Verified client
Our team was manually exporting and re-entering data between Access and Outlook every single day. Their VBA programmer automated the entire workflow in about two weeks. We got back roughly 8 hours a week almost immediately.
Microsoft Access Services
Access Database Modernization Services for Legacy Systems
Is your Access database crashing after Windows updates, slowing down as data grows, or running on a version Microsoft no longer patches? We modernize (modernise) Microsoft Access applications for U.S. businesses: .mdb to .accdb upgrades, SQL Server and Azure SQL migration, and VBA fixes, while keeping the forms and reports your team already knows. Fixed scope, from $1,200.
Verified client
We had them do a complete rewrite of an Excel spreadsheet that locked up computers, when it was executed. Rajan did a good job of rewriting the spreadsheet and speeding it up. it takes three seconds to refresh compared to 20 minutes it was taking earlier. We'll definitely use Rajan and his team in the future.
1 / 4
Quick Answer
Access database modernization is the work of bringing an older Microsoft Access application up to date so it runs reliably on current Windows and Microsoft 365: converting the file format, splitting or moving the data to SQL Server or Azure SQL, fixing VBA that breaks on 64-bit Office, and tightening security, without losing the business logic your team depends on.
Typical cost: fixed-scope projects start at $1,200. Typical time: 1 to 2 weeks for a version upgrade, 2 to 6 weeks for a SQL Server migration. Next step: a free assessment of your database.
Last reviewed October 2026. Version support dates below are checked against Microsoft's lifecycle pages.
Which Access Modernization Path Fits Your Database?
Not every legacy database needs the same fix. This table is the quickest way to see where you land. If you are between two rows, that is normal, and the free assessment settles it.
| Your situation | Best-fit path | Typical time |
|---|---|---|
| Old .mdb file or an unsupported Access version, a few users, performance is acceptable | Version upgrade to .accdb plus cleanup | 1-2 weeks |
| Slow forms, a bloated file, or a database close to the 2 GB Access limit | Front-end/back-end split and performance tuning | Scoped after review |
| Many concurrent users, corruption, remote staff, or a need to connect to Power BI and web apps | SQL Server or Azure SQL backend with Access front end | 2-6 weeks |
| Users need a browser or mobile interface, not Windows desktops | Web front end on the migrated data | Scoped after review |
| Original design is beyond saving: duplicated tables, no relationships, undocumented VBA nobody can touch | Rebuild as a new custom database | Scoped after review |
Why Legacy Access Databases Need Modernizing Now
Access databases rarely fail all at once. They get slower each year, then an Office update, a new PC with 64-bit Office, or a second office location exposes every shortcut taken since 2008. Recurring errors eat staff time, reports stop being trusted, and the one person who understands the VBA becomes a single point of failure. Modernizing removes those risks while the system still works, which is far cheaper than doing it after it stops.
Microsoft Access Version Support Dates
An unsupported Access version keeps opening files, but it stops receiving security patches. That matters most for databases holding customer, employee or financial data. Here is where each version stands:
| Version | Support status |
|---|---|
| Access 2010 and earlier | Ended (Access 2010: October 13, 2020) |
| Access 2013 | Ended April 11, 2023 |
| Access 2016 and Access 2019 | Ended October 14, 2025 |
| Access 2021 | Ends October 13, 2026 |
| Access in Office LTSC 2024 | Supported until October 9, 2029 |
| Access in Microsoft 365 | Supported while the subscription and update channel are current |
Source: Microsoft Lifecycle documentation at learn.microsoft.com/lifecycle. Microsoft has not announced an end-of-life date for Access itself.
Signs Your Access Database Needs Modernization
Errors or crashes after a Windows or Microsoft 365 update
Forms and reports that get slower as records and users are added
"File already in use" and record-locking errors with several users
VBA that stops working after an Office upgrade or a move to 64-bit Office
Repeated corruption, constant compact-and-repair, or a file near the 2 GB limit
Still running a .mdb file, or Access 2016, 2019 or older
No way to connect the data to Power BI, web apps or other systems
No backup, version control or recovery plan beyond "copy the file"
IT, an auditor or leadership has flagged the database as a security or compliance risk
What Our Access Database Modernization Services Include
Every project starts with an assessment, then uses only the pieces your database actually needs. Here is what each piece involves in practice.
