Why accessibility by design costs less than late compliance

The most common objection to accessibility is still cost. It rests on a timing error: accessibility is expensive when it is dealt with late, not by nature.

The cost of late remediation

Reworking a service already in production to make it accessible means revisiting structural choices, sometimes entire components, without being able to change the underlying architecture without redoing everything.

The cost of accessible design

Built in from the framing stage, the cost of accessibility largely merges with the normal cost of design: choosing a semantic HTML structure, compliant contrast and consistent keyboard navigation costs almost nothing extra if it is done from the start.

A simple line of reasoning to present to a steering committee

• Fixing an accessible component once, before rollout: marginal cost
• Fixing the same component after rollout on the 50 screens that use it: multiplied cost
• Never fixing it: legal risks for private companies and exclusion of some users

A scenario a committee can put figures on

Take a form component reused across ten user journeys in the same product. Designing it to be accessible from the start adds a few hours of specification and testing when it is created, a cost that disappears into the normal design budget. Fixing it afterwards means reopening ten journeys that have already been delivered and tested, often maintained by different teams, with the risk of introducing a regression on each one. Even with a rough valuation of the human time involved, the gap easily runs to several multiples of the initial cost, before even adding the risk of litigation linked to late compliance.

It is this argument, more telling than an abstract percentage, that I present to steering committees: not "accessibility costs 3 times less" in absolute terms, but "here is what this specific component would cost you to rework, compared with what it would have cost to get right from the start". It is this component-by-component costing that I build in my accessibility work.

A costing model for deciding early

I never give a universal ratio, because no reliable one exists: the gap depends on the number of screens affected, the debt already accumulated and how the teams are organised. What I provide is a template that the committee fills in with its own figures.

Component	Screens concerned (n)	Cost at design stage	Cost of rework
Form field	n journeys	1 specification + 1 round of tests	n reworks + n acceptance tests + coordination between teams
Modal	n screens	1 development of the keyboard pattern	n integrations to find, fix and retest
Button or link	n occurrences	1 colour token, 1 labelling rule	n occurrences to fix, often with local variants
Page template	all pages	1 structure of headings and landmarks	rework of the template, then page-by-page checking

The "cost at design stage" column is paid once. The "cost of rework" column is multiplied by n, and n only keeps growing as long as the faulty component stays in circulation. It is this asymmetry, not a percentage, that wins the decision.

What non-compliance costs: penalties and obligations

The legal risk is real, but it has to be described accurately, without exaggerating it. Article 47 of the law of 11 February 2005 imposes accessibility on public bodies, on their public service delegates and on companies whose turnover in France exceeds 250 million euros, averaged over the last three financial years (article 2 of decree no. 2019-768). For these organisations, article 47-1 allows Arcom (the French audiovisual and digital communication regulator) to impose a financial penalty capped at 50,000 euros for an inaccessible service, and at 25,000 euros for the absence of an accessibility statement, a multi-year plan or a conformity notice on the home page.

An SME is therefore not exposed to these amounts under article 47. It may be exposed under another text: the European Accessibility Act (EU directive 2019/882) has applied since 28 June 2025 to certain products and services, including e-commerce, banking, transport and telephony, with exemptions for the smallest businesses. Enforcement then falls to other authorities, notably the DGCCRF (French consumer protection authority), and not to Arcom under the RGAA. To find out which of the two regimes applies to you, the RGAA scope diagnostic pinpoints your obligation in a few questions.

In both cases, the fine is rarely the heaviest item. The real cost of compliance forced on you is the emergency rework, under time pressure, of a product that could have been well designed in the first place.

Making accessibility a framing requirement

The cheapest moment to deal with accessibility is not design, it is framing. A requirement missing from the specifications is neither costed, nor planned, nor tested during acceptance: it resurfaces later as a defect, at the worst possible moment. This is the mechanism I describe in framing debt costs more than technical debt.

In practice, three lines are enough in a framing document: the target standard (RGAA 4.1.2), the level expected at delivery, and how it will be verified (criteria tested during acceptance, audit before go-live). These three lines turn accessibility from a diffuse risk into a measurable requirement, which the team can estimate like any other.

Accessibility is not a cost you can avoid, only a cost you can choose to pay early and once, or late and several times.

This is the reasoning I present to steering committees during an RGAA audit: the cost of accessibility never disappears, it is chosen.

Further reading: RGAA: the errors that come up in 9 audits out of 10

Frequently asked questions

Does accessibility by design really cost less?

Yes, on reused components: you design them once, whereas late rework is repeated on every screen that uses them. The exact gap depends on the product, which is why I cost it component by component rather than with a general ratio.

What is the penalty for RGAA non-compliance?

For organisations covered by article 47 of the 2005 law, including companies with more than 250 million euros of turnover in France, Arcom can impose up to 50,000 euros for an inaccessible service and 25,000 euros for a missing statement or plan.

Does the RGAA apply to an SME?

Generally not under article 47, unless it is delegated a public service mission or depends on a public body. It may, however, fall under the European Accessibility Act if it sells certain products or services, such as online retail.