At your Derry till a Donegal day-tripper hands over euro, the next customer pays sterling, and Square calls one of them foreign
A custom POS system for a Derry business costs $35k to $95k over 3 to 6 months. You build beyond Square, Toast, Clover or Lightspeed when a single till genuinely takes both sterling and euro all day, locals in pounds, tourists and Donegal visitors in euro, and you need both handled as native, not one treated as an awkward foreign payment with a poor rate and messy reconciliation.
Square, Toast and Clover are built around one home currency. In Derry, a till in a shop, cafe or visitor attraction takes sterling from locals and euro from Donegal visitors and tourists in the same hour. Off-the-shelf POS treats one of those as foreign: an awkward conversion, a rate that isn't yours, and an end-of-day reconciliation where the euro takings sit in a separate, badly-handled pile.
For tourism and hospitality especially, that friction is at the worst possible moment, the point of sale. A visitor who wants to pay in euro gets a clunky experience, the staff member fumbles the conversion, and the takings report doesn't cleanly separate what came in as sterling versus euro. Multiply that across a busy tourist season and the reconciliation alone is costing real time and accuracy.
Where the off-the-shelf tools fall short
- Euro takings treated as foreign payments with a poor rate and clumsy handling at the till
- End-of-day reconciliation where sterling and euro takings don't separate cleanly
- Staff fumbling manual conversions during a rush, slowing the queue and making errors
- No clean view of how much revenue came in each currency across a tourist season
Custom pos: what Derry teams actually get
A custom POS treats sterling and euro as equal citizens at the till: either is a one-tap native payment, the rate is yours, and the day's takings separate cleanly by currency for reconciliation. For a Derry tourism, hospitality or retail business serving locals and cross-border visitors in the same queue, that removes the friction at the exact moment it costs most, the point of sale, and gives you an honest, currency-split view of the season's revenue.
- One till genuinely takes both sterling and euro all day and the current POS treats one as foreign
- Reconciliation of mixed-currency takings is eating staff time and causing errors
- Tourist-season queues slow down because of manual conversions
- You need a true currency-split view of revenue your packaged POS can't give
- Your till is effectively single-currency and a packaged POS fits
- You want plug-and-play hardware and vendor support with no integration work
- Card-processing compliance is something you'd rather a vendor own entirely
- You need to be trading quickly with minimal setup
- Sterling and euro both handled as native one-tap payments, with the rate you set, not a default foreign rate
- End-of-day reconciliation that separates GBP and EUR takings cleanly, saving time and errors
- Faster queues because staff aren't fumbling manual conversions during a tourist rush
- An honest, currency-split view of revenue across the tourist season for real decisions
- Integration with your inventory management software, accounting software and booking software so sales, stock and tax stay aligned
- Payment-hardware certification and card-processing compliance add real cost and time to a POS build
- You take on PCI and payment-security responsibility a packaged POS handles for you
- You lose the plug-and-play hardware and support ecosystem Square and Toast provide
- For a single-currency till, Square or Lightspeed is cheaper, faster and entirely sufficient
Feature priorities for Derry teams
Derry POS: the full scope
Everything a POS build here can cover: custom POS system, point of sale software, retail POS, restaurant POS, Square alternative, Toast alternative and Clover.
The honest cost picture for Derry
| Project scope | Typical cost | Timeline |
|---|---|---|
| Dual-currency POS core | $35k to $55k | 3 to 4 months |
| Full POS with hardware, reconciliation and reporting | $60k to $95k | 5 to 6 months |
| Dual-currency layer over an existing POS | $18k to $32k | 6 to 9 weeks |
Timeline: what happens, and when
Exactly what you get
You get a till that doesn't blink at either currency. A local pays in sterling, a Donegal visitor pays in euro, both are one-tap native payments at the rate you set, and the day's takings split cleanly by currency for reconciliation. Queues stay fast through the tourist rush because nobody is converting by hand. It stays in sync with your inventory management software, accounting software and booking software so sales, stock and tax line up.
How to choose a developer in Derry
Ask to see how they'd handle a queue where every other customer pays in a different currency, and how the day reconciles afterward. A developer who understands Derry's tourism and cross-border retail will treat dual currency as the core, not a foreign-payment afterthought. Press on PCI and payment security, and ask for a POS or payment system they've shipped that handled real card processing.
- !They treat euro as a foreign payment. Ask how both currencies are native one-tap at the till
- !No reconciliation plan. Ask how the day's sterling and euro takings separate cleanly
- !Vague on PCI and payment security. Ask how card-processing compliance is handled in a custom POS
- !No tourist-rush thinking. Ask how the till stays fast when staff can't stop to convert
- !No integration with stock and accounts. Ask how sales and tax stay aligned across systems
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
Can't Square or Toast just take euro payments?
They can process a foreign payment, but they treat it as foreign: an awkward conversion, a default rate that isn't yours, and takings that don't separate cleanly at end of day. For a Derry till taking both currencies all day, that friction and reconciliation mess is exactly what a custom POS removes.
How does a dual-currency POS handle reconciliation?
It records each sale in its native currency and the rate you set, then separates sterling and euro takings cleanly at end of day. You get an honest currency-split report instead of a single pile that someone has to untangle, which matters most across a busy tourist season.
What about payment security and PCI compliance?
A custom POS that processes cards must meet PCI and payment-security requirements, which is part of the build and cost. A competent developer designs for this from the start; it's also a reason to scope carefully, since packaged POS systems own this for you.
What does a custom POS cost in Derry?
A dual-currency POS core runs $35k to $55k over 3 to 4 months. A full system with hardware, reconciliation and reporting runs $60k to $95k over 5 to 6 months. A dual-currency layer over an existing POS is $18k to $32k.
Will it connect to our stock and accounts?
Yes. The POS should integrate with your inventory management software, accounting software and booking software so a sale updates stock, the takings flow to the accounts in the right currency, and tourism bookings and walk-in sales share one picture.