Your McKinney counter rings up retail on Square and quotes contractors on paper: cost breakdown
A custom POS (Point of Sale) makes sense in McKinney when your selling floor mixes retail, trade accounts, and services in ways Square or Clover can't handle, or when the POS must integrate deeply with inventory and accounting. Expect $40,000 to $120,000 and 4 to 7 months. Square, Toast, Clover, and Lightspeed are excellent for standard retail and restaurants; go custom when trade accounts, complex pricing, or back-office integration break them.
If you are budgeting a build in McKinney, this is what actually moves the number, where aerospace and defense, professional and financial services, construction and real estate teams overspend, and how to scope so the quote matches the outcome.
A McKinney supply business or downtown retailer runs Square for walk-in sales and it's smooth, until a contractor walks in with a trade account, net terms, and tiered pricing. Square wasn't built for B2B at the counter. So the counter rings retail on the POS and handles trade on paper or a separate invoice, and the two never reconcile cleanly. Toast and Clover make the same assumption: one customer type, one pricing model, simple checkout.
The deeper issue is integration. A real McKinney merchant needs the POS to decrement inventory accurately across channels and post revenue to accounting without a nightly export-and-pray. Generic POS systems integrate at the surface but leak at the edges, especially when you sell both retail and trade, take net-terms orders, and need stock to stay accurate across a counter, a yard, and online. The expensive lesson is a register that's fast for the easy sale and useless for the profitable one.
The case for owning your pos
A custom POS handles both your easy sale and your profitable one. Trade accounts, net terms, and tiered pricing work at the counter alongside retail. Inventory decrements accurately across every channel in real time, and revenue posts to accounting cleanly without a nightly gamble. It's built for how a McKinney supply business or multi-channel retailer actually sells, so the counter stops being a bottleneck for your best customers.
What your build should include
McKinney POS: the full scope
Everything a POS build here can cover: restaurant POS, Square alternative, Toast alternative, Clover, Lightspeed, mobile POS and payment processing integration.
Budgeting a pos build in McKinney
| Project scope | Typical cost | Timeline |
|---|---|---|
| Mixed retail/B2B register core | $40k to $70k | 4 to 5 months |
| Pricing + inventory sync | $35k to $75k | 3 to 4 months |
| Full POS + accounting integration | $75k to $120k | 5 to 7 months |
Delivery, week by week
Exactly what you get
A POS that rings both your walk-in retail and your trade accounts at the same counter, with net terms and tiered pricing built in. Inventory decrements accurately across counter, yard, and online, and revenue posts to your accounting software cleanly, no nightly export gamble. It integrates with your inventory management software and ERP (Enterprise Resource Planning) so stock and cost stay true. The register stays fast and works offline, so a network blip never stops a McKinney sale.
How to choose a developer in McKinney
Choose a team that asks about your most profitable, most awkward sale, the contractor with a trade account, not just the walk-in. If they only design for standard retail, they'll leave your B2B on paper. Have them explain payment processing, PCI, and offline behavior, because a register that fails at checkout fails entirely. Favor partners who've integrated POS with inventory management software and accounting, since the leak is always at the edges.
- Trade accounts, net terms, and tiered pricing work at the counter, not on paper
- Inventory stays accurate across counter, yard, and online in real time
- Revenue posts to accounting cleanly, ending the fragile nightly export
- One system handles retail and B2B, so your best customers stop being a workaround
- Integrates with your inventory management software and ERP for true stock and cost visibility
- Payment processing, hardware, and PCI compliance add real complexity to a custom POS
- Square and Toast bundle support and hardware cheaply; custom means owning more of that yourself
- A POS must be rock-solid at the register, so testing and reliability work are non-negotiable cost
- For standard retail with no trade accounts, off-the-shelf POS is cheaper and faster to deploy
- !They treat it as standard retail; ask how trade accounts and net terms work at the counter
- !No real-time inventory plan; ask how stock stays accurate across yard and online
- !They hand-wave payments and PCI; ask exactly how processing and compliance are handled
- !No offline mode; ask what happens to the register when the network drops
- !They've only deployed Square setups; ask for a custom B2B-capable POS reference
If pos is on the roadmap, supply chain, business intelligence dashboards, booking & scheduling usually follow within the year. Budget them as one conversation.
Rohan advises mid-market and enterprise teams on ERP, CRM and custom software, and has led delivery on dozens of business-software builds.
Writes for Digital Heroes, shipping business software for 2,000+ brands across 55+ countries since 2017.
Frequently asked questions
Why can't Square or Clover handle our trade customers?
They're built for consumer retail and restaurants, where one customer type pays at checkout. They don't natively handle trade accounts, net terms, and tiered pricing at the counter. For a McKinney supply business serving contractors, that B2B workflow is exactly where generic POS forces you onto paper, which makes a custom register worth considering.
How does a custom POS keep inventory accurate?
It decrements stock in real time across every channel, counter, yard, and online, and integrates with your inventory management software so counts stay true. Off-the-shelf POS integrates at the surface and leaks across channels. Accurate multi-channel inventory is a primary reason to build, especially when you sell the same stock several ways.
What about payment processing and PCI compliance?
These are the genuinely hard parts of a custom POS. A responsible build uses a certified payment processor and keeps card data out of scope to simplify PCI, rather than handling cards directly. Ask any developer precisely how they handle processing and compliance, because shortcuts here create real liability.