🏗️ Cornerstone AI module · Payments

Construction Payment Management Software

Construction payment management software is a tool that lets a builder track and record payments to vendors and subcontractors against approved bills, deduct TDS correctly under Section 194C, release retention when it is due, and keep the vendor ledger current. Cornerstone AI takes an approved, matched supplier invoice, computes the net payable after TDS and retention, records the payment, and exports it to Tally, so what goes out always matches what was approved. When you want to know what is due this week or how much TDS you deducted this month, ask the GenAI chat.

Part of Cornerstone AI · 500+ features · TDS under 194C · retention tracked · Tally export

Cornerstone Payment PAY-2208 · Marina Approved Pay Net payable Tiling subcontractor · firm Approved billRs 3,78,000 Less TDS 194C (2%)– 6,400 Less retention (5%)– 18,900 NET PAYABLE NOW Rs 3,52,700 TDS this month Rs 1.82 L 23 payments · 194C ready for TDS return Retention held Rs 18,900 release at DLP stage tracked for release Due this week Rs 11.4 L · 7 bills Sri SteelThuRs 4.2 L Tiling subcontractor (net)FriRs 3.53 L
From bill
pay approved invoices
TDS
deducted under 194C
Retention
held and released
Tally
export and ledger
17+ yrs
iStudio, Chennai
01 How it works

The payment flow, from approved bill to recorded payout

Cornerstone AI’s construction payment management software moves every payment through the same controlled path, so the vendor is paid the correct net amount, TDS is deducted, retention is held, and the books stay in sync.

1

Start from approval

Pick an approved, 3-way matched supplier invoice to pay.

2

Deduct TDS

TDS under 194C is computed on the eligible amount.

3

Hold retention

Any contract retention is deducted from this payment.

4

Net payable

The clear net figure is what the vendor is paid now.

5

Record & post

The payment updates the ledger and exports to Tally.

No technical experience needed

Making a payment is picking the approved bill and confirming the net the software has already worked out. The TDS and retention are computed for you, so your accounts person does not do the maths by hand or risk deducting the wrong rate. And when the owner wants to know what is due this week or the TDS for the month, they do not open a ledger. They ask the GenAI chat.

02 The basics

What is TDS under Section 194C on contractor payments?

Section 194C of the Income Tax Act requires a payer to deduct TDS, tax deducted at source, when paying a resident contractor or subcontractor for work under a contract. The deduction is made at payment, deposited with the government, and credited to the contractor. For a construction firm paying dozens of subcontractors, getting this right on every payment matters.

✓ The rate

  • 1 percent when the payee is an individual or HUF
  • 2 percent when the payee is any other entity
  • Deducted on the contract amount at payment
  • Deposited with the government on the contractor’s behalf

✓ The threshold

  • Applies when a single payment is over Rs 30,000
  • Or when yearly payments to the party cross Rs 1 lakh
  • Below these, TDS is generally not required
  • Rules and rates can change, so confirm the current ones

Why the software should handle this, not a person

Deducting TDS by hand across many subcontractors invites two errors: the wrong rate, and missed thresholds. Both cause trouble at return time. Cornerstone AI computes the 194C deduction on each eligible payment at the correct rate and flags when a party crosses the annual threshold, so the deduction is consistent and the records are ready for your TDS return. The figures here are general guidance, and your final tax position should be confirmed with your accountant or advisor.

03 The basics

How the net payable is calculated

The amount a vendor is actually paid now is rarely the full invoice. It is the approved amount, less the TDS due, less any retention held under the contract. Cornerstone AI shows every step, so the net that goes out is clear and defensible.

1

Approved amount

The invoice figure that passed the 3-way match and approval.

2

Less TDS

The 194C deduction at the right rate for the payee.

3

Less retention

The contract retention held back on this bill.

4

Net payable

The clear amount the vendor is paid in this payment.

