Planning our weekly and monthly spending is how we find the money to repay debts and begin to save and invest. When I’ve talked about this with people in the past, they tell me that they can start to save but “something always comes up”.

Ah yes, the something-always-comes-up effect, or as it’s otherwise known, the occasional spending issue.

If your spending plan only covers the day-to-day expenses that occur every month, then it will seem like “something always comes up” because many months have additional expenses that only occur once a year. If you don’t plan for these, they will always derail you.

So how can you get on top of your occasional spending? Well, occasional expenses can be categorised as fun vs boring types and predictable vs random types.

We’ll start with the predictable expenses because these are where the map of the year comes in. Get a calendar and write in each month any big expenses and also any times when your income changes. For example, if your employer pays a bonus (and you can be very confident you will be getting this bonus) when would that come? Is there seasonal variation in your hours, commission or profits? Mark that in.

This is your money map of the year. It could look something like this*:

Using the map will help you to see if there are particular crunch points in your year when several expenses come at once. You can then work out if any of these could be paid early or delayed to smooth out your costs. It can also help you to be clear during the “good” months how much you need to save for upcoming costs and how much is actually available for a bit of fun.

The random expenses are a bit trickier. You need to think about roughly what you expect them to cost and how often you expect them to happen e.g. if you’re in your mid-late twenties you can expect quite a few of your friends to be getting married and having babies, so it’s a good idea to put a small amount of money aside each month, so you can really enjoy these celebrations when they happen without worrying how much you’re spending.

If you’re a homeowner, you can probably expect one significant repair or replacement every year, so consider how much you’d expect to spend on a new appliance, item or furniture or repair call-out and divide by 12.

Mapping your money year and having a pot of savings (or two) for random costs, brings a strong sense of control and peace of mind. There’s nothing like knowing you’re not going to have to borrow for Christmas and you won’t be caught short by a blocked pipe or a bricked phone.

What is on your map? Can you take a photo and send it to me on Twitter @marthalawton?

*This is not my actual map of the year, it’s loosely based on UK averages.