SaaS vs. Traditional Software: Calculating the Real Five-Year Cost

Consider a mid-sized manufacturing firm evaluating a new accounting software purchase. The vendor presents two options: a one-time license fee with annual maintenance, or a fixed monthly subscription. At first glance, the subscription looks expensive because money goes out every month. With the license model, you pay once and you ‘own’ the software. But this comparison is incomplete — and that gap is exactly what leads most SME managers to miscalculate their software budgets.

Total cost of ownership (TCO) looks beyond the license or subscription price to every lira spent making the software work and keeping it working. In the traditional license model, many of these costs are invisible at the point of purchase and surface later, sometimes unexpectedly. In the subscription model, the cost structure is more predictable, but without careful tracking the total can exceed initial estimates.

Building a five-year comparison framework requires examining four main cost categories. The first is direct software cost: in the traditional model, this means the upfront license fee plus annual maintenance and upgrade charges, typically between fifteen and twenty-five percent of the original license price each year; in the subscription model, it means the fixed monthly or annual fee. The second category is infrastructure and setup: in the traditional model, this includes server hardware, operating system licenses, database licenses, and the service fees paid for installation and configuration. In the subscription model, these items largely disappear because the software runs on the vendor’s servers and access is provided through a browser or client application.

The third category is integration and customization. In both models, migrating existing accounting data to the new system, establishing data exchange with other applications, and configuring company-specific reports all require consulting and development work. This cost is independent of the delivery model and typically represents a significant portion of the project budget. That said, subscription vendors often include broader standard setup packages, which can reduce customization needs in some cases. The fourth category is training and productivity loss: the time employees spend learning the new system, the drop in output during that adjustment period, and the direct cost of training services. This item rarely appears in budget proposals, yet for a five-person accounting team, a two-week adaptation period represents a real and measurable cost.

To make the five-year calculation concrete, consider a typical scenario. A fifty-person manufacturing firm is looking for accounting and inventory management software for ten users. In the traditional license model, the upfront license fee, server and installation costs, and first-year training and consulting fees combine to produce a high initial outlay. From the second year onward, annual maintenance charges and occasional upgrade or add-on module fees continue to accumulate. In the subscription model, first-year spending starts lower, but by the end of year five, the cumulative subscription payments can approach or exceed what the license model would have cost. Which option is more advantageous depends on the company’s cash flow preferences and how many years it plans to use the system.

The least discussed cost in the subscription model is the exit cost. If five years from now the company wants to switch to a different solution, extracting data from the current system, migrating it to the new one, and managing the risk of data loss takes time and money that adds up quickly. The traditional model presents a similar challenge, but since data typically resides on your own servers, access tends to be more straightforward. With a subscription model, it is essential to clarify during contract negotiations where data is stored, in what formats it can be exported, and what happens when the contract ends.

For an SME manager, the decision should rest on answers to three questions. First, how fast will the company grow over the next five years, and how will the number of users change? Since subscription pricing is commonly per-user, a growing team can push total costs up quickly. Second, what is the company’s current IT infrastructure and internal technical support capacity? If there are no internal resources to manage servers, the hidden costs of the traditional model rise considerably. Third, how much customization does the software require? A firm whose processes closely match standard workflows will benefit more easily from the subscription model; a firm with heavy customization needs may find greater control in the traditional approach. Any cost comparison made without answering these three questions leaves too much on the table.

This article was originally written in Turkish by Gökhan MERCANOĞLU on June 26, 2006 and has been automatically translated into English and other languages using machine translation.


The first gain in exit strategy investments is usually visibility. The company starts to see where it slows down, which information is missing, and which decisions are delayed. This visibility may be uncomfortable, but it is the strongest starting point for sustainable improvement.


Gökhan Mercanoğlu
Bulut, SaaS ve Platform Ekonomisi