The price of custom POS software is driven by seven things: the number of branches and counters, how unusual your pricing, tax and promotion rules are, the hardware to support, whether it must run offline, the integrations with ERP, accounting, e-commerce and payment terminals, the data to migrate, and the support level after launch. Costs outside the build, such as card-processing fees and hardware replacement, are often as important as the build itself.
This guide deliberately prints no dollar ranges for custom POS. Published figures for "custom POS software" vary by orders of magnitude because they describe different things: a single-store till with billing and stock is not the same product as a multi-branch, offline-capable system that posts into an ERP. A number without a scope is not information. What you can do is understand the drivers, ask the right questions of each quote, and compare against the real alternative, which is usually a subscription POS paid per terminal every month. Timeline Digital does not publish prices for custom software, because every project is custom. The custom POS software development page explains how a project is priced on its approved scope after a free pilot.
Why a single "price of a POS" does not exist
Three different things are sold under the label POS:
- A subscription product you rent per terminal or location, with the vendor's features and roadmap.
- A licensed product you buy once or annually, installed on your machines, with configuration but no source code.
- A custom build designed around your business, where you commission the software and (depending on the contract) own the code.
Each has a different cost shape. Subscriptions start cheap and grow with terminals and years. Licences cost more upfront and add upgrade fees. Custom builds cost the most upfront and can be the cheapest per counter over time, but only when the business is large or unusual enough that the build is used heavily. Comparing a one-off build cost with a first-month subscription price is the most common mistake in this decision.
The seven cost drivers
1. Branches, counters and users
A single counter with one user is the simplest case. Each added branch brings stock transfers, branch-level price lists, head-office consolidation, branch roles and more reports. Counters inside a branch add synchronisation and shared state. The jump is not linear: moving from one branch to several is where design effort rises most, because data must be consolidated and permissions separated.
2. Pricing, tax and promotion rules
Standard billing with one tax rate is cheap. Mixed tax rates, tax-inclusive and exclusive items, customer-specific price lists, tiered and quantity prices, bundles, happy-hour pricing and stacking rules each add logic that must be specified, built and tested with numeric examples. This is also where a packaged POS most often stops fitting, so it is where a custom build earns its cost.
3. Hardware
Every device model is a small integration. Standard thermal printers and keyboard-wedge scanners are easy. Weighing scales with unusual protocols, customer displays, kitchen display systems, label printers and mixed generations of devices are not. Owning hardware you must keep supporting costs more than letting the vendor recommend supported devices. Hardware itself (the devices) is a separate purchase from the software in almost every case.
4. Offline operation
A till that needs a connection is simpler than one that sells for a day without it. Offline-first adds local storage, a sync outbox, idempotent server writes, conflict rules and extensive testing. It is worth it where outages are common or the cost of a stopped counter is high, and it is worth being honest about where it is not. See offline-first POS architecture for what the work involves.
5. Integrations
Each connected system adds an interface to build, test and maintain: accounting or ERP postings, an online store's stock and orders, a card terminal's integration, delivery platforms, loyalty or messaging services and tax-authority invoicing such as FBR in Pakistan. The effort depends less on the idea than on the other system's API quality, sandbox availability and credentials. A POS feeding a full custom ERP is a larger project than a stand-alone till, but removes re-keying.
6. Data migration
Moving your item list, barcodes, opening stock per branch and customer balances into the new system is real work. Clean data is quick; ten years of duplicate items and inconsistent units is not. Budget time for cleaning, a stock count at cutover and reconciliation.
7. Support level and who maintains it
A system with a 24-hour response commitment and active monitoring costs more to support than one with next-business-day fixes. Budget for support from the start; see software maintenance and support for what a support agreement should cover.
