POS Billing Software
Retail billing that is fast at the counter and accurate in the back office.
We build custom POS and billing software for retail shops and chains: barcode and keyboard billing, GST invoices, offline mode, inventory and purchase, loyalty and offers, payments and multi-store reporting.
- Barcode billing
- Offline mode
- Multi-store
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 POS billing software development?
POS billing software development builds point-of-sale systems for retail, covering fast billing, GST invoices, stock, purchases, offers and loyalty, and store reports. Stack18 builds custom POS for shops and chains, including offline operation, hardware integration and links to accounts or ERP.
Last reviewed 30 October 2026 by the Stack18 delivery team in Jaipur. Security and AI governance · Pricing · About Stack18
| What it covers | Counter billing; Inventory and purchase; Offers and loyalty; Payments and hardware; Multi-store and reports. |
|---|---|
| Typical first step | Discovery Sprint: 2 weeks, fixed price. |
| Build route | Fixed-scope first release: agreed in discovery; fixed price after discovery. |
| Long-term option | Transformation Pod: 12–36 months, annual contract. |
| Measured by | Billing time per customer; Stock accuracy; Offer errors; Reporting lag. Each against an agreed baseline. |
| Governance | Human approval at 5 governance gates before anything reaches production. NDA available on request. |
| Delivery team | Based in Jaipur, India. A senior specialist replies within one business day. |
You need this when…
Tap the ones that apply to you.
POS Billing Software, end to end.
Each capability is delivered by the same team on the Agentic SDLC, with your approval at every critical step.
Counter billing
Fast and flexible.
- Barcode and keyboard billing
- Returns and exchanges
- GST invoices and receipts
Inventory and purchase
Stock that matches reality.
- Stock in and out by store
- Purchase and supplier ledger
- Reorder alerts
Offers and loyalty
Promotions that apply correctly.
- Discount and offer rules
- Loyalty points
- Customer history
Payments and hardware
Works with your counter.
- UPI, cards and cash
- Printers and scanners
- Cash drawer and shift close
Multi-store and reports
Head-office visibility.
- Store-wise sales and stock
- Transfers
- Margin and fast-mover reports
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.
Discovery
Map how retail billing works today, the systems and data involved, and agree the first measurable outcome.
Design
Design the workflows, roles, integrations and approval points for retail billing.
Build in weekly demos
Your team sees working retail billing software every week, with changes agreed in the open.
Launch and support
Data migration, training, go-live support and a measured 30-day review against the baseline.
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 scope and priorities before they commit.
- Duration
- 2 weeks
- Pricing
- Fixed price
- Scoped plan and timeline
- Team and fixed price
- Process map or prototype
Fixed-scope first release
Teams that know what they need built.
- Duration
- Agreed in discovery
- Pricing
- Fixed price after discovery
- Written scope and acceptance criteria
- Weekly demos
- Handover with documentation
Transformation Pod
Multi-system programmes that run for years.
- Duration
- 12–36 months
- Pricing
- Annual contract
- Dedicated cross-functional team
- Quarterly business reviews
- One accountable partner
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.
Retail chain with four stores
- Challenge
- Billing and stock in separate tools; offers applied manually.
- What we do
- Custom POS with offer rules and multi-store stock.
Scoped in a 2-week sprint
Free retail billing review
Tell us where retail billing hurts most. We map what to fix first, whether ready-made or custom fits, and a realistic first step.
- Where to start and why
- Ready-made vs custom view
- Indicative 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.
POS Billing Software questions.
Does it work without internet?
We can design it to bill locally and sync later. We confirm the approach for your stores in discovery.
Which hardware does it support?
Common barcode scanners, receipt printers and cash drawers. We confirm yours.
Can it connect to Tally or our ERP?
Yes. We post sales and stock data to your accounts or ERP.
Is it for one shop or a chain?
Both. We start with one store and add locations.
Is it ready-made or custom?
Custom, scoped in a two-week Discovery Sprint. We reuse proven billing and inventory modules.
Often combined with.
Pharmacy POS
For chemists.
Explore →ExploreRestaurant POS and ERP
For dining.
Explore →ExploreGST Billing
Invoices and accounts.
Explore →ExploreInventory Management
Stock you can trust.
Explore →ExploreSubscription Billing Software
Subscription billing software for Indian businesses: plans, recurring invoices with GST, payment retries, upgrades, proration and revenue reports.
Explore →Guides, comparisons and proof.
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Read →Let's scope your POS Billing 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