GST-native from day one
GST billing software for Indian construction firms
e-Invoice IRN generation, e-Way Bill for material movements, GSTR-1 ready exports, HSN/SAC summary, IGST/CGST/SGST place-of-supply logic, TDS handling — without per-document caps.
14-day free trial · Cancel anytime · GST-native from day one
GST in construction is harder than retail GST. Place-of-supply for inter-state contracts, RCM on transport, GTA invoices, 18%/12%/5% slab juggling on different work categories, e-Way Bill for steel/cement movements — every one of these is a Notice waiting to happen. Rebaar bakes them all in at the invoice level.
What you actually get
e-Invoice IRN with QR — no document caps
Connect your own NIC sandbox or GSP credentials and Rebaar generates compliant JSON, POSTs to the IRP, and stores the signed IRN + QR on the invoice. Without credentials, falls back to a deterministic hash so dev flows keep working.
e-Way Bill for material movements
Construction firms move steel, cement, aggregate between stores and sites — every move ≥ ₹50k needs an EBN. Rebaar generates the AES-256-ECB-encrypted handshake the NIC API expects, attaches the EBN to the delivery note.
GSTR-1 and 3B exports
Sales register + HSN summary + B2B/B2C split in the exact CSV / JSON formats the government portal accepts. Your CA uploads instead of re-keying.
Place-of-supply automatic
IGST vs. CGST+SGST split decided by the client's state vs. your supply state. The invoice header carries the place-of-supply code on every line.
HSN / SAC code library
Construction-relevant HSN/SAC codes pre-loaded (998311 works contract, 998341 architectural services, 7308 fabricated steel, etc.). Each BOQ line carries its code; the invoice HSN summary writes itself.
TDS deduction tracking
When the client deducts TDS at source (194C/J/I/Q), record the deduction against the invoice. Quarterly summary reconciles against the Form 26AS your CA pulls.
RCM and GTA invoices
Reverse-charge invoices for goods-transport-agency transactions. Separate ITC ledger, separate GSTR-3B treatment.
Audit trail for every GST mutation
Every GST-affecting change (invoice issued, voided, refunded, IRN cancelled) is recorded in the audit log with actor, before/after, and timestamp. Tax officers love a clean trail.
Rebaar vs typical GST billing tools
| Feature | Rebaar | Generic GST tools (Zoho Books, ClearTax Billing) |
|---|---|---|
| Construction-specific HSN/SAC pre-loaded | ✓ Yes | — No |
| RA bill format with retention | ✓ Yes | — No |
| e-Invoice IRN — bring your own GSP | ✓ Yes | Vendor-locked GSP |
| e-Way Bill from inside invoice | ✓ Yes | Separate workflow |
| GSTR-1 / 3B export | ✓ Yes | ✓ Yes |
| TDS 194C/J/I/Q tracking | ✓ Yes | Limited |
| Project / BOQ / vendor linkage | ✓ Yes | — No |
| Indian payroll EPF/ESI/PT bundled | ✓ Yes | — No |
Based on publicly available product information at time of writing. Competitor features evolve — verify before signing.
Frequently asked questions
Is e-Invoice mandatory for my construction firm?
e-Invoice (IRN generation) is mandatory in India for B2B invoices once your annual aggregate turnover crosses ₹5 crore (as of FY 2026-27 — the threshold has been progressively lowered). Below ₹5 cr it's optional but recommended because it makes input-tax-credit claims easier for your clients.
How does the bring-your-own-credentials model work?
You sign up for your own NIC sandbox or GSP (Adaequare, ClearTax, Cygnet, etc.). You connect those credentials in Rebaar → Settings → Integrations. Rebaar uses your account for every e-Invoice / e-Way request. We never see your data flow through our keys, and there's no per-document upcharge from us.
What happens if my GSP credentials are wrong?
The route returns a clear error message identifying which field the GSP rejected. The invoice itself is still created in Rebaar; only the IRN generation is paused. Re-attempting is one click.
Does Rebaar handle works-contract GST at 12% and 18%?
Yes. The BOQ-line tax rate is configurable per item. Pure labour contracts at 18%, works contracts with material at 18%, certain government works at 12% — pick the right slab per line, the invoice composes correctly.
Can I generate GSTR-1 directly from Rebaar?
You can generate a GSTR-1-format CSV/JSON export. Direct upload to the government portal requires NIC API credentials (separate from e-Invoice credentials) which we don't have yet — you upload the file manually. Your CA does this anyway.
What about reverse charge (RCM)?
RCM invoices (e.g. GTA transport bills you receive) are recorded as RCM-applicable. The output liability is added to your GSTR-3B; the input tax credit is taken separately. Rebaar separates the two so you don't double-count.
How are TDS deductions reconciled?
When a client pays you and deducts TDS at source, you record the deduction against the invoice. At end of quarter, Rebaar produces a deduction summary by PAN. You compare that against your Form 26AS. Mismatches show up immediately.
Is the data audit-proof for a GST officer?
Every invoice / payment / void / refund event is in the audit log with actor user, timestamp, and before/after diff. The log is append-only at the application layer. Combined with database backups and the immutable IRN trail, this is what officers expect when they audit a construction firm.
GST shouldn't be the hardest part of running a construction firm
Try Rebaar free for 14 days. Issue your first IRN-signed invoice in under 15 minutes.