One screen, no disputes

Because the gross, the TDS and the retention are all shown on the way to the net, the vendor sees exactly why the payment is what it is. There is no “why is this less than my bill?” argument, because the deduction is itemised and tied to the rule or the contract clause behind it. The approved invoice drives it, so the payment can never quietly exceed what was signed off.

04 A real walkthrough

See the construction payment flow, step by step

Here is a real payment. A subcontractor’s approved bill on the “Marina Residency” villa in Chennai, from net calculation to a recorded payout.

Step 1 & 2 · Approved bill, TDS

Start from the approved bill and deduct TDS

The tiling subcontractor’s bill for Rs 3.78 L has been 3-way matched and approved. The subcontractor is a partnership firm, so TDS under 194C applies at 2 percent on the work value. Cornerstone AI computes Rs 6,400 TDS automatically, so there is no guesswork about the rate and no risk of under-deducting.

Example: Approved bill Rs 3.78 L. Payee is a firm, so 194C TDS at 2 percent = Rs 6,400 deducted.
Cornerstone Payment PAY-2208 · Marina Approved Pay Net payable Tiling subcontractor · firm Approved billRs 3,78,000 Less TDS 194C (2%)– 6,400 Less retention (5%)– 18,900 NET PAYABLE NOW Rs 3,52,700 TDS this month Rs 1.82 L 23 payments · 194C ready for TDS return Retention held Rs 18,900 release at DLP stage tracked for release Due this week Rs 11.4 L · 7 bills Sri SteelThuRs 4.2 L Tiling subcontractor (net)FriRs 3.53 L
Step 3 & 4 · Retention and net

Hold retention, see the clear net

The contract holds 5 percent retention on the subcontractor’s work, so Rs 18,900 is retained from this bill and tracked for release later. After TDS and retention, the net payable is Rs 3.53 L. The subcontractor sees the gross, the TDS, the retention and the net on one statement, so there is nothing to argue about.

Example: Gross 3.78 L, less TDS 6,400, less retention 18,900 = net payable Rs 3.53 L. Retention tracked for release.
Cornerstone Payment PAY-2208 · Marina Approved Pay Net payable Tiling subcontractor · firm Approved billRs 3,78,000 Less TDS 194C (2%)– 6,400 Less retention (5%)– 18,900 NET PAYABLE NOW Rs 3,52,700 TDS this month Rs 1.82 L 23 payments · 194C ready for TDS return Retention held Rs 18,900 release at DLP stage tracked for release Due this week Rs 11.4 L · 7 bills Sri SteelThuRs 4.2 L Tiling subcontractor (net)FriRs 3.53 L
Step 5 · Record and post

Record the payment, update the books

The net is paid through the firm’s bank, and the payment is recorded against the subcontractor and the project. The vendor ledger updates, the TDS entry is captured for the return, and the whole payment exports to Tally. The retained Rs 18,900 sits on the record, ready to release at the defect-liability stage.

Example: Rs 3.53 L paid and recorded. TDS logged for the return, exported to Tally, retention of Rs 18,900 scheduled for release.
Cornerstone Payment PAY-2208 · Marina Approved Pay Net payable Tiling subcontractor · firm Approved billRs 3,78,000 Less TDS 194C (2%)– 6,400 Less retention (5%)– 18,900 NET PAYABLE NOW Rs 3,52,700 TDS this month Rs 1.82 L 23 payments · 194C ready for TDS return Retention held Rs 18,900 release at DLP stage tracked for release Due this week Rs 11.4 L · 7 bills Sri SteelThuRs 4.2 L Tiling subcontractor (net)FriRs 3.53 L
05 GenAI chat

Just ask, and the GenAI chat reads your payments

Alongside the normal payment screens, the built-in GenAI assistant lets anyone ask about dues, TDS and retention in plain English. No ledger to open, no report to build.

Cornerstone AI · Assistant
Ask anything about payments
What vendor payments are due this week?
✦ Cornerstone AIRs 11.4 L across 7 approved bills:
Sri SteelRs 4.2 L · Thu
Tiling subconRs 3.53 L net · Fri
Sand supplierRs 1.1 L · Fri
How much TDS did we deduct this month?
✦ Cornerstone AIRs 1.82 L of TDS across 23 payments, 194C on contractors. Rs 46 K of retention is also due for release on 3 subcontractors.
Ask about dues, TDS, retention, net payable…↑
✦ GenAI built into every module

No ledger to open. Just type the question.