1. Version upgrade: .mdb to .accdb and current Access
Converting to the .accdb format unlocks attachment and multivalue fields, better encryption, and compatibility with current Access. The conversion itself is the easy part. The work is in what .accdb does not carry over: user-level security (.mdw workgroup files), replication, and Access Data Projects (.adp) are not supported, so we replace them with something that is. Databases built in Access 2003 to 2010 almost always need this review.
2. Front-end / back-end split
If your tables, forms and VBA all live in one shared file, that file is the reason for the corruption and the locking errors. We split it into a back-end file holding only the data and a front-end copy for each user. Updates become a simple front-end swap, and a crash on one PC no longer touches the data.
3. Backend migration to SQL Server or Azure SQL
For more users, remote access, larger data, or reporting tools, we move the tables to SQL Server or Azure SQL and relink your Access front end over ODBC. Access has not shipped an Upsizing Wizard since 2013, so this is done with Microsoft's SQL Server Migration Assistant for Access plus manual review. The tools get you most of the way; the details decide whether it works well:
Yes/No fields become bit columns and need non-null defaults, or Access shows #Deleted and write conflicts
Every table needs a primary key, and a rowversion (timestamp) column on tables that users edit avoids false "record changed" errors
Date/Time ranges differ, so bad legacy dates such as 1/1/1900 are cleaned before they hit SQL Server
Slow queries that join several linked tables are moved into SQL Server views or pass-through queries
Access-only functions like Nz, IIf and domain aggregates (DLookup, DSum) inside queries are rewritten so the work runs on the server
Autonumber, Currency and Memo (Long Text) fields are mapped deliberately instead of by default
Once the data is in SQL Server, re-pointing the front end is a small routine. This is a simplified version of what we use:
' Re-point every linked ODBC table to a new SQL Server or Azure SQL database
Public Sub RelinkToSqlServer(ByVal serverName As String, ByVal dbName As String)
Dim tdf As DAO.TableDef
Dim cn As String
cn = "ODBC;Driver={ODBC Driver 18 for SQL Server};" & _
"Server=" & serverName & ";Database=" & dbName & ";" & _
"Trusted_Connection=Yes;Encrypt=yes;"
For Each tdf In CurrentDb.TableDefs
If Left$(tdf.Connect, 5) = "ODBC;" Then
tdf.Connect = cn
tdf.RefreshLink
End If
Next tdf
End SubProduction versions also handle linked-table credentials, pass-through query connections and error logging. Always test on a copy first.
Want the full picture of this path? See our Access to SQL Server migration service.
4. VBA refactoring for 64-bit and current Office
Most Access VBA survives an upgrade untouched. The code that does not is predictable: Windows API calls written as 32-bit Declare statements, old ActiveX controls (calendar, treeview, grid and common-dialog controls) with no 64-bit build, references to missing libraries, and DAO/ADO mixtures from the early 2000s. Here is the typical fix for a Windows API call:
' Before: breaks or fails to compile in 64-bit Office
Private Declare Function GetTickCount Lib "kernel32" () As Long
' After: compiles in both 32-bit and 64-bit Office
#If VBA7 Then
Private Declare PtrSafe Function GetTickCount Lib "kernel32" () As Long
#Else
Private Declare Function GetTickCount Lib "kernel32" () As Long
#End IfBeyond compatibility, we add error handling where there is none, remove hard-coded file paths, and document what each module does, so the next developer is not reverse-engineering your system.
5. Security and recoverability
We replace user-level security with SQL Server logins and roles or application-level permissions, deliver the front end as a compiled .accde where appropriate, move trusted locations out of ad hoc folders, and set up automated backups with a tested restore. If a compliance reviewer has flagged your database, this is the part that gives you something to show them.
