I do mine in groups.
House; mortgage, council tax, life insurance for mortgage, buildings & contents insurance.
Cars; 1 x car loan, 2 x insurance, 1 x breakdown, 1 x warranty & breakdown, 2 x MOT, 2 x road tax + average monthly spend on fuel.
Dogs, insurance, flea & worming, food.
Utilities; gas, electric, water, broadband and phones.
Entertainment, sky, Netflix, Amazon, newspaper subscriptions, Audible, national trust & English Heritage.
Then I add the typical monthly supermarket spend and scare myself silly.