Petrol just jumped 20% in a month — do you know what that's actually costing your household?

91 octane in Auckland sat at $2.50 a litre at the start of March. Six weeks later it's $3.04 — a 20% jump on a non-discretionary line item with no warning, and economists are openly discussing $4 a litre as a realistic scenario if Middle East tensions don't ease. Most coverage frames it as a pump-price story. SortMe and Jamie Reynolds, financial adviser at Naked Finance (FSP596030), think the headline number is actually the small problem. Drawing on what SortMe sees across thousands of connected household accounts, this episode unpacks the flow-on costs that quietly land on groceries, deliveries and services about six weeks after a fuel shock, and what an established Auckland household should actually do this week to soften the next one. In this episode:What a 50c/litre jump really costs a two-car Auckland household (~$20 a week, ~$1,040 a year, $1,500–$3,000 over a fixed mortgage term)Why the headline pump price is the small problem and the flow-on costs are the big oneThe six-week lag SortMe sees in the data: transport rises first, then groceries and services, then discretionary quietly shrinks to absorb itWhen the maths tips toward AT HOP — and the hidden saving most households miss when they cut driving by 40%Why Jamie says insurance and income protection should be the last things to cut, not the firstThe "slush fund" buffer that turns a 20% fuel shock from a stressful event into an inconvenience — and why even one month of essential running costs is a meaningful startThe five things to do this week to keep the anxiety at bayWhere SortMe fits — and exactly what to look at in the Cashflow and Transactions views tonight to see what the spike has already cost you since FebruaryRead the full article: sortme.com/post/petrol-jumped-20-percent-cost-household