6. Cloud access and integration
Access is a Windows desktop application, so "moving it to the cloud" really means one of three things: keep Access as the front end with the data in Azure SQL, host the front end on a virtual desktop (Azure Virtual Desktop, Citrix or RDP), or build a browser front end on the migrated data. Microsoft retired Access web apps and Access Services, so we do not recommend or build on them. We also connect modernized databases to Power BI and other tools. See our Access to web application service and the manufacturing case study.
Modernizing Databases That Grew Out of Excel
A lot of the Access systems we see started as a single Excel workbook that kept growing: more tabs, linked files, macros, and three people each holding their own copy. Moving that into a proper multi-user Access or SQL Server database gives you related tables, data validation, and one source of truth. We rebuild the reports your team used in the spreadsheet so nobody has to relearn their month-end routine. If you are unsure which tool suits your case, our comparison of Excel vs Access for multi-user data entry explains the trade-offs.
Read: which tool fits multi-user data entry.
What Can Go Wrong, and How We Prevent It
Most failed Access migrations fail the same few ways. We plan around each one.
Data quality surprises: orphan records, text stored in number fields, and impossible dates surface during migration. We profile the data first and agree on how to handle each issue with you.
Hidden dependencies: a macro, an Excel automation or a scheduled task quietly relies on a table name or file path. We search the whole application, not just the forms.
Slow queries after the move: a query that was fine on a local file can crawl over ODBC. We test performance with production-sized data before go-live.
Users change their workflow: we keep screens and report layouts familiar and train people before launch, not after.
No way back: we never overwrite your original. It stays as a rollback option until you sign off.
Our Access Database Modernization Process
Six stages, from assessment to ongoing support.
Assessment & Planning
We review your database, check compatibility with current Access and Windows, flag risks such as 32-bit API calls and unsupported features, and recommend a path in writing.
Modernization Design
We map tables, queries, forms and dependencies, choose between upgrade, split, SQL Server migration or rebuild, and define the test and rollout plan.
Modernization Execution
We convert the format, migrate data on a copy, refactor VBA, and update forms, reports and queries.
Testing & Validation
We compare row counts and totals against the original, test every form and report with your users, and tune performance on real-sized data.
Deployment & Training
We roll out the upgraded database, hand over documentation, train your team, and keep the original as a rollback option.
Support & Maintenance
We stay available after launch for fixes, enhancements, and optional ongoing support.
Access Modernization Cost and Timeline
Fixed-scope projects typically start at $1,200. After a free review you receive a written scope and a fixed price, so the number does not change halfway through. Version upgrades usually take 1 to 2 weeks and SQL Server or cloud migrations 2 to 6 weeks.
What moves the price up or down:
Number of tables, forms, reports and queries
Amount and condition of VBA code, and whether it must be rewritten for 64-bit
Whether you are staying on Access or moving the data to SQL Server or Azure SQL
Data quality, and how much cleanup the migration needs
Number of users, locations and any integrations (Excel, Outlook, Power BI, other systems)
Training, documentation and post-launch support you want included
Why Hire Us for Access Database Modernization?
We specialize in Microsoft Access and the databases around it, so you are not paying a generalist to learn it on your project.
Access Is What We Do
Upgrades, SQL Server migrations, VBA fixes and rebuilds are our core work, not a side service. We know where legacy Access databases break.
Low-Disruption Delivery
We work on a copy and cut over in stages, so your team keeps working while we modernize.
Tested on Real Data
We check performance and results against production-sized data before go-live, not after.
Fixed Scope, Clear Quote
You get a written scope and a fixed price after the free assessment. No open-ended hourly billing.
If you only need speed, we can optimize your Access database in place. If you are ready to move the data, see Access to SQL Server migration. If the system is beyond saving, we can create a custom Access database to replace it. Not sure which one? Talk to an MS Access consultant on our team.
