Money

How to make a monthly bills list that includes the ones that are not monthly

Rent is easy. The insurance that arrives every three months and the annual renewal are the ones that ambush a month. Here is a list that includes them, and the columns that matter.

2 min read26 September 2026

A bills list feels like the simplest possible piece of organizing, and it usually fails at the same point: it lists what arrives every month and forgets everything else. The bills that surprise you are almost never the monthly ones.

A useful list has a small number of columns and includes the quarterly and annual bills from the start. It takes about half an hour to build the first time, and a few minutes a month to keep.

The columns

  • Name

    What to write
    Rent, electric, car insurance
    Why it matters
    You will scan for it by name
  • Amount

    What to write
    A number, or a low and a high
    Why it matters
    Some bills move; be honest about it
  • Due day

    What to write
    The day of the month, or a specific date
    Why it matters
    A bill with no date cannot be planned around
  • How often

    What to write
    Monthly, quarterly, annual
    Why it matters
    Tells you what a month really costs
  • Essential

    What to write
    Yes or no
    Why it matters
    What has to be paid before anything else
  • Shared

    What to write
    Who pays part, and what share
    Why it matters
    Stops you paying for someone else's half

Turn every bill into a monthly amount

To see what a normal month costs, convert every bill to a monthly equivalent. A monthly bill is itself. A quarterly bill divided by three. An annual bill divided by twelve.

For example, car insurance of $612 every three months is $204 a month. A $96 annual renewal is $8 a month. Add those to the monthly bills and you have a more honest figure for what leaves in a month than the bills you can see in your banking app.

Build it in four passes

4 things to do

Ticks are for this visit only. Nothing here is saved anywhere.

Bills that move around

Electric, water and phone bills change. Write a low and a high, and plan toward the high. There is a longer method in how to budget for bills that change every month.

For the non-monthly ones, a small monthly amount set aside for each is the quieter alternative to scrambling when they arrive. That idea has its own guide: sinking funds.

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