Every Cornerstone AI module can be run the normal way, with forms, lists and a payment register. On top of that, the GenAI chat lets you ask about payments in plain language. Ask “what is due this week?”, “how much TDS this month?”, or “whose retention is due for release” and the assistant reads your live payment data and answers in seconds, with a table when that helps.

That means an owner can plan cash and check compliance, from a phone, without opening a single ledger. They just ask. It is what makes Cornerstone AI usable by a whole team, not only the accountant.

The GenAI chat is a core Cornerstone AI capability, implemented within the application. Examples shown are illustrative of how it answers.

06 What you get

Modern construction payment management software features

Everything a builder needs from vendor payment software and subcontractor payment software: pay the right net, deduct TDS, hold retention, and keep the books clean.

Pay from approval

Pay only invoices that passed the 3-way match and were approved.

TDS under 194C

TDS computed at the right rate for the payee, ready for your return.

Retention tracking

Retention held per bill and released when it is due, never forgotten.

Net payable shown

Gross, TDS, retention and net on one screen, so the payout is clear.

Vendor ledger

Every payment updates what each supplier was billed, held and paid.

Ageing & dues

See what is due and when, so payments are on time, not early or late.

Approval before pay

Payments route for the sign-off your rules require before they go out.

Tally export

Payments with TDS and retention entries export to Tally, no re-keying.

Project-tagged

Every payment is tagged to its project, so job cost stays accurate.

07 Retention

How retention is held and released

Retention is a small percentage of each subcontractor bill held back as security, released later once the work has proved sound. It protects the builder, but only if it is tracked, because retention that is forgotten is money owed that nobody releases and relationships that quietly sour.

Held on every bill

When a subcontractor bill is paid, the contract retention, often 5 percent, is deducted from the net automatically and recorded against that subcontractor. The subcontractor sees it clearly on the payment statement, so there is no surprise about why the payout is less than the bill.

Accumulated and visible

Retention builds up across every bill a subcontractor raises, and the running total is visible on their ledger. At any point you can see exactly how much is being held from each party, which matters both for the builder’s cash position and for an honest conversation with the subcontractor.

Released when due

At the agreed stage, often at project completion or the end of the defect-liability period, the retention is due for release. Because it is tracked rather than buried, the release is flagged and paid against the same vendor record. The subcontractor gets what is theirs on time, which is exactly how good subcontractors are kept.

08 The problem & the fix

What’s broken in paying vendors on a spreadsheet, and how Cornerstone AI fixes it

These are the real problems builders hit managing payments on a spreadsheet and memory. Cornerstone AI’s construction payment management software was built against each one.

⚠️ With spreadsheets & memory

  • TDS deducted at the wrong rate, or missed
  • Thresholds crossed without anyone noticing
  • Retention held but never released
  • Payments made that exceed the approved bill
  • No clear view of what each vendor is owed
  • Every payment re-entered into Tally by hand

✓ With Cornerstone AI payments

  • TDS computed at the right 194C rate every time
  • Annual thresholds flagged automatically
  • Retention tracked and released when due
  • Payment can never exceed the approved amount
  • A live vendor ledger of owed, held and paid
  • Payments exported to Tally with TDS intact

These pain points reflect widely reported problems with manual construction payments. See the Income Tax Department (TDS) on Section 194C and PMI on cost control. This page is general information, not tax advice. Content was rephrased for clarity.

09 A real sample

Sample: a vendor payment, with TDS and retention

A clean payment statement showing the gross, the TDS under 194C, the retention held, and the net payable.

