Your online store's cash register is the virtual POS — pick the wrong one and it quietly skims a share of every sale. Yet most businesses choosing a virtual POS look only at the commission rate, then discover after signing the contract that valor period, provisioning approval rate, installment commissions, and chargeback processes all hit profitability just as directly. In this guide, instead of reducing the choice to a single percentage, we walk through 8 criteria that let you line up offers side by side and calculate the real cost.
1. Commission rate and hidden deductions
Commission matters, of course, but the "rates starting from 1.99%" line in a proposal is rarely what actually lands on your statement at month end. To see the real cost, calculate the effective cost instead of the headline rate: divide all deductions collected in a month (commission + fixed transaction fee + other items) by that month's revenue. A deal that looks like 1.99% can exceed 3% for stores with low basket sizes once a fixed fee of 1–2 TL per transaction is added.
Items you should ask about in writing at the proposal stage:
- Is there a fixed fee per transaction, and how much is it?
- Is a monthly fixed usage/package fee or minimum revenue commitment required?
- Is the commission refunded on returns and cancellations, or is the deduction permanent?
- Does the rate change for foreign cards and different card schemes?
- Are there integration, setup, or annual renewal fees?
The refund commission clause is especially critical: in categories where the return rate runs at 15–20% (clothing, footwear), never getting the commission back on a returned transaction turns into a significant expense line on an annual basis.
2. Settlement (valor) period
Valor is the time it takes for collected money to land in your account, and it sets the rhythm of your cash flow. The market ranges widely, from next-day payout to as long as 40 days; the general rule is that the shorter the valor, the higher the commission. Which point suits you depends on your business model: for a stocked business that pays suppliers upfront, a 30-day valor can be an expensive choice even at a low commission, because you end up covering that financing gap elsewhere — likely at a higher cost.
When comparing offers, run this calculation: the cost of the valor difference to you is the cost of the working-capital need created for as long as that money is tied up. For a store doing 1 million TL in monthly revenue, a 30-day valor means roughly 1 million TL is continuously parked in the system. For providers offering early payout (factoring-like) options, learn the extra deduction rate for that service up front — the need for early access to cash peaks exactly during campaign periods.
3. Installment options and commission table
In Turkey, installments are the hidden hero of conversion: as basket size rises, the preference for paying in installments rises noticeably, and a store that doesn't offer installments loses a significant share of high-basket sales from the start. But installments aren't free — a separate commission rate applies to each installment tier, and at 9–12 installments the total deduction can reach two to three times that of a single payment.
Look at three points when evaluating:
- The number of card programs the provider has agreements with: the more bank card programs (bonus, points, and installment programs) it partners with, the wider the customer base you can offer installments to,
- Transparency of the installment commission table: request the up-to-date table with tier-by-tier rates in writing and have it attached to the contract,
- Product- or category-level installment control: being able to turn off installments on low-margin products and enable them on high-margin ones is the most practical way to manage installment cost. Regulations also impose installment limits on certain categories (e.g. mobile phones, jewelry); your infrastructure needs to apply these rules automatically.
Passing the installment commission on to price (deferred-payment surcharge) is also an option; but if you do this, showing amounts clearly and honestly on the checkout page is always better for conversion than a surprise cost.
4. Provisioning (successful transaction) rate
This is the least-discussed criterion, yet the one that affects your revenue most directly. The provisioning rate shows what share of payment attempts get approved. A 2–3 point gap in approval rate between two providers wipes out every commission difference on paper: going from 90% to 93% approval means an extra 30,000 TL collected on 1 million TL in monthly attempts.
Factors that affect the approval rate include the quality of the provider's direct connections with banks, smart transaction routing (automatically retrying a declined transaction through another channel), and how adjustable overly strict fraud rules are. At the proposal stage, ask the provider for the average approval rate in your specific sector, and track this metric weekly once you go live. A sudden drop in approval rate is often an infrastructure signal that needs to be caught before customer complaints start coming in.
One more detail: you need access to the reasons behind declined transactions. When you can see the breakdown of decline codes — "insufficient limit," "card blocked," "bank unreachable" — you can tell whether the problem lies with you, the provider, or the customer profile. With a provider that doesn't report decline reasons, this analysis is done blindly and lost revenue stays invisible.
5. 3D Secure and fraud protection
3D Secure confirms a transaction with verification sent to the cardholder's phone and largely shifts fraud-related chargeback risk to the bank. It's strong on security; but like any extra step, it takes a toll on conversion: some customers give up waiting for the SMS, enter the code wrong, or their bank simply can't send verification at that moment.
A good provider should offer you a dual structure: mandatory 3D on risky transactions, a 3D-free flow on low-risk ones (recognized customer, low amount, consistent behavior). Beyond that, question the provider's own fraud layer: can you define velocity rules (too many attempts from the same card in a short time), blacklist management, and BIN- or geography-based rules? It matters that these rules can be managed from a panel that's transparent to you — having to open a support ticket for every rule change is an unacceptable delay on campaign days.
