracking retention and deductions

• Monitoring project profitability

For both client and contractor, RA billing gives a structured way to manage payments during project execution.

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How RA Billing Works

RA billing usually follows this process:

BOQ → Work Execution → Measurement Entry → Quantity Certification → RA Bill Preparation → Deductions → Tax Calculation → Approval → Payment

Let us understand this step by step.

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1. BOQ is Created

The project starts with a BOQ, or Bill of Quantities. BOQ contains all work items, quantities, rates, and total value.

Example:

BOQ Item	Unit	BOQ Qty	Rate	Amount
RCC Work	CUM	500	₹6,500	₹32,50,000
Steel Work	KG	80,000	₹62	₹49,60,000
Brick Work	SQM	2,000	₹850	₹17,00,000

RA bill is usually prepared against these BOQ items.

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2. Work is Completed at Site

After work is completed at site, the site engineer or project team records how much quantity has been executed.

Example:

In May, the contractor completed:

Work Item	Quantity Completed
RCC Work	80 CUM
Steel Work	12,000 KG
Brick Work	300 SQM

This quantity is not directly billed. It first needs to be measured and certified.

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3. Measurement Book is Prepared

The Measurement Book, also called MB, records actual site measurements.

It may include:

• BOQ item

• Location

• Floor

• Block

• Length

• Width

• Height

• Number of units

• Current measurement

• Previous measurement

• Cumulative measurement

• Engineer remarks

Example:

BOQ Item	Location	Previous Qty	Current Qty	Cumulative Qty
RCC Work	Tower A - 2nd Floor	100 CUM	80 CUM	180 CUM
Steel Work	Tower A - 2nd Floor	20,000 KG	12,000 KG	32,000 KG
Brick Work	Tower A - 1st Floor	500 SQM	300 SQM	800 SQM

The Measurement Book is the base document for RA billing.

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4. Quantity is Certified

The project engineer, consultant, or client representative verifies the measurement.

There can be three quantities:

Quantity Type	Meaning
Claimed Quantity	Quantity submitted by contractor
Checked Quantity	Quantity verified by engineer
Certified Quantity	Final approved quantity for billing

Example:

BOQ Item	Claimed Qty	Certified Qty	Difference
RCC Work	85 CUM	80 CUM	-5 CUM
Steel Work	12,500 KG	12,000 KG	-500 KG
Brick Work	300 SQM	300 SQM	0

RA bill should be generated only on certified quantity.

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5. RA Bill is Prepared

Once quantities are certified, the RA bill is prepared using BOQ rates.

Sample RA Bill:

BOQ Item	Unit	Previous Qty	Current Qty	Cumulative Qty	Rate	Current Amount
RCC Work	CUM	100	80	180	₹6,500	₹5,20,000
Steel Work	KG	20,000	12,000	32,000	₹62	₹7,44,000
Brick Work	SQM	500	300	800	₹850	₹2,55,000

Current Bill Amount: ₹15,19,000

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6. Deductions are Applied

Construction RA bills usually include different deductions.

Common deductions include:

• Retention amount

• Mobilization advance recovery

• Material advance recovery

• Debit note

• Penalty

• TDS

• GST TDS, if applicable

• Labour cess, if applicable

• Previous excess payment adjustment

Example:

Deduction	Amount
Retention 5%	₹75,950
Mobilization Advance Recovery	₹1,00,000
TDS 1%	₹15,190
Other Deduction	₹10,000

Total Deductions: ₹2,01,140

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7. Tax is Calculated

GST is applied as per the applicable tax rate on construction services or works contract.

Example:

Particular	Amount
Current Work Value	₹15,19,000
GST 18%	₹2,73,420
Gross Bill Amount	₹17,92,420
Less Deductions	₹2,01,140
Net Payable	₹15,91,280

The final payable amount depends on contract terms, GST treatment, TDS, retention, and advance recovery.

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8. RA Bill is Approved and Paid

After checking the RA bill, the client or project owner approves it for payment.

The approval process may include:

• Site engineer approval

• Project manager approval

• Billing engineer approval

• Consultant approval

• Client approval

• Accounts approval

Once approved, payment is released against the RA bill.

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Types of RA Bills

1. Client RA Bill

This is raised by the main contractor to the client.

Example:

A construction company raises an RA bill to a real estate developer for completed RCC, brickwork, and plaster work.

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2. Subcontractor RA Bill

This is raised by a subcontractor to the main contractor.

Example:

An electrical subcontractor raises an RA bill for completed conduit work, wiring, or panel installation.

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3. Material-Based RA Bill

Sometimes billing is based on supplied or consumed material quantity.

Example:

Billing for steel fabrication, ready-mix concrete, or structural items.

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4. Milestone-Based RA Bill

Some contracts follow milestone billing instead of quantity billing.

