Access can support roughly 5–15 simultaneous users on a well-split file over a solid LAN. Beyond that, expect locking pain or move the back-end to SQL Server. User count is not the only factor: report-heavy workloads need fewer users than light data entry.
How Many Users Can Share One Access Database?
Access can support roughly 5–15 simultaneous users on a well-split file over a solid LAN. Beyond that, expect locking pain or move the back-end to SQL Server. User count is not the only factor: report-heavy workloads need fewer users than light data entry.
Split Front-End and Back-End First
Never run multi-user production from a single .accdb on a network drive. Split so each user runs a local front-end linked to one back-end. I rebuild unstable systems this way before touching SQL migration.
how to split an Access database · Access consulting
Locking and Connection Settings
Use Default Record Locking: Edited Record. Open databases with shared mode. Avoid opening the back-end directly for editing. Train users to close forms instead of leaving idle sessions.
- Edited Record locking, not All Records
- Auto compact disabled on front-ends (compact back-end on schedule)
- Short forms instead of datasheet views on large tables
- Indexed fields on every join and filter column
Network and Hardware Reality
Wi-Fi drops cause corruption. Wired connections to the server share perform better. Antivirus scanning the live .accdb during business hours causes false locks. Exclude the data folder or scan after hours.
Next Step
Book a free consultation or request a fixed-price estimate for your Access database.