Part of buying a house is getting a mortgage; part of getting a mortgage is figuring out what repayments you can afford; figuring out what repayments you can afford requires budgeting; and to make a budget, you need to figure out what you spend already.
I use a program called Gnucash to track our spending. I export statements from internet banking, and Gnucash sucks the data in and categorises it.
Now I often run reports on a monthly basis in Gnucash, but there’s an obvious thing I should have been doing but only just thought about now.
Obviously, there are a lot of expenses that only happen once a year, like paying our insurance premium. And there are other expenses that are irregular, even though they’re certain, like holiday spending, or going to the doctor. So the right way to work them out for a monthly budget — we both get paid monthly, so that’s the best way to work it out for us — is to total expenses over a whole year, and then divide by 12. Or maybe even over two years, and divide by 24.
And what a sickening revelation that was. It turns out that there are things that I think of as “one-off” that really are recurring expenses, just not frequent or regular ones. For example, we spend quite a bit flying around the place visiting friends and relatives. I drink a lot. I buy $40 of books every month, on average. And so on.
The only comfort is that our grocery bill tells me that I am a supermarket ninja. We eat well on only $125 per week, and that includes a fair amount of wine and a teenage girl 12 weeks of the year. But apparently I have a long way to go in other departments.
I do sort of have a system for irregular stuff. I have an account called “bills” and put a fixed amount in it every month, and pay all the bills out of it, so if some months we spend less, there’s a buffer building up for the months when we spend more. But maybe it’s time to actually do a real business-style budget, with a forecast for the coming year, and a monthly update to track actual spending against the forecast.
As always, your suggestions on budgeting for irregular, infrequent things are welcome.