GST Billing and Accounting Software
GST billing and accounts that stay compliant without month-end panic.
FinOps OS covers payables, receivables, reconciliation and tax compliance in 29 modules for Indian finance teams, priced once in rupees.
- E-invoicing
- Reconciliation
- No per-user fees
Free 30-minute call with a senior specialist. Reply within one business day. Based in Jaipur, working with businesses across India.
- Discovery callFree 30 minutes with a senior specialist
- Scoped first phaseWritten scope, timeline and fixed price
- Build with weekly demosWorking software you can see every week
- Launch and supportGo-live with your team ready, then ongoing support
What is GST-ready accounting software?
GST-ready accounting software raises compliant invoices, tracks payables and receivables, reconciles bank and tax data, and keeps filings consistent with the books. Stack18's FinOps OS covers payables, receivables, reconciliation and tax compliance for Indian finance teams in 29 modules. Editions cost Launch ₹2.4L, Grow ₹6.2L and Scale ₹9.5L, one-time, excluding GST.
You need this when…
Tap the ones that apply to you.
GST Billing and Accounting Software, end to end.
Each capability is delivered by the same team on the Agentic SDLC, with your approval at every critical step.
Receivables
Collect faster.
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Payables
Pay on time.
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Reconciliation
Books that match.
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Tax compliance
Filing-ready data.
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Document AI
Less typing.
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Reporting
Owner and auditor views.
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A typical engagement, step by step.
Senior people lead every phase. Specialised AI agents on the Agentic SDLC handle the repetitive work, and nothing ships without your approval.
Discover
Map the current process, data and priorities.
Design
Agree modules, integrations and rules.
Build
Configure and extend in weekly demos.
Launch
Data migration, training and go-live support.
Start small. Scale when it works.
Every engagement begins with a short, fixed-price step so you can judge the fit before committing further. See pricing.
Discovery Sprint
Teams deciding what to build first.
- Duration
- 1–4 weeks
- Pricing
- Fixed price
- Scoped plan and timeline
- Team and fixed price
- Process map or prototype
FinOps OS Launch
Teams that want to go live fast.
- Duration
- 3–4 weeks
- Pricing
- From ₹2.4L, one-time
- 8 modules
- Data migration
- Training
Custom finance workflow
Needs that a ready-made system does not cover.
- Duration
- 4–16 weeks
- Pricing
- Fixed price per phase
- Weekly working demos
- Senior team accountable
- 30 days hypercare
What we have shipped, and what a typical engagement looks like.
Delivered projects link to the full case study. Illustrative scenarios describe typical engagements and are not named client results.
Trading firm
- Challenge
- Collections chased by phone.
- What we do
- Ageing and reminders.
4–6 weeks
Services company
- Challenge
- Reconciliation takes days.
- What we do
- Matching and exception queue.
4–5 weeks
Ethnic wear D2C, Jaipur
- Challenge
- A ₹100+ crore brand needed website, app and back office to share one catalogue and one record of stock and orders.
- What we do
- Nine specialists built website, mobile app and ERP on one connected foundation in two-week sprints.
3 months
Read the case study →Free finance workflow review
Walk us through invoicing to reconciliation. We map what to automate.
- Workflow map
- Edition fit
- Timeline
We agree targets before we start.
Every engagement has a baseline and a target on the measures that matter to you, reported at every read-out.
GST Billing and Accounting Software questions.
Is it GST-ready?
Yes, built for Indian compliance.
Cost?
Launch ₹2.4L, Grow ₹6.2L, Scale ₹9.5L, one-time excluding GST.
Per-user fees?
None.
Timeline?
Launch 3–4 weeks.
Tally migration?
Validated data migration runs.
Is AI involved?
Optional Document AI with human review.
Let's scope your GST Billing and Accounting Software project.
Tell us where you are and where you want to be. A senior specialist will reply within one business day with next steps.
- Free 30-minute consultation
- Indicative estimate after the call
- NDA available on request