Guide
Most solo contractors lose 14 to 22 hours a week to quoting, invoicing, calls and paperwork. Here's the honest breakdown, and the maths on what each hour is worth in lost billable capacity.
Ask a contractor how many hours a week go on admin and most guess low, because it doesn't feel like one big block. It's ten minutes here, twenty there, a call while you're up a ladder. Add it up properly and the number is bigger than anyone wants to admit.
| Task | Hours per week |
|---|---|
| Quoting and site visits | 4-6 |
| Invoicing and chasing payment | 2-3 |
| Bookkeeping and receipts | 2-4 |
| Calls and scheduling | 4-6 |
| Supplier runs and pickups | 2-3 |
| Total | 14-22 |
Call it three unbilled days out of five, some weeks. In a 45-50 hour working week, that leaves 23-36 hours actually on the tools, which is where the money is made. This is the direct reason solo operators typically run at 45-60% utilisation: the ratio of billed hours to total hours worked.
The range depends on trade and setup. A plumber doing emergency callouts spends more on scheduling and less on quoting than a landscaper who prices every job upfront. A one-van electrician who already uses a scheduling app might sit at the low end for calls but still burn hours on manual invoicing. Nobody is average, but the categories are the same for everyone, and that's what makes the total worth tracking for your own week, not just accepting a industry figure.
If you've never logged it, try one week: a notepad in the van, five categories, ten seconds per entry. Most people are surprised the total isn't lower.
The usual mistake is valuing admin time at what it would cost to hire someone to do it, say $20-25 an hour for a part-time assistant. That's the wrong number if you're the one doing the admin, because the real cost isn't what you'd pay someone else. It's the billable work you didn't do instead.
Work out your billable rate first. If you don't have one, the hourly rate calculator will get you there from your costs and target income. Say it comes out at $110 an hour.
Now apply utilisation. If you only bill 55% of the hours you work, your effective rate across the whole week is:
$110 × 55% = $60.50 effective hourly rate
That's the real number your business runs on, not the $110 you write on the invoice. Every hour spent on admin instead of billable work is an hour where you earned $60.50 in effective terms but had the capacity to earn $110. The gap, $49.50 an hour, is what admin is quietly costing you, multiplied by 14-22 hours a week.
Small habits look harmless because they're small each time. They aren't small over a year.
Ten minutes a day, five days a week, 52 weeks:
10 minutes × 5 days × 52 weeks = 2,600 minutes = 43.3 hours a year
At a $110 billable rate, that's roughly $4,760 a year of capacity you could have billed. Even valued conservatively at the $60.50 effective rate, it's about $2,620. Call it $3,800 as a working midpoint for one task done manually, every single day, that could be cut or automated.
Common examples of that ten minutes: manually typing an invoice instead of sending one from a template, calling a supplier for a price check instead of texting, or re-explaining a job over the phone that a form would have captured. None of these feel expensive in the moment. That's exactly why they survive for years unfixed.
Calls and scheduling take 4-6 hours a week partly because contractors answer calls live all day, and partly because unanswered calls come back as voicemails, callbacks, and lost jobs. If you want to see what missed calls specifically cost in lost revenue rather than lost time, the missed call revenue calculator puts a number on that side of it, separate from the admin-hours cost covered here.
Once you know your effective rate, don't fix admin randomly. Rank tasks by how many hours they eat and how cheaply they can be cut, then work down the list.
Worked example: fixing invoicing saves 1.5 hours a week. At $110 an hour that's $8,580 a year in recovered billable capacity. If a paid invoicing tool costs $300 a year, that's a strong trade. If a full scheduling platform costs $2,400 a year to save the same 1.5 hours, it isn't, not for that gain alone.
A simple cap keeps spending honest: don't spend more on a fix than roughly a third of the annual value it recovers.
If cutting a task saves $6,000 a year in recovered capacity, cap the tool or system spend at about $2,000 a year. That leaves a real margin of benefit and stops you overpaying for software that promises to "save time" without ever being tested against your actual numbers.
Run the maths per fix, not for your whole admin pile at once. Some fixes are free (a template, a text-based booking link). Some are worth real subscription money. The one-third rule tells you which is which before you commit.
Log your own hours for five working days using the five categories above. Compare your totals to the 14-22 hour benchmark. Then take the single biggest, cheapest-to-fix category and apply the one-third rule to whatever tool or process change you're considering.
If you want a starting point rather than building from scratch, the small business operations kit has templates for quoting, invoicing and scheduling built for one-person and small-crew operations. If a chunk of your time goes on writing quotes, follow-ups or job descriptions, the AI prompt pack for home services is built to cut that specific drafting time down, worth checking against the one-third rule like anything else.
The Small Business Operations Kit ($19) turns guides like this one into fill-in-once worksheets: rate card, quoting sheet, job costing, payment terms and follow-up templates. Built by the same people who write these guides.