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11 public articles, also published on the Zendesk help centre. CIS300 and other CIS articles are current. PAYE / RTI filing was retired for 2025/26.
From the Gateway Solver user manual: who it is for, firewalls, command line, supported forms.
We use the same installer file to both install a new Gateway Solver install and to update an existing one to the newest release version. The URL to download our installer: https://download.evolvedsoftware.com/SetupGatewaySolver.exe Gateway Solver will check…
New in Gateway Solver Version 2.66 Find out how to check a National Insurance number if you’re an employer. If you want to find or check an employee’s National Insurance number, you can do so by…
HM Revenue & Customs' portal (which shows your outstanding PAYE/NIC liabilities, as well as any previously filed CIS300 submissions and subcontractor tax treatment verifications, etc) is a separate standalone product (and government department!) and is not…
Gateway Solver supports the following forms; PAYE / RTI Full Payment Submission (FPS) Earlier Year Update (EYU) Employer Alignment Submission (EAS) Employer Payment Summary (EPS) Including: Apprenticeship Levy, Recoverable Amounts, Nil and Inactivity Returns, Start/Stop Employer's…
The settings within Gateway Solver can be overridden using the command line by stipulating the appropriate parameters at the time Gateway Solver is launched, it is possible to automate the software. This is especially useful if…
Gateway Solver is an internet-enabled product which will require access past your corporate firewall to work as intended. It requires TLS support. Please ensure the following destinations are accessible: Domain Firewall Rule *.evolvedsoftware.com Port 80, 443…
Gateway Solver is a software product which provides companies with a way to handle the online filing requirements of PAYE/RTI and CIS with full HM Revenue & Customs recognition and compliance. Gateway Solver can be used…
Errors, confusing messages, return rejections, submission failures and general disappointments.
When you attempt to launch Gateway Solver you receive the following message: It's not a Gateway Solver error but it might affect you from time to time. First, read this: see this Microsoft Support article Open…
You're trying to file your monthly CIS300 submission or make subcontractor tax treatment verifications and you see this message; Not what you wanted to see... There are usually three reasons for this Reason 1: Gateway Solver…
You've tried filing a tax submission online and all you earned for your efforts is an "Authentication Failure". "Error 1046. The supplied user credentials failed validation for the requested service". This guide covers the most common…
Release notes and changes that affect every install.
Version 2.95 Version 2.95 is a major release, and covers updates to the Gateway Solver API (GatewaySolverAPI.dll) client, the Gateway Solver Desktop application, the Gateway Solver Uploader Service (GSUS) and our web services. All installations of…
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