Gateway Solver Desktop
Install Gateway Solver
Same file for a first install and for an update. This is the CIS product. PAYE / RTI filing through Gateway Solver was retired for 2025/26.
Download
Download Gateway Solver installer (Windows)
Current desktop: Windows 10 or 11, or a current Windows Server. Older published requirements listed XP through 10 and Server 2008 R2. That set is not a promise that XP still files CIS.
After installing
New customers: complete the new customer setup form (about five to ten minutes) so we can finish the account. Existing customers: run the same installer over the top, then open the product.
Version 2.95 and later talk to https://gatewaysolver.evolvedsoftware.com. Allow
*.evolvedsoftware.com and HMRC / Government Gateway hosts on TCP 443.
Product details: Gateway Solver Desktop. Help: support centre.