Replacing an Access Database with a Web App: Cost and Plan (2026)

The verdict in three sentences

An Access database from 2009 combined with around thirty Excel files is no longer a tool, it is a dependency on one or two people and one specific Windows machine. For a company with 20 to 150 employees, replacing it with a custom web application costs between USD 20,000 and 50,000 (EUR 18,000 to 45,000) in 2026, depending on the number of tables, business rules and user roles. The project ships in 2 to 4 months and usually pays back in under 24 to 30 months thanks to about one day per week recovered from re-keying and manual checks.

Why Access and Excel became a risk in 2026

Every operations director knows the symptoms: the database corrupts when two people open it at the same time, VBA macros break with each Office update, and "V3_final_new" spreadsheets contradict each other. The real danger lies elsewhere: business rules (discount calculations, reminders, schedules, contract tracking) are documented nowhere except in VBA code and in the head of the person who built the tool.

A web application centralises data in a PostgreSQL database hosted in your region, handles concurrent access, logs who changes what and makes the tool available from any desktop or phone, with role-based permissions.

What the migration costs in 2026

The budget depends less on the number of screens than on the complexity of the business rules and the quality of existing data. Here are 2026 ballpark figures for an SME.

The most underestimated phase is data migration: a 15-year-old Access database commonly holds 10 to 20 % duplicate customers, text fields containing dates and amounts typed in inconsistent formats. An initial 3 to 5-day audit (USD 2,700 to 4,400, EUR 2,500 to 4,000, deductible from the project) lets you price the rest precisely.

The method that avoids the black box

• Audit: review of tables, queries and VBA code, interviews with 3 to 5 users, inventory of the 30 spreadsheets and of those really in use.
• Business rules map: every calculation is written down and signed off by the business before development.
• Releases every 2 weeks: a usable module each time, tested on real anonymised data.
• Parallel run of 2 to 4 weeks: Access stays read-only while the team works in the new application.
• Go-live and training: half a day per role, user guide and short videos.

Mini case study

Rachel, operations director of an industrial maintenance company with 60 employees, manages contracts, jobs and invoicing with a 2009 Access database and 30 spreadsheets. Three people each spend about 8 hours a week re-keying and checking data, 24 hours weekly in total.

The chosen project costs USD 35,000 (EUR 32,000) plus USD 130/month hosting and USD 550/month maintenance. After go-live, re-keying drops to 16 hours a week: 8 hours saved, one full day. At a loaded cost of USD 42/hour, the gain reaches 8 x 42 x 46 weeks = USD 15,456 per year. Adding about USD 6,500/year of avoided invoicing errors, the annual gain approaches USD 22,000 against USD 8,160 of recurring costs. Payback lands around 26 months, after which the tool delivers about USD 13,800 net per year.

FAQ

Can all the Access data be migrated?

Yes, in 95 % of cases. Tables are exported, cleansed and imported with consistency checks; only unusable fields (free text mixing dates and amounts) need a business decision, typically on 2 to 5 % of records.

Do VBA macros have to be rewritten one-for-one?

No. We rebuild the business rule, not the code. In practice, 20 to 30 % of existing macros are no longer used and are not redeveloped, which lowers the budget.

Where is the data hosted?

In the region you choose (EU or US) with a provider such as OVHcloud, AWS or Scaleway, for USD 55 to 220 (EUR 50 to 200) a month depending on volume. Daily backups are kept for 30 days and you own both the code and the data.

Can we keep Excel for some uses?

Yes. The application offers one-click Excel exports and can import files in a defined format, which reassures spreadsheet-minded teams during the first 2 to 3 months.

Is there public funding for this kind of project?

Depending on the country, SME digitalisation grants or vouchers can cover part of the audit or development; amounts vary with the programmes open in 2026, so check them before signing.

Let's scope your project. Send us the list of your Access tables and spreadsheets: we price the migration, with a 2 to 4-month plan. Detailed quote within 48 h. WhatsApp +221 77 596 93 33.