Sage 50 2021 Download Accounts for free. Sage 50 software 2021 latest version Accounts is a small business accounting and invoicing solution. Here's a look at what's new in this latest version that includes a range of new features to streamline workflow along with security enhancements to keep your data safe. Step by step Go to Services, Check for Updates. Click Check Now – Click Download to download the update – Close Sage 50 to start the installation.