Dario Petric was billing somewhere around $2,380 a month washing and detailing cars at customers’ homes, alongside his warehouse shifts. It felt like a solid side income, since $2,380 is a figure you watch arrive while the costs were never a figure at all.
They came as a tank of fuel here, a case of product there, a replacement extractor in March, and a string of forty-minute drives out to a suburb holding three regulars. None of it registered as spending. Every bit of it was.
Once he finally set the costs against individual jobs rather than against the month, the picture shifted in two places at once: the business held onto roughly half of what it billed, and one of those three regulars had been costing him money for a year.
What arrives is not what stays
Almost everyone running something on the side tracks the first figure and estimates the second, because the first is a notification on a phone while the second is arithmetic nobody requested. The trouble is that pricing gets decided against whichever figure sits in your head, and where that is the arriving one, every price you set runs low by precisely the amount going uncounted.
Dario was hardly disorganised. He kept his receipts and filed on time, which is the version of this most guides bother describing. What he had never once done was attach a cost to a job instead of to a month, so the forty-minute drives disappeared into a general sense that fuel is expensive. Costing the work job by job took him about fifteen minutes.
The fifteen minutes that changed his prices
Nothing was guessed. He entered his jobs, his prices and the running costs he already held receipts for, and got the same month returned to him split another way.
What came back · in roughly fifteen minutes
fuel, product and wear on equipment split across the work that consumed them, which is precisely where the far suburb stopped resembling three loyal customers.
$9.40 once driving counted as work, set against $13.60 on the warehouse floor. He had been paying for the privilege of running it.
one regular, forty minutes in each direction at his standard price. Not a difficult customer at all. A wrong price for that distance.
neither a guess nor a rival’s rate. Whatever the job cost him plus a margin, which landed above what he had charged for two years.
Up went the standard price, on went a travel figure beyond a radius he chose himself, and the far suburb was let go. Billing fell to around $1,980 a month across fewer jobs. What stayed with him rose to roughly $1,760.
The costing ladder, rung by rung
Rung 1 · Separate the money before counting it – a single account or card used for the side hustle alone. Everything following this gets easier, and nothing preceding it can be trusted.
Rung 2 · Attach every cost to a job – a tank of fuel is no monthly expense; it is a share of the four jobs it carried you to. Costs assigned to a month simply vanish inside it.
Rung 3 · Count your own hours honestly – driving, setting up and packing away all count as work. A job paying well across two hours and consuming four pays badly.
Rung 4 · Reprice from cost, then look outward – begin with what the job costs you and add a margin. Checking competitors first is how you inherit somebody else’s error.
The rung that shifted things for Dario was the second. His costs were never mysterious in total. They were mysterious per job, which is the only place a price can be checked against anything.
Why a packed month can keep the least
Because costs climb with the work while prices generally sit still. A quiet month feels poor and frequently retains a decent share of a small figure. A packed month reads as proof the thing works, and can quietly retain less, because the additional jobs were the distant ones, the awkward ones and the ones wedged in with a longer drive attached to them.
Which is how a side hustle can feel like it is growing for a whole year while the money in the account behaves no differently at all. Here is what earned its place in Dario’s numbers, and what did not.
- One account used only for the side hustle
- Costs divided by the jobs that used them
- Driving and setup counted as paid time
- A travel figure beyond a radius you set
- Repricing from your own costs before checking competitors
- Judging the month by what arrived
- Treating fuel and materials as general monthly spending
- Keeping a regular customer at a price that loses money
- Assuming a busier month is a better one
- Pricing off what somebody else charges
Sequence is the whole discipline: separate the money, attach costs to jobs, count your own hours honestly, then set the price from whatever you find. Most people perform the last step alone, and perform it off a competitor’s website.
What it costs beside the alternatives
Dario could have reached the same place eventually by noticing that a good year had left his balance untouched, which is the free route and costs roughly that long. Here is how the usual approaches compare with costing the work directly.
| Approach | Cost | What it does about the money |
|---|---|---|
| Track the total and estimate the rest | Free | Keeps the tax return tidy and the prices wrong |
| A spreadsheet you build yourself | Free | Works, if you also work out what to put in it |
| An accountant | $150–400/yr | Excellent for the return, rarely priced for pricing |
| Side Hustle Expense Tracker | $9 | Cost per job, your real hourly rate, the work that loses money |
“Does an accountant not already do this?” Partly, and an accountant is well worth having – especially for anything touching tax, where rules differ by country and by how you are registered, and where guessing is genuinely expensive. What an accountant is usually asked for is a correct return, which is a backward-looking document. What repriced Dario’s work was the same information turned forwards: cost per job rather than cost per year. Those are different questions and the second one rarely gets asked. This is general educational guidance about costing your own work, not tax, accounting or financial advice, and how to record and declare side income varies considerably by country.
Two more who found it in their costs
“Two of my clients were an hour’s round trip and I had been charging them the same as the ones round the corner for three years. Adding a travel figure lost me one of them and paid me better for the other.”
Rosalie B. · mobile hairdressing, Sioux City IA
“I thought I was making about forty a piece. Counting the sandpaper, the finish and the trips to collect them it was closer to twelve. I did not need more sales, I needed to stop buying pieces that far away.”
Wendell K. · furniture flipping, Akron OH
Side income arrives unevenly whatever the margin looks like, and the Irregular Income Budget Plan is built for budgeting against a month you cannot forecast. Results vary; this is general guidance and not tax or financial advice.
Five short answers, and your own figures land the same day: what each job genuinely leaves, your real hourly rate once driving and setup are counted, and which work quietly loses money. Everything is worked from costs you already hold receipts for rather than from an estimate, which tends to be why the price coming out sits above the one you have been charging.
*Individual results may vary.
