The verdict in three sentences
Fixed-price gives you a fixed budget and a guaranteed SLA; time-and-materials bills the actual work, more flexible but unpredictable. In 2026 in Berlin, fixed-price runs 8,000 to 25,000 MAD/month, time-and-materials 3,000 to 5,000 MAD/day, with a tipping point around 4 intervention days per month. The right choice depends on how volatile your needs are and your tolerance for budget risk.
Fixed-price vs time-and-materials: the decisive comparison
Fixed-price suits a stable application with predictable maintenance volume; time-and-materials suits an evolving application where the need swings sharply month to month.
| Criterion | Fixed-price | Time-and-materials |
|---|---|---|
| 2026 rate | 8,000 - 25,000 MAD/month | 3,000 - 5,000 MAD/day |
| Budget predictability | Excellent | Low |
| Guaranteed SLA | Yes, with penalties | Subject to availability |
| Over-consumption risk | Borne by the vendor | Borne by the client |
| Under-consumption risk | Borne by the client | None |
| Best for | Stable app, steady need | Evolving app, variable need |
The tipping point: below 4 intervention days per month, time-and-materials is cheaper; above it, fixed-price becomes cheaper and secures the SLA.
The clauses that truly protect the client
Beyond price, contract clauses make the difference: reversibility, code ownership and SLA penalties.
| Clause | What it guarantees | 2026 order of magnitude |
|---|---|---|
| Reversibility | Clean handover to another vendor | Documented, 3-10 days |
| Code ownership | Code is yours, repo accessible | Non-negotiable |
| SLA penalties | Invoice cut if deadline missed | 5-15% of monthly fee |
| Monthly reporting | Tickets handled, time consumed | Included |
| Evolutive cap | Limits non-corrective requests | 30-40% of the fee |
A maintenance contract with no reversibility clause or code ownership makes you captive: that's the first thing to lock down before signing.
Mini case study
Ms. Weber, CFO of a services SME in Berlin, is undecided about her HR management application. History: 3 to 6 intervention days per month, highly variable. On time-and-materials at 4,000 MAD/day, her busy months hit 24,000 MAD, unmanageable for her budget. She switches to a fixed-price at 16,000 MAD/month, D+2 SLA and 10% penalties. Over the year she pays 192,000 MAD instead of a 144,000-288,000 MAD range in time-and-materials, with full predictability and an enforceable SLA. Budget peace of mind easily justifies the slight premium.
Need a professional website?
Kolonell builds websites that attract clients, optimized for the Sénégalese market. Free quote in 2 minutes.
FAQ
From how many days does fixed-price become worthwhile?
Around 4 intervention days per month. Below that, time-and-materials is cheaper; above it, fixed-price caps spending and adds a guaranteed SLA, which time-and-materials doesn't offer.
Does fixed-price cover enhancements or just bugs?
Both, but the evolutive share is capped (often 30-40% of the fee). Beyond that, a heavy enhancement moves to project mode, billed separately.
What if I use less than the fixed fee?
You still pay the fee: that's the price of guaranteed availability and the SLA. If your needs are too small and irregular, time-and-materials fits better.
How do SLA penalties work?
If the vendor misses the contractual deadline, your monthly invoice is cut by 5 to 15%. That's what makes the SLA genuinely enforceable, not just stated.
Why demand a reversibility clause?
It guarantees you can switch vendors cleanly, with code and documentation transferred. Without it you become captive and any takeover costs 40% more.
Let's scope your project. Give us your monthly intervention volume and SLA need, and we'll propose fixed-price or time-and-materials with reversibility and code-ownership clauses. Detailed quote within 48 h. WhatsApp +221 77 596 93 33.
Mohamed Bah
Fondateur, Kolonell
Passionate about digital and entrepreneurship in Africa, Mohamed has been helping Sénégalese businesses with their digital transformation since 2020. Founder of Kolonell, he believes every SME deserves a professional and accessible online présence.
