Initially the client chose to go with an alternative that offered 'free' service for time logging but it was crippled and to get the really good features cost a lot more. They tried that for a couple months then decided to take my offer.
My initial offer was $4.99/user/month but I would give them the first two months free since they were the first customer and I knew some enhancements were needed.
A few days before August 1st they called and said they wanted to take me up on my offer but needed it ready by August 1st so all staff could use it for the month of August. I agreed and billed them my normal rate to do the 10 hours of minor enhancements they wanted. Plus for free I made several core changes which I deemed essential and good for the overall service.
Over the month of August they made several more requests. About half of them I did for free because I deemed them as essential and good for future clients. The other half I billed them my hourly rate.
The staff using Abacus have been extremely pleased saying it is easier to use than Deputy or the old 'punchclock' software they used to use. Plus, even more importantly, it has saved both the staff/users and the client significant time. Before they were using one software for tracking time and then copying that information into spreadsheets to determine payroll. With Abacus the payroll is generated easily directly within the website. The website also allows users to enter their preferred payment methodology and currency code. Some get paid in GBP, some in Euro, some in USD and others in Mexican pesos. The client pays the users in their preferred currency and let's them track any bank fees or conversion fees into other currency. For example some get paid in GBP (British pounds) and deposited into their bank which converts it into Euros. The client puts in the GBP they paid and the user can enter the Euro actually received.
In summary, all is going great. I plan on offering them the option of my integrating the Abacus data tables and web pages into their new website once that is completed. I'm building their new website using Wizard's Toolkit (https://wizardstoolkit.com) and the new website should be completed by January 15th, 2023. My goal will be to negotiate integrating but still charging the $4.99/user/month in addition to a setup and installation fee.