The Question Every Business Owner Asks
You need a website. Or your current one needs serious work. You get a few quotes and quickly discover there are two fundamentally different ways to pay for web design: a one-off project fee, or a monthly retainer.
On the surface, the project-based model looks cheaper. You pay once, you own the site, done. But that framing misses most of what actually happens after launch.
This post breaks down both models honestly, including the costs most agencies don't mention upfront.
What Project-Based Web Design Actually Costs
A one-off project typically works like this: you brief an agency or freelancer, they build the site, you pay the invoice. In the UK, a professionally built website for a small business runs anywhere from £2,000 to £10,000+, depending on scope and who you hire.
That sounds straightforward. But the project fee rarely covers:
- Ongoing hosting and infrastructure (usually £20-100/month added separately)
- Security updates and CMS maintenance (WordPress sites need constant patching, or they get compromised)
- Content updates after launch (most agencies charge hourly, often £60-100/hour)
- Bug fixes when something breaks six months in
- A redesign when the site starts looking dated in two to three years
A £3,500 site in year one can easily cost £5,000-6,000 by the end of year two once you factor in hosting, maintenance, and ad-hoc updates. And that's assuming nothing goes wrong.
What a Monthly Web Design Retainer Includes
A web design retainer, or subscription model, works differently. You pay a fixed monthly fee and in return get an ongoing design and development service: updates, improvements, maintenance, and support, all included.
At TsvWeb, our retainer covers:
- Custom-designed and built website
- Hosting on fast, reliable infrastructure
- Unlimited content and design updates
- Technical maintenance and security
- Ongoing SEO improvements
- Priority support
The monthly cost is predictable. There are no surprise invoices when you need a new page added or when something needs fixing.
The Real Total Cost Comparison
Here is a realistic five-year comparison for a small business website:
Project-based model:
- Year 1: £4,000 build + £600 hosting/maintenance = £4,600
- Year 2: £600 hosting + £800 ad-hoc updates = £1,400
- Year 3: £600 hosting + £500 updates + £1,500 partial redesign = £2,600
- Year 4: £600 hosting + £400 updates = £1,000
- Year 5: £600 hosting + £3,500 full redesign = £4,100
- Five-year total: roughly £13,700
Monthly retainer at £299/month:
- Five-year total: £17,940
So project-based wins on raw cost, right? Not quite.
The retainer includes ongoing improvements, not just maintenance. A site on a retainer gets better over time: new sections added as the business grows, copy refined based on what converts, design updated as trends shift. The project-based site gets a redesign every few years and sits static in between.
More importantly, the retainer gives you a team. Every time you need something changed, it happens. There are no quotes to approve, no waiting to find a freelancer, no sticker shock when the invoice arrives.
Which Model Suits Which Business
Project-based makes sense when:
- You have a clear, fixed scope and the budget to cover it upfront
- You have in-house technical resource to handle maintenance
- You genuinely don't anticipate needing updates or support after launch
A retainer makes sense when:
- You want your website to actively improve over time, not just exist
- You don't have an in-house developer and don't want the overhead of finding one
- You need to plan your costs and hate unpredictable invoices
- Your website is central to how you generate business
For most small businesses in the UK, the retainer model is lower friction and often lower risk. The upfront investment is spread out, the ongoing relationship means your site is never neglected, and you always have someone to call.
The Hidden Cost Nobody Talks About: Neglect
There is a cost that doesn't appear in any spreadsheet but is probably the most expensive one: the cost of a site that gets built and then ignored.
Most project-based websites quietly deteriorate. The copy is out of date. The offers no longer reflect what the business actually sells. The design ages. The plugins go unpatched. The business owner knows it needs work but never quite prioritises the update because it means another invoice, another briefing process, another project.
A retainer removes that friction. Changes happen because they're included. Your site stays current because there's a team actively responsible for it.
What TsvWeb's Subscription Model Looks Like in Practice
We work on a retainer basis. Every client gets a custom-built site, designed around their brand and goals, maintained and improved on an ongoing basis.
When you need a new service page, we build it. When you want to test a new headline, we change it. When Google's algorithm shifts and your page structure needs updating, we handle it.
There are no surprise costs. No hunting for developers. No "that's out of scope" conversations.
The result is a website that genuinely works as a business tool, not a one-off deliverable that slowly becomes a liability.
Ready to Switch Models?
If you're tired of unpredictable web costs or a site that no longer reflects what your business actually does, our subscription model is worth a conversation.
Get started with TsvWeb and we'll put together a proposal based on your specific needs.