FAQ
Frequently Asked Questions
Find answers to common questions about our services
Access database modernization (also spelled modernisation) means updating an older Microsoft Access application so it runs reliably on current Windows and Microsoft 365. Depending on the database, that can include converting .mdb to .accdb, splitting the front end from the data, moving the data to SQL Server or Azure SQL, fixing VBA that breaks on 64-bit Office, and tightening security. The goal is to keep the forms, reports and business rules your team already uses, not to start over.
Projects typically start at $1,200 on a fixed scope. After a free review of your file you get a written scope and a fixed quote, not an open-ended hourly bill. Price moves with the number of tables, forms and reports, how much VBA you have, whether you are moving to SQL Server, and how clean the data is. A straight version upgrade of a small database sits at the low end; a multi-user SQL Server migration with VBA rework costs more.
A version upgrade usually takes 1 to 2 weeks. A SQL Server or Azure SQL migration usually takes 2 to 6 weeks, mostly because of testing with real users and real data. Very large databases or heavy VBA can take longer, and we tell you that in the written scope before any work starts.
We do not work on your only copy. The migration runs on a copy of your database, and we compare row counts, key totals and sample records table by table before go-live. Your original file stays untouched as a rollback option. No honest developer can promise that nothing will ever go wrong, which is why we validate the result instead of assuming it.
Yes, in almost every project. When the backend moves to SQL Server, your forms and reports stay in Access and connect to the new tables. Some queries and VBA routines do need rewriting, usually where Access-only functions, domain aggregates (DLookup, DSum) or heavy joins across linked tables slow things down. We find those during the assessment, not after launch.
Yes. Access is part of Microsoft 365 and is also included in the Office LTSC 2024 release, and Microsoft has not announced an end date for the product. Specific versions do expire. Access 2016 and 2019 left support on October 14, 2025, and Access 2021 reaches end of support on October 13, 2026. An unsupported version keeps running but no longer receives security patches, which is a common reason companies upgrade.
It depends on users and growth. If a handful of people use the database and it performs well, a version upgrade plus cleanup is usually enough. If you have many concurrent users, file corruption, remote staff, a file approaching the 2 GB Access limit, or a need to connect to web apps and Power BI, moving the data to SQL Server or Azure SQL is the better long-term fix. It can be done without rebuilding your forms and reports.
Most things convert cleanly. A few legacy features do not exist in the .accdb format: user-level security (the old workgroup .mdw files), replication, and Access Data Projects (.adp), which were removed in Access 2013. If your database depends on any of these, we replace them with a supported approach, for example SQL Server logins and roles in place of user-level security.
Plain VBA that only touches Access objects generally runs fine. Code that calls Windows API functions with Declare statements usually needs PtrSafe and LongPtr updates for 64-bit Office, and old ActiveX controls (some calendar, treeview and grid controls) may have no 64-bit version at all. We scan for both and replace them as part of the VBA refactoring step.
Access itself is a Windows desktop application, so the practical cloud options are: keep Access as the front end and put the data in Azure SQL, host the Access front end on a virtual desktop (Azure Virtual Desktop, Citrix or RDP), or build a browser-based front end on top of the migrated data. Microsoft retired Access web apps and Access Services on SharePoint, so those are no longer options. We help you choose based on who needs access from where.
Yes, often. Many Access systems began as an Excel workbook that outgrew itself: several linked files, heavy macros, or several people editing copies at once. We move that data into proper related tables with validation and concurrent access, then rebuild the reports your team relied on in the spreadsheet.
The common ones are crashes or errors after a Windows or Office update, forms and reports that get slower as data grows, 'file already in use' or locking errors with multiple users, VBA that stops working after an Office upgrade, repeated corruption and compact-and-repair, and no way to connect the data to Power BI or web tools. Two or more of these means a free assessment is worth your time.
A copy of the database (or screenshots of the main forms and the Database Tools > Database Documenter output if you cannot share the file), the Access and Windows versions in use, roughly how many people use it at once, and what currently hurts: slowness, errors, missing features. We reply with what we found, which path we recommend, and a fixed quote.
Ready to Modernize Your Access Database?
Send us your database through the RFQ form for a free assessment and a written modernization roadmap. We respond promptly.
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