6. Integration ease and infrastructure compatibility
The quality of the technical integration determines both your launch time and your maintenance burden in the years that follow. When evaluating, look at how up to date the documentation is, whether the test (sandbox) environment covers real-world scenarios, and how clear the error messages are. There's a world of difference — in terms of customer-service load — between a system that just says "transaction failed" and one that says "insufficient card limit, show the customer this message."
The biggest accelerator is having your e-commerce platform come with ready-made integration to the provider: instead of weeks of development, you can go live by entering an API key from the panel. Also verify that capabilities like stored-card (tokenization), one-click payment, partial refunds, and recurring payments are supported on the infrastructure side. You can see Şimşek Software's ready virtual POS integrations on our ecosystem page; it's also possible to work with multiple providers at once and route transactions by rule.
7. Refund, cancellation, and chargeback processes
A sale's unhappy scenario needs to run just as smoothly as its happy one. Clarify three distinct processes: same-day cancellation (reversing a transaction before the money is actually captured), refund (a captured amount going back to the card), and chargeback (the customer disputing the transaction through their bank).
On the refund side, your questions should be: is partial refund supported, how many days until the refund reflects on the card, and is the refund processed from the panel or via a support request? On the chargeback side, what matters is how quickly the provider notifies you of a dispute and how many days you're given to respond. Merchants who can quickly submit evidence such as shipping delivery proof, order logs, and 3D verification records win a significant share of chargeback disputes. If your chargeback rate rises above certain thresholds, make sure to read what sanctions the provider will apply (increased collateral, account suspension) in the contract.
8. Reporting and reconciliation
If "the money that landed in the bank account" doesn't match "the sales shown in the panel" at month end, the hours you spend finding the difference are a real cost. A good provider offers a daily reconciliation file with transaction-level deduction detail (commission, installment difference, refunds, chargebacks) and lets you feed this data into your accounting system via API.
On the reporting side, look for: end-of-day summaries, installment distribution, approval rate trends, bank-by-bank performance, and refund/chargeback reports. If you work with multiple stores or channels, it also matters that reports can be broken down by store. Having this data automatically match your e-commerce panel keeps your accounting team from having to close out every month in a spreadsheet.
Bank POS or payment institution?
In Turkey there are two main routes: virtual POS accounts taken directly from banks, and licensed payment institutions (PSPs). Both have legitimate use cases; the difference becomes clear based on your priorities:
| Criterion | Bank virtual POS | Payment institution (PSP) |
|---|---|---|
| Application and onboarding | Longer; bank evaluation and often a revenue/collateral requirement | Usually a few days; online application |
| Commission | Can be negotiated lower at high volumes | Generally more predictable package rates upfront |
| Installment coverage | Only that bank's card program; wide coverage requires many bank agreements | Multi-bank installments with a single integration |
| Valor | Negotiable with the bank; held/blocked models are common | Usually next day / a few days; early payout option available |
| Technical integration | Separate integration and maintenance per bank | A single API, a single panel |
| Best fit | High-revenue businesses with negotiating leverage | New businesses that want to launch quickly |
In practice, most mature businesses evolve toward a hybrid model: main volume runs through negotiated bank POS accounts, while a payment institution stays active as a backup channel and for broader installment coverage. If your infrastructure supports multi-POS routing, you can also automatically distribute transactions by commission and approval rate.
"The most expensive virtual POS isn't the one with the highest commission — it's the one that quietly erodes your revenue with transactions it never approves."
Conclusion
A sound virtual POS choice isn't made by reading a single rate but by weighing eight items together: effective commission, valor, installment table, approval rate, security layer, integration quality, refund/chargeback processes, and reconciliation setup. Get written proposals from at least two providers, calculate the annual total cost against your actual order mix (average basket, installment ratio, return rate), and decide based on that table. For growing businesses, repeating this evaluation once a year is often the shortest path to coming back to the negotiating table with leverage.
Quick checklist
- Have you calculated the effective cost (all deductions / revenue) per proposal?
- Have you confirmed in writing whether the commission is refunded on returned transactions?
- Have you worked out the monthly cost of the valor period to your cash flow?
- Is the tier-by-tier installment commission table attached to the contract?
- Have you asked the provider for the average approval rate in your sector?
- Can the 3D/non-3D flow and fraud rules be managed from a panel?
- Are chargeback notification and defense timelines clear in the contract?
- Does a daily reconciliation file flow automatically into your accounting?
Auditing these criteria one by one may seem like a chore; but with the right infrastructure, the technical side of it is lifted off your shoulders. Şimşek Software offers ready virtual POS integrations with Turkey's leading banks and payment institutions, multi-POS routing, and automatic reconciliation support; you can find answers to frequently asked integration questions on our FAQ page. Take a look at our solutions to stop your payment infrastructure from being an obstacle in front of your sales, and request a demo to test it with your own scenarios.