Example:

Milestone	Billing %
Foundation Completion	15%
Structure Completion	35%
Brickwork Completion	20%
Finishing Completion	20%
Handover	10%

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Important Components of RA Bill

A proper RA bill should include:

• Project name

• Client name

• Contractor name

• RA bill number

• Billing period

• Work order number

• BOQ reference

• Previous billed quantity

• Current billed quantity

• Cumulative billed quantity

• Rate

• Current bill amount

• Previous bill amount

• Total work done till date

• Retention deduction

• Advance recovery

• GST

• TDS

• Net payable amount

• Certification status

• Approval details

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Sample RA Bill Summary

Particular	Amount
Total Work Done Till Date	₹45,00,000
Previous Bill Amount	₹29,81,000
Current Work Value	₹15,19,000
GST 18%	₹2,73,420
Gross Current Bill	₹17,92,420
Retention Deduction	₹75,950
Advance Recovery	₹1,00,000
TDS	₹15,190
Other Deduction	₹10,000
Net Payable	₹15,91,280

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Difference Between Invoice and RA Bill

Many people confuse RA Bill with a normal invoice. Both are related to billing, but they are not exactly the same.

Point	RA Bill	Invoice
Purpose	To claim payment for running work completed	To legally bill for goods or services
Used In	Construction and project-based work	All industries
Based On	BOQ, measurement, certified quantity	Sales or service value
Frequency	Periodic during project execution	As per sale or service
Includes Measurement	Yes	Usually no
Includes Previous and Cumulative Qty	Yes	Usually no
Certification Required	Yes	Not always
Accounting Entry	After approval or billing	Direct accounting document

In ERP, RA Bill may be used as a project billing document, and after approval it can generate a sales invoice or purchase invoice.

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RA Bill vs Final Bill

RA bills are raised during the project. Final bill is raised after project completion.

Point	RA Bill	Final Bill
Timing	During project execution	After project completion
Quantity	Partial or running quantity	Final certified quantity
Purpose	Interim payment	Final settlement
Retention	Usually deducted	May be adjusted or released later
Scope	Work completed till billing period	Complete project work

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Common Problems in Manual RA Billing

Many construction companies still prepare RA bills in Excel. This creates problems like:

• Wrong previous quantity

• Wrong cumulative quantity

• Duplicate billing

• Overbilling

• Missed deductions

• Wrong retention calculation

• No link with BOQ

• No link with measurement book

• No approval workflow

• No project profitability visibility

• Delay in client certification

• Difficulty tracking pending bills

These issues directly affect cash flow and profitability.

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Why RA Billing Should Be Managed in ERP

A construction ERP can make RA billing more accurate and controlled.

ERP helps in:

• Linking RA bill with BOQ

• Auto-fetching previous billed quantity

• Capturing current measurement

• Calculating cumulative quantity

• Applying approved rates

• Managing retention

• Recovering advances

• Calculating taxes

• Tracking approvals

• Generating invoice after approval

• Tracking payment status

• Connecting billing with project profitability

This gives management better visibility over work done, amount billed, amount received, and project margin.

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RA Billing Workflow in Construction ERP

A good ERP should follow this workflow:

Project → BOQ → Work Order → Site Execution → Measurement Book → RA Bill → Approval → Invoice → Payment → Project Profitability

For subcontractor billing, the flow can be:

Subcontractor Work Order → Work Execution → Measurement Book → Subcontractor RA Bill → Approval → Purchase Invoice → Payment

This ensures that both client billing and subcontractor billing are controlled.

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Important RA Billing Reports in ERP

A construction ERP should provide the following RA billing reports:

• RA Bill Summary

• RA Bill Register

• BOQ vs Billed Quantity Report

• Previous vs Current Billing Report

• Certified Quantity Report

• Pending RA Bill Approval Report

• Retention Deduction Report

• Advance Recovery Report

• Client Billing vs Collection Report

• Subcontractor Billing Report

• Project-wise Billing Report

• Project Cash Flow Report

• Project Profitability Report

These reports help the company monitor billing, collections, deductions, and profitability.

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Example of RA Bill in Construction ERP

Suppose a contractor has a work order of ₹1 crore.

Till last month, the contractor already billed ₹30 lakh.

This month, the certified work value is ₹15 lakh.

Then the RA bill will show:

Particular	Amount
Total Contract Value	₹1,00,00,000
Previous Bill Value	₹30,00,000
Current Bill Value	₹15,00,000
Cumulative Bill Value	₹45,00,000
Balance Work Value	₹55,00,000

Now deductions may apply:

Deduction	Amount
Retention 5%	₹75,000
Advance Recovery	₹1,00,000
TDS 1%	₹15,000

After GST and deductions, the net payable amount is calculated.

This gives clear visibility of previous billing, current billing, cumulative billing, and balance work.

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Benefits of RA Billing in ERP

RA billing in ERP helps construction companies:

• Improve billing accuracy

• Reduce manual Excel errors

• Avoid duplicate billing

• Track certified quantities

• Control subcontractor payments

• Improve cash flow

• Track retention and advance recovery

• Improve client billing transparency

• Connect billing with accounting

• Monitor project profitability in real time

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Final Thoughts

RA Bill is one of the most important documents in construction management. It helps contractors claim payment for completed work during project execution and helps clients verify and pay based on certified quantities.

A proper RA billing system should always be linked with BOQ, Measurement Book, approvals, deductions, taxes, invoices, and project profitability.

For any construction company, managing RA bills manually in Excel can become risky as the number of projects, subcontractors, and BOQ items increases.

A well-implemented Construction Management ERP can make RA billing more accurate, transparent, and profitable by connecting site execution, measurement, billing, accounts, and project costing in one system.