If you want to manage your home accounts on your Raspberry Pi, Grisbi is a free application you can use to keep track of your regular and one-off payments. Although other programs are also available, Grisbi is the easiest one I’ve tried, both to set up and keep updated. Many banks enable you to download your bank statement in a format that can be used in Grisbi, so you might be able to analyze your financial situation without too much rekeying.
To install Grisbi, use
sudo apt-get install grisbi
You can find it in the Office category of your Programs menu.