Payment · PAY-2208 Tiling subcontractor Status: Approved to pay
LineBasisAmount
Approved bill3-way matchedRs 3,78,000
Less TDS 194C2 percent, firmRs 6,400
Less retention5 percent heldRs 18,900
Net payable nowRs 3,52,700
Retention balancefor release laterRs 18,900

Sample data shown for illustration. TDS rate and retention percent are configurable and should be confirmed with your advisor.

10 Examples

Construction payment examples: everyday tasks

Common things accounts and finance teams do with payments every day.

Pay

Pay an approved bill

Pick a 3-way matched invoice and the net after TDS and retention is ready.

TDS

Deduct 194C correctly

The software applies 1 or 2 percent by payee type, no manual lookup.

Retention

Hold subcontractor retention

Deduct 5 percent on this bill and track the running retained balance.

Release

Release retention on time

At the defect-liability stage, the due retention is flagged and paid.

Tally

Export the payment

Push the payment with its TDS and retention entries straight to Tally.

Ask

Check TDS for the month

Ask the GenAI chat how much TDS was deducted and what is due to pay.

See it live on your own payments

Book a free, no-obligation demo. We will take an approved bill on data shaped like yours, deduct TDS under 194C, hold retention, show the clear net payable, and export the payment to Tally, so you can see payments that stay compliant and on time.

Book a live demo
11 In depth

Construction payment management software, explained for Indian builders

Payment is where compliance is won or lost

TDS and retention are not optional niceties, they are obligations, and they both land at the moment of payment. A builder who pays on a spreadsheet is one wrong rate or one missed threshold away from a notice at return time. Construction payment management software moves that risk off a person’s memory and into a rule the software applies every time, so compliance happens as a by-product of paying, not as a separate scramble.

You can only pay what was approved

The strongest control in payments is upstream: a payment can only be made against a supplier invoice that was already 3-way matched and approved. So the common leak, a payment that quietly exceeds the bill or pays a bill nobody checked, simply cannot happen. The discipline of the purchase order and the goods receipt is carried all the way through to the money leaving.

Retention is a promise you must keep

Every rupee of retention held is money the builder owes the subcontractor later. Held on a spreadsheet, it is the kind of thing that gets forgotten, and a forgotten retention is both an unrecorded liability and a subcontractor who will not come back. Tracking retention per bill and flagging it for release when due turns a hidden liability into a managed one, and keeps the good subcontractors who make a project easy.

Cash flow you can actually plan

A builder’s biggest stress is cash timing. When payment dues, with their real net amounts after TDS and retention, are visible ahead, cash can be planned instead of fought week to week. You pay on time to protect your best suppliers, delay where you have agreed terms, and never get surprised by a large net you forgot was coming. The owner sees the real obligation, not a vague fear.

The books stay true without double entry

Most Indian builders keep their accounts in Tally. When a payment is recorded in one system and re-keyed into another, the two drift apart and month-end becomes reconciliation misery. Because payments export to Tally with their TDS and retention entries intact, the payment is captured once and the books reflect it, so the project record and the accounts tell the same story.

Payments inside the ERP, not a separate tool

A standalone payment or accounting tool records that money went out, but it does not know what the payment was for. It cannot tie the payout to the approved bill, the purchase order, the goods received or the project budget, so the payment is just a number, disconnected from the work it paid for. Reconciling the money against the job is then a manual, month-end chore.

In Cornerstone AI the payment is the last link of a connected chain on the project. It flows from an approved supplier invoice, carries TDS and retention, updates the vendor ledger, tags to the project budget, sits beside expenses, and exports to Tally. One record runs from order to delivery to bill to payment, which is what lets the GenAI chat answer “what is due, how much TDS this month, and whose retention is pending” with a real number instead of a guess.

What builders need and rarely get: payments made only against approved bills, TDS deducted at the correct 194C rate every time, retention held and released on schedule, a clear net on every payout, a live vendor ledger, cash dues visible ahead, and a clean Tally export. Getting that loop inside the ERP is the point, instead of a payment spreadsheet that invites a compliance notice.

