Picture the Sunday-night version of this. One partner has the banking app open on the couch, the other is squinting at a Hnry summary on their phone, and there's a Google Sheet on the laptop that stopped being accurate around the time the second kid arrived. Salary lands fortnightly. The side hustle money turns up whenever it turns up. A distribution from the business shows up twice a year, and nobody's ever quite sure which week. Four income streams, and not one place that adds them up. There are just so many variables, complexities and unknowns make it really difficult to manage finances when income streams are inconsistent.
So how does one effectively manage personal finances when income and expenses are so variable?
Tax is the solved part. The household isn't.
Most advice for this situation in New Zealand is really tax advice wearing a budgeting hat. Set aside 20 to 33% for IRD (1). Register for GST once turnover crosses $60,000 (2). Use a secondary code on the second PAYE job (3). That part is handled. Hnry, Solo and a good accountant have the tax side sorted (4)(5). The bit they leave untouched is the household itself: what can you spend this week, given the money arrives in four rhythms that never line up?
Here's the method we keep seeing work for SortMe households who've cracked it. It takes about an hour to set up. After that it mostly runs itself.
Step 1 — Get every income stream onto one screen
Start with visibility, because you can't plan a number you can't see. Get every inflow onto one screen: the salary, the side hustle, the dividends, the business drawings.
This got far easier with the nationwide rollout of open banking. All the major banks are now connected, all going through Akahu, the bank-approved secure intermediary (6)(7).
Connect once and SortMe pulls every bank account, plus KiwiSaver, Sharesies, Hatch and Kernel, into a single feed sorted by where the money came from (8).
Step 2 — Sort income by how it behaves, not how big it is
Then sort your income by how it behaves, not how much it is.
Salary and steady rental are the dependable stuff: same date, same amount. The side hustle and any freelance work are the wobbly stuff, fine on average but useless for planning a single month.
The lumpy stuff, distributions and dividends and the odd bonus, lands rarely and lands big. Plan the household on the dependable income alone.
Treat the wobbly and lumpy money as savings or goal fuel. The moment you let a good quarter set your lifestyle, the next ordinary quarter feels like a pay cut.
Step 3 — Make the tax visible before it's owed
Tax comes next, and the trick is to make it visible before it's owed. Hnry skims it at the door (4). Solo shows a live figure if you'd rather handle payments yourself (5). If you use neither, the workaround is dull and reliable: auto-transfer 25 to 33% of every non-PAYE deposit to a savings account at a second bank. SortMe keeps that pile on the dashboard next to everything else, so the tax money never quietly becomes "savings" you spend by mistake (8).
Step 4 — If one income stream runs through an entity
There's a fork in the road here. If your income is all PAYE, dividends and interest, the standard household view is everything you need, so skip ahead. If one of your streams runs through an entity, a sole trader business, a look-through company, a family trust, a rental, there's a second leak the ordinary view won't catch. It's the business spending that came off a personal card. The petrol. The home-office slice of the power bill. That Adobe subscription that's been charging your personal Visa since 2023. Hnry never sees it. Your accountant can't rebuild it in March. Every receipt that slips through is deductible money you hand to IRD for no reason.
That's the job SortMe Pro was built for. It runs an Entity Management workspace beside your personal budget.
You connect the entity's accounts through Akahu, same as the rest. When a business cost lands on your personal card, you tag it to the entity on the spot, snap the receipt, and it sits in two places at once: still in your personal cashflow, and now in the entity's deduction ledger. Come 31 March, one button spits out a tidy zip for the accountant, every transaction categorised, every receipt attached (9).
Step 5 — Budget the household, not the stream
The real unlock, though, is deciding what counts as your budget. It's the household, not the individual stream. Say you bring in $90,000 from a corporate job and $20,000 from a Shopify side hustle, and your partner earns $180,000 from a business stake plus $8,000 in dividends. That's not four budgets fighting each other. It's one household with four taps running into the same tub. A household Safe to Spend nets the whole lot against the real commitments, mortgage, power, daycare, groceries, the subscriptions, and tells you what's genuinely free this week. SortMe recalculates it every day across every account you've linked (8).
That one number does more than stop the odd overdraft. It changes the big calls too, since the mortgage refix, the KiwiSaver fund choice and the someday-bigger-house all get weighed against the full picture instead of whatever happens to be sitting in the everyday account.
Step 6 — A 15-minute monthly review
Keep the upkeep almost embarrassingly light. Fifteen minutes, same day each month, both of you looking at the same screen: the Safe to Spend, the Cashflow Health Score, how the goals are tracking.
Change one thing. Shut the laptop. Hnry keeps doing tax. The accountant keeps doing year-end. SortMe keeps the household honest in between.
While it's at it, SortMe's subscription sweep turns up an average of $2,371.27 a year in stuff people forgot they were paying for (11), and multi-account households tend to be the worst offenders.
The wider call
None of these tools is trying to replace the others. Hnry settles the tax at the door, the accountant handles the return, and SortMe holds the messy middle: the household cashflow and, when there's an entity in the mix, the deductions that used to vanish.
The trial runs at sortme.com for $1 for 7 days.
Sources
- Side Hustle Tax Guide NZ, Calculate.co.nz — calculate.co.nz
- Is your hobby a business? (GST registration threshold), IRD — ird.govt.nz
- Provisional Tax Explained, MoneyHub — moneyhub.co.nz
- Hnry — Pricing — hnry.co.nz/pricing
- Solo — soloapp.nz
- Open banking unlocked: banking's role in NZ's Customer Data Right, Simpson Grierson — simpsongrierson.com
- Akahu CDR accreditation — developers.akahu.nz
- SortMe — Integrations and Safe to Spend — sortme.com
- SortMe Pro — Entity Management — sortme.com/pro
- SortMe pricing — sortme.com/pricing
- SortMe — Average subscription saving $2,371.27/year — sortme.com/pricing
