The verdict in three sentences
For a custom business app in Dublin in 2026, a freelance developer at EUR 500 to 700 a day quotes 20 to 40 % less than an agency. That low price is paid for in bus factor (one person holds all the knowledge), often thinner testing and documentation, and service continuity. If the app is critical to your business, compare the 3-year total cost, including EUR 600 to 1,800 a month of support and maintenance, not just the initial quote.
Compare like with like
An SME owner gets two quotes for the same operations app (scheduling, field jobs, invoicing): EUR 45,000 from a freelancer, EUR 65,000 from an agency. The EUR 20,000 gap is rarely margin alone. It reflects items the freelancer does not always include: project manager, UX design, automated tests, formal acceptance testing, documentation, a staging environment.
| Criterion | Freelance developer | Development agency |
|---|---|---|
| 2026 day rate in Dublin | EUR 500 to 700 | EUR 700 to 1,000 (blended) |
| Typical business app quote | EUR 35,000 to 55,000 | EUR 55,000 to 85,000 |
| Delivery timeline | 4 to 6 months (one person) | 3 to 4 months (team of 3 to 4) |
| Bus factor | 1 | 2 to 4 people know the code |
| Automated tests | Variable, often under 30 % coverage | Contractual 60 to 80 % coverage |
| Documentation | Minimal | Technical and user docs delivered |
| Professional indemnity cover | EUR 0.5 to 1 M | EUR 1 to 5 M |
Four risks to lock down in the contract
Bus factor. If your freelancer falls ill, takes a permanent job or starts a long contract at a big tech firm, your app is orphaned. Require the code in a Git repository you own and access to all infrastructure.
Code ownership. Under Irish copyright law, a contractor generally keeps copyright unless there is a written assignment. A full IP assignment clause belongs in the contract, with a freelancer or an agency alike.
Tests and documentation. An app without tests costs 20 to 30 % more to evolve. Set a minimum coverage rate and documentation deliverables in the contract.
Support and maintenance. Ongoing maintenance covers fixes, security updates and small changes. Price it from day one.
| 3-year cost item | Freelancer | Agency |
|---|---|---|
| Initial build | EUR 45,000 | EUR 65,000 |
| Monthly maintenance | EUR 600 to 950 | EUR 1,100 to 1,800 |
| Maintenance over 36 months (mid-range) | EUR 27,900 | EUR 52,200 |
| Code takeover if the provider leaves | EUR 10,000 to 18,000 (30 % probability) | Low, team in place |
| Estimated outage cost (5 days down) | EUR 12,000 (25 % probability) | EUR 3,000 (10 % probability) |
| Weighted 3-year total | about EUR 80,100 | about EUR 117,500 |
When to choose which
A freelancer is an excellent choice for a non-critical internal tool, a prototype or validation MVP, a budget under EUR 35,000, or if you have a CTO able to steer and review the code. An agency is justified when the app carries revenue, handles sensitive data, must ship in under 4 months or evolve over several years. A middle path exists: a senior freelancer under a strict contract (Git repo, IP assignment, tests, documentation) plus a second developer reviewing a few days a month.
Mini case study
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Aoife, managing director of a 45-person industrial maintenance SME in Dublin, wants to replace scheduling spreadsheets with an app. Each day the tool is down blocks 12 technicians and costs about EUR 5,800 of revenue. The freelancer quotes EUR 45,000, the agency EUR 65,000. Factoring in outage risk (25 % chance of 5 days down with the freelancer, EUR 7,250 expected, versus 10 % with the agency, EUR 2,900) and a possible code takeover (30 % chance, about EUR 4,200 expected), the gap on build and risk shrinks to about EUR 11,500. She picks the agency because the tool drives 100 % of her field operations, but negotiates maintenance at EUR 1,200 a month.
FAQ
What is a freelance developer's day rate in Dublin in 2026?
Between EUR 500 and 700 a day for an experienced full-stack web developer. Specialised senior profiles exceed EUR 750.
Why is an agency 20 to 40 % more expensive?
It includes project management, design, testing, acceptance and team continuity. These items usually make up 25 to 35 % of the budget.
How do I secure code ownership?
With a written IP assignment clause and a Git repository in your name from day one. Without written assignment, the contractor generally keeps the copyright.
How much does maintenance cost for a business app?
EUR 600 to 1,800 a month depending on change volume and guaranteed response time. A 4 business-hour SLA sits at the top of the range.
How long does a business app take?
Three to 6 months: 3 to 4 months with an agency team, 4 to 6 months with a solo freelancer.
Let's scope your project. Send us your requirements and, if you have one, a freelancer's quote, and we will return a line-by-line comparable estimate between EUR 50,000 and 85,000 with a 3 to 4 month plan. 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.
