At the very start of the game, I start with an office space of 1/4. This shows up in my monthly bill as $3k taxes / maintenance. If I click "Upgrade" and lower it to a staff of 1, this becomes a monthly $2k with $1k in rent and $1k in taxes / maintenance. If I raise it back to 4 it will cost me $7k / month ($4k rent and $3k taxes / maintenant).
The server costs also seem completely out of control, especially with the limits on revenue. If my userbase exceeds my capacity, this shows up as a massive server cost that is several times larger than the revenue those users will bring. It makes no business sense at all to spend $20k / month on servers for customers that will bring $4k / month in revenue. I couldn't even unclick the button for "Increase Userbase"