Quick Answer: What an Access-to-Web Rebuild Costs
Rebuilding a Microsoft Access application as a web application is defined-scope, fixed-fee work with a knowable price: a focused rebuild of a single business-critical application typically runs between $50,000 and $85,000. Scope moves the number from there: fixed-fee project consulting for modernization initiatives ranges $55K-$450K depending on scope, and at regulated enterprises, smaller fixed-scope engagements (single application, bounded integration surface, single regulatory framework) typically run $150,000 to $500,000 once compliance evidence enters the scope. i3solutions, a Microsoft partner since 1997, prices this as custom application development with senior U.S.-based teams, and how the fee structures themselves work is compared in how Microsoft consulting engagements are billed.
The Five Drivers That Set the Price
Application complexity. The count of tables, forms, reports, and business rules is the first driver, because each rule has to be found, challenged, and reimplemented. A contact tracker and a quoting engine are different projects even when both are “one Access file.”
Data volume and cleanliness. Migrating clean, well-keyed data is cheap. Recovering integrity from years of free-text fields, duplicate keys, and orphaned rows is where budgets move.
Integration surface. Every system the application talks to (ERP, reporting, file shares, other databases) adds contract, testing, and cutover work. This is the driver that most often moves a rebuild out of the low end.
Undocumented logic. When the person who wrote the VBA is gone, the logic has to be recovered from the code and validated with the people who live with its results. The recovery effort scales the price more than any technology choice.
Compliance evidence. A commercial rebuild and a regulated rebuild of the same application are priced differently because the regulated one must produce audit evidence as a deliverable. This is why the regulated single-application band starts higher.
The target platform is a decision inside the engagement, not a separate bill: form-and-workflow workloads land on Power Apps with Dataverse, and genuinely custom workloads become an ASP.NET Core web application, as laid out in who rebuilds a failing Microsoft Access application.
Cost Tiers, From Focused to Enterprise
Focused single-department rebuild. One bounded application, few integrations, commercial compliance posture: a focused rebuild of a single business-critical application typically runs between $50,000 and $85,000. The decision framework for whether to rebuild at all, rather than repair, is covered in what to do when a Microsoft Access application is failing.
Regulated single application. Smaller fixed-scope engagements (single application, bounded integration surface, single regulatory framework) typically run $150,000 to $500,000.
Multi-system scope. Mid-sized engagements (custom application plus integration to two or three systems, multi-framework compliance) typically run $500,000 to $1,500,000. Most Access rebuilds do not start here, but an Access file that quietly became the department hub can.
Timeline. Microsoft modernization consulting engagements with i3solutions run from approximately four months for single-workstream scope to approximately twelve months for multi-workstream scope with significant compliance evidence requirements. A single-department Access rebuild usually sits at the short end.
What the Spend Returns
The cost question is really a comparison question: the rebuild is priced against the failure it retires. One rescued program for a nuclear operator saved about $293,000 a year and returned its full cost within three months, and one modernization retired about $500,000 a year in running cost. When the application carries a revenue-bearing process, the cost of the next corruption event, not the consulting fee, is usually the largest number in the business case.
Frequently Asked Questions
How much does it cost to rebuild a Microsoft Access application as a web app?
A focused rebuild of a single business-critical application typically runs between $50,000 and $85,000. The band widens with scope: fixed-fee project consulting for modernization initiatives ranges $55K-$450K, and smaller fixed-scope engagements at regulated enterprises (single application, bounded integration surface, single regulatory framework) typically run $150,000 to $500,000.
What moves an Access rebuild toward the low or high end?
Five drivers: application complexity (tables, forms, reports, business rules), data volume and cleanliness, how many other systems it integrates with, how much undocumented logic has to be recovered, and whether compliance evidence is a deliverable. Integration surface and logic recovery move budgets the most.
How long does an Access-to-web rebuild take?
Microsoft modernization consulting engagements with i3solutions run from approximately four months for single-workstream scope to approximately twelve months for multi-workstream scope with significant compliance evidence requirements. A single-department application usually sits at the short end.
Does the rebuild pay for itself?
When the application carries real operational load, yes, and measurably: one rescued program for a nuclear operator saved about $293,000 a year and returned its full cost within three months, and one modernization retired about $500,000 a year in running cost.
If you are budgeting a rebuild of an Access application your business depends on, a scoping conversation puts the drivers above against your actual system and returns a defined-scope number instead of a band. Schedule a Custom Application Development Discussion.
