Rent SaaS Monthly or Buy Software Outright? The 3–5 Year TCO Answer

For teams under 10 people, renting SaaS is usually cheaper and more flexible. But once a business holds 20–30 users or more for 3–5 years, buying wins on TCO: 30 people on a $12-per-user SaaS cost $21,600 over 5 years with nothing owned, while custom software from $10,000 plus 15–20% annual maintenance becomes your asset.

What is TCO, and why is comparing the first month's price a trap?

TCO (total cost of ownership) is everything a business actually pays to run a piece of software across its lifetime, not the introductory price on the pricing page. The formula, in plain words:

• SaaS TCO equals the fee per user per month × number of users × months of use, plus add-on fees for premium features, APIs, and storage.
• Buy-outright TCO equals the initial build cost, plus the annual maintenance fee (15–20% of contract value) × number of years.

The common mistake is weighing a small monthly SaaS fee against a one-time build investment while ignoring the two deciding variables: time and headcount. The comparison only makes sense projected across 3–5 years, the average lifespan an SME stays on one management system.

How large do SaaS subscriptions grow over time?

SaaS costs climb linearly with both people and months, and never stop. As an illustration: a management SaaS charging $12 per user per month for 30 staff costs $4,320 a year. After 3 years you have paid $12,960; after 5 years, $21,600. At the end of those 5 years the business owns no technology asset at all, and the moment you stop paying, you lose access to your own data.

Three add-on costs routinely missed in budgets:

• Tier upgrades: permissions and advanced reporting usually sit in plans priced 1.5–2 × the basic tier.
• Integration fees: API connections to accounting, e-commerce marketplaces, or a CRM are often billed separately.
• The headcount tax: every new hire automatically raises the software bill, whether or not they use any extra features.

What does buying outright cost, and what do you get?

Buying outright is a one-time investment in exchange for 100% ownership of the source code and data. Under FutureTech's published pricing: an MVP-level management app from $10,000 (6–10 weeks), mid-size systems at $30,000–100,000, and a custom ERP from $30,000 for the 3–5 module Starter package. Every figure derives from a single source, team rates equivalent to $10–18 per hour long term, so you can verify the math yourself. With a Vietnam-based delivery team, these rates sit among the lowest in the market at comparable quality: Singapore local agencies commonly charge S$90–150 per hour (≈$70–115), 4–6 × more.

Once live, your only recurring cost is maintenance at 15–20% of contract value per year. The decisive difference: that cost does not scale with headcount. Grow from 20 to 80 users and the software bill stays flat. The cost curve levels off, while the SaaS curve keeps climbing.

Where is the break-even point between renting and buying?

Break-even depends on 3 variables: user count, the SaaS unit price, and the upfront build investment. The table below runs the same 30-user scenario:

Scenario, 30 users	After 3 years	After 5 years
SaaS at $12 per user per month	$12,960	$21,600
Buy outright at $10,000 + 15–20% yearly maintenance	$14,500 – 16,000	$17,500 – 20,000

At 30 users the two curves cross around year 4. From then on, SaaS adds $4,320 every year while the owned system costs only $1,500–2,000 in maintenance. At 50+ users the crossover typically arrives before year 3. Conversely, a team under 10 people can rent SaaS for years without the accumulated fees reaching a custom build's price.

When should you choose SaaS, and when should you buy?

Choose SaaS when you need software running tomorrow, your team is under 10 people, budget is thin, and the business model is still shifting. At that stage, pay-as-you-go flexibility matters more than long-run optimization.

Choose to buy once operations have stabilized at 20–30 people, your workflows have genuine specifics that the software should follow rather than forcing staff to change habits to fit the tool, and leadership is committed to a 3–5 year horizon. To pick the right system structure, see custom ERP vs off-the-shelf ERP and how much a custom ERP costs for budgeting.

There is also a middle path worth weighing: FutureTech's free custom-configured ERP. You get the inventory, sales, and cash-flow modules to use immediately with no license fee and no per-user charges, and only pay when you commission additional custom features: as fast as SaaS, as fully owned as buying outright.

FAQ

Is there any case where renting SaaS stays cheaper than buying even after 5–10 years?

Yes, for micro-businesses under 5–10 people with no hiring plans. For example, 5 people × $12 per user per month is just $720 a year; even 10 years of that stays under the $10,000 entry price of a custom build.

Once I buy software outright, what do I still pay each year?

Maintenance at 15–20% of the contract value per year, covering security patches, bug fixes, and operational support. A $10,000 system runs about $1,500–2,000 a year, fixed regardless of user count.

At roughly what headcount does break-even occur?

There is no absolute number since SaaS unit prices vary, but at mainstream fee levels, 20–30 stable users over 3 years is where the curves start crossing; from 50 users, buying outright almost always wins.

We are on SaaS now. Can we switch to an owned system?

Yes, and it is common. Many SMEs treat SaaS as a 1–2 year trial, then export their data into a custom-built system once processes have matured. Data migration is handled as part of the build project.

Will the cost of owned software rise if I hire 50 more people?

No. Owned software carries no per-seat license fee: provision as many accounts as you like with no extra license cost; you only need server capacity to match.

Owning software only pays off if it is built well and secured properly. FutureTech is a Vietnam-based partner that builds for Singapore companies on Singapore hours in English, with committed deadlines, ISO 27001-certified information security, and full source-code ownership handed over on delivery.

Want to know which side of the break-even point your business sits on? FutureTech (ftech.ltd) offers a free scoping session and will run your 3–5 year TCO numbers with real data.

Reference pricing — an exact quote follows a free scoping session.