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GST invoicing · service businesses · Construction

Invoicing Software for Construction Contractors

Progress billing on works contracts, 194C tracked, and retention money chased.

For Construction businesses

A construction contractor bills in milestones — mobilisation advance, foundation, slab, fit-out, handover — against a sanctioned contract value, but the client holds back 5–10% of each running bill as retention until the project is complete. Corporate and government clients also deduct 194C TDS on every payment. Most contractors track this in a notebook and reconcile the mess at year-end.

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Flat ₹399/month · Unlimited users · No card required · Cancel anytime

How construction billing works

Construction billing is progress-based: running bills as each work stage completes, an advance on mobilisation, and a final bill on handover with retention released. 399Apps raises each running bill as a works-contract GST invoice, records the mobilisation advance and adjusts it against later bills, and tracks client-wise outstanding — including retained amounts — with AR aging so overdue payments and held retention are visible before the project closes.

GST & TDS, handled right

Works contracts attract 18% GST under SAC 9954 for most commercial, industrial, and above-threshold residential projects, and 5% for affordable residential housing. The tax applies to the full contract value. Corporate and government clients deduct TDS under Section 194C at 1% for individual or HUF contractors or 2% for firms and companies — 399Apps records TDS-on-AR section-wise so your 26AS reconciliation is clean and the credit is not lost.

The billing problems it solves

Different service, same trap — money earned that never quite gets billed or collected. Here's what 399Apps keeps straight for construction contractors:

Retention money, never tracked

Record the amount withheld on each running bill; AR aging shows how long each retention has been held.

194C deducted from every payment

TDS withheld on each running bill is logged section-wise — 26AS reconciles and you claim the credit.

Advances muddled with running bills

Record the mobilisation advance and adjust it cleanly against each subsequent running and final invoice.

Multiple projects tangled

Client-wise outstanding keeps each site's billing and collection separate.

What you get

  • ✓Works-contract GST invoices (SAC 9954, 18% or 5%)
  • ✓Progress / milestone billing with advance adjustment
  • ✓Retention tracking in client-wise AR aging
  • ✓TDS-on-receipts (194C), 26AS-ready
  • ✓Project-wise outstanding & overdue alerts
  • ✓Quotes / estimates → invoice conversion

One flat price — the whole team invoices

Most invoicing tools charge per user or per invoice, so growing your practice grows the bill. 399Apps is a flat ₹399/month per app for each additional app — GST invoicing, TDS reconciliation and receivables in one system, unlimited users, cloud or self-hosted. Adding partners, associates or account managers never raises the price.

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FAQ

Invoicing software for construction contractors — FAQ

Does 399Apps work for construction contractors? +
Yes. 399Apps (Nidhi Books) is built for the way construction contractors actually invoice. Construction billing is progress-based: running bills as each work stage completes, an advance on mobilisation, and a final bill on handover with retention released. 399Apps raises each running bill as a works-contract GST invoice, records the mobilisation advance and adjusts it against later bills, and tracks client-wise outstanding — including retained amounts — with AR aging so overdue payments and held retention are visible before the project closes.
How does GST and TDS work for construction businesses in 399Apps? +
Works contracts attract 18% GST under SAC 9954 for most commercial, industrial, and above-threshold residential projects, and 5% for affordable residential housing. The tax applies to the full contract value. Corporate and government clients deduct TDS under Section 194C at 1% for individual or HUF contractors or 2% for firms and companies — 399Apps records TDS-on-AR section-wise so your 26AS reconciliation is clean and the credit is not lost.
How much does invoicing software cost for a construction business? +
A flat a flat ₹399/month per app — the same price across India, with no per-user licence and no per-invoice fee. A solo professional and a growing construction firm pay the same base price.
Can I track who still owes me and follow up on time? +
Yes. Every invoice carries a due date, and AR Aging buckets receivables into current, 1–30, 31–60, 61–90 and 90+ days overdue with per-client outstanding — so you chase the slippers before the money is really late, without a manual ledger.
Can I run it on the cloud or on my own server? +
Both. Run 399Apps fully managed on the 399apps cloud with daily backups and an India data region, or self-host it on your own server for complete data ownership. The same invoicing and GST features work either way.
Try 399Apps

Affordable invoicing software for construction contractors — from ₹399/month

GST invoicing, TDS reconciliation and receivables in one system, with unlimited users. Start your free 14-day trial — no card required.

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