How to choose construction payment management software

Look for payments made only from approved, matched invoices, TDS computed under 194C at the right rate, retention held and released on schedule, a clear net-payable breakdown, a live vendor ledger, cash-due visibility, and a clean Tally export. Most of all, look for payments that sit inside the project, not a separate tool, so a payout is tied to the bill, the order and the budget it belongs to. Cornerstone AI does all of this inside a full construction ERP. Explore the supplier invoice module payments flow from, the expense module alongside it, or the Cornerstone AI overview.

iS

Built by iStudio Technologies · Chennai

Written from hands-on experience building payment, TDS and vendor-finance workflows for Indian builders at iStudio Technologies, a Chennai software company with 17+ years delivering web, mobile and ERP products. About iStudio Technologies.

Updated: October 2026. Serving builders and contractors across Chennai, Tamil Nadu and India. Figures are illustrative. This page is general information, not tax advice; confirm TDS positions with your advisor.

12 Questions

Construction payment management software FAQ

What is construction payment management software?
Construction payment management software is a tool that lets a builder track and record payments to vendors and subcontractors against approved bills, deduct TDS and release retention correctly, and keep the vendor ledger current. Cornerstone AI takes an approved supplier invoice, computes the net payable after TDS and retention, records the payment, and exports it to Tally, so what is paid always matches what was approved.
What is TDS under Section 194C on contractor payments?
Section 194C of the Income Tax Act requires a payer to deduct TDS, tax deducted at source, when paying a resident contractor or subcontractor for work under a contract. The common rate is 1 percent for an individual or HUF and 2 percent for other entities, and TDS generally applies when a single payment exceeds Rs 30,000 or the yearly total crosses Rs 1 lakh. Cornerstone AI computes the deduction on each eligible payment, though the final tax position should be confirmed with your advisor.
How is the net payable calculated?
The net payable starts from the approved invoice amount, then subtracts the TDS due under 194C and any retention held under the contract. The result is what the vendor is actually paid now. Cornerstone AI shows the gross, the TDS, the retention and the net on one screen, so the figure that goes out is clear and correct.
Does it track retention and release it correctly?
Yes. Retention held on each subcontractor bill is recorded, so the net payment now is after retention, and the retained balance is tracked. When the retention is due for release, usually at a milestone or defect-liability stage, it is visible and paid against the same vendor record rather than forgotten.
Does a payment start from an approved invoice?
Yes. A payment is made against a supplier invoice that has already been 3-way matched and approved, so you only ever pay bills that were checked against the purchase order and the goods receipt. Nothing is paid that did not pass the match and the approval first.
Does it keep a vendor ledger and payment history?
Yes. Every payment updates the vendor ledger, so you always know what a supplier was billed, what TDS and retention were held, what has been paid, and what is still due. The full payment history sits against the vendor and the project.
Does it export payments to Tally?
Yes. Recorded payments, with their TDS and retention entries, can be exported to Tally, so your books stay in sync without re-keying each payment by hand. The GenAI chat will tell you what is due this week and how much TDS was deducted this month when you ask.
Does Cornerstone AI move the money itself?
Cornerstone AI manages and records the payment: it computes the net payable, captures that the payment was made, deducts TDS and retention, and updates the ledger and Tally. The actual transfer is done through your bank or payment method, and the software keeps the accurate record of it against the project and the vendor.
How much does it cost in India?
Cornerstone AI is priced for the Indian market and sized to your projects and users. Payments are part of the finance workflow in the platform rather than a separate add-on. A free demo is available and pricing is shared on request.
Who builds and supports it?
It is built and supported by iStudio Technologies, a Chennai-based software company with 17+ years of experience delivering web, mobile and ERP software for Indian businesses.

Book a free construction payment demo

See Cornerstone AI pay an approved bill, deduct TDS under 194C, hold and release retention, show the clear net payable, and export to Tally. Then ask the GenAI chat what is due and how much TDS this month. No technical experience needed.

iStudio Technologies · No. 5, 1st Floor, Arcot Road, Valsaravakkam, Chennai – 600087 · +91-8807003902 · info@istudiotech.in

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