You already own a van full of tools for contractors: drills, ladders, a meter, a set of spanners you would not lend to your own brother. But the tools that decide whether your business survives the year are not in that van. They are the back-office systems that capture your time, send your invoices, collect your money, and tell you whether the last quarter actually made a profit. This is the part nobody trains you on.
The difference between a tradesperson who scrapes by and one who builds a real business is rarely skill with the trowel or the soldering iron. It is the admin. The pro knows exactly how many hours went into the GBP 924 bathroom job, invoiced it the same week, got paid by card, and can tell you their best client at a glance. The hobbyist is hunting through text messages for what they agreed, sending a handwritten total, and chasing a cheque three weeks later. Same skills, completely different outcome. This guide walks through the categories of digital tools every contractor needs, what to look for in each, and where one app can cover most of the loop.
1. Time tracking: the foundation everything else sits on
If you bill by the hour, or even if you quote fixed prices, you cannot run a business on guessed time. Time tracking is the foundation because every other number downstream, your invoice total, your true hourly rate, your profit on a job, depends on knowing where the hours actually went.
The contractor who writes "about 6 hours" on a notepad at the end of a long day is leaving money on the table every single week. Studies and plain experience both say the same thing: reconstructed time is always under-counted. The 20 minutes you spent on the phone with the supplier, the half hour driving back for the part you forgot, the snag you fixed for free, all of it vanishes when you log time from memory.
What to look for in a time-tracking tool:
- One-tap start and stop. If it takes more than a second to start the clock, you will not use it on a busy site. The timer should be the first thing you see.
- Works offline. Half the jobs in this trade are in a plant room, a basement, or a new-build with no signal. The timer has to keep running with no internet and sync later, not lose your afternoon.
- Survives a phone restart. A running timer should not die because your battery dipped or the app got backgrounded for an hour.
- Tags time to a client and job. Loose hours are useless. Each entry needs to attach to the right customer and project so it can become an invoice line later.
Billr's one-tap timer is built for exactly this: start the clock as you pull up to the job, it keeps counting with no signal, survives a restart, and every entry is already tagged to the client and project. If you want the full case for tracking every minute, we made it here: how to track billable hours without losing money.
2. Invoicing: turn work into a bill that gets paid
An invoice is not paperwork. It is the moment your labour becomes money, and a sloppy one slows that moment down. A bill scrawled on a delivery note gets shoved in a drawer. A clean, numbered, branded invoice with clear payment terms gets paid.
The big trap here is re-typing. If you tracked your hours properly, the worst thing a tool can make you do is enter them all again by hand to build the invoice. The whole point is that tracked time should flow straight into invoice lines.
What to look for in invoicing:
- Builds from your tracked time. Select the uninvoiced hours for a client and turn them into invoice lines in one move, no re-typing.
- Looks professional. Your logo, your colours, a proper invoice number. A EUR 1.800 job deserves a document that looks like it came from a real company.
- Handles tax correctly. VAT, sales tax, or withholding tax, with the right label and rate. Getting this wrong creates accountant headaches in January.
- A reusable item catalogue. Save the services you sell again and again (callout fee, day rate, common parts) so you drop them onto a bill instead of typing them.
- Sensible due dates and a paper trail. A due date the client can see, and a record of when the invoice was created and sent.
This is the core of what Billr's invoicing does: tracked hours become a branded, numbered invoice in a couple of taps, with a service-item catalogue and proper tax handling baked in. New to writing invoices? Start with our plain-English guide to invoicing clients.
3. Getting paid online: shorten the gap between done and paid
Doing the work is half the job. The other half is the money actually landing in your account, and that is where most contractors quietly bleed. "Send a cheque" or "I will do a bank transfer" turns a finished job into a three-week wait and an awkward chase.
An online payment option attached to the invoice is the single biggest lever on how fast you get paid. When the client can tap a link and pay by card the moment they open the bill, you remove every excuse for delay.
What to look for:
- Card payment on a hosted pay page. Your client opens a link, sees the amount and your logo, and pays. No login, no friction.
- More than one method. Card via Stripe, PayPal, plain bank transfer, and SEPA or a scannable QR code, so the client uses whatever they prefer.
- Automatic reconciliation. When the card payment clears, the invoice should mark itself paid so your records never drift out of sync.
- Clear overdue flagging. The tool should show you what is past due without you keeping a separate list.
Billr puts a pay link on every invoice (Stripe, PayPal, bank transfer, SEPA/QR), and when a card payment confirms, the invoice is marked paid automatically. One honest note on chasing: Billr's overdue reminders are push notifications to you, at a time you choose, telling you a bill is late. It does not send automatic chasers to your client, so you stay in control of that conversation.
4. Client management: a real record, not a phone full of numbers
Your customers are the business. Yet most contractors store their entire client base as a mess of contacts, a few WhatsApp threads, and a notebook. A lightweight client management system (a CRM, if you want the jargon) keeps the things that matter in one place.
What to look for:
- Full contact details. Name, company, phone, email, address, and a tax ID if you invoice businesses.
- A default rate per client. So your good long-term customer and your one-off emergency callout can sit on different prices without you remembering each time.
- History at a glance. What you have billed them, what they still owe, when you last worked for them.
- Notes and tags. "Pays fast," "gate code 4471," "always asks for a Friday slot." Small notes save real time.
Billr includes a lightweight client CRM that does this: full contact records, a default rate per client, tags, and a running view of what each one has been billed and still owes. From a client's record you can start a timer, build an invoice, or open their projects without digging.
5. Project and job tracking: know where every job stands
One-day jobs you can hold in your head. A kitchen refit, a rewire, a full repaint across three weeks, you cannot. Without project tracking you find out you have blown the budget only when the bill comes in lighter than the hours you put in.
What to look for:
- A budget and a time estimate per job. Set what you expect the job to cost and how long it should take, up front.
- Live tracking against that estimate. As you log hours, the tool should show you the percentage of budget and time used, so you spot an overrun while you can still do something about it.
- Tasks inside the job. Break a big job into stages so you can see what is done and what is left.
- A per-project rate. Some jobs are priced differently. The tool should let a project carry its own rate.
Billr's projects do exactly this: each job carries a budget estimate and a time estimate, and as you track hours you get a live progress bar for both, plus a simple task board. You see the EUR 4.200 extension creeping toward its limit before it becomes a loss, not after.
6. Reporting: the numbers that tell you what to do next
You cannot improve what you cannot see. Basic reporting turns a year of jobs into answers: which clients are worth keeping, what you actually earn per hour, whether spring was better than autumn.
You do not need a finance degree. Two reports cover most of it:
- An earnings report. Revenue broken down by client and period, so you can see your top five customers and quietly fire the bottom one.
- A work report. Hours worked per client, which tells you your real hourly rate once you include the unbilled bits. The GBP 280 day rate that took eleven hours was not a GBP 280 day.
Billr's earnings and work reports give you both, filtered by client and by period, with export when you need to hand figures to your accountant. Spending ten minutes a month here is how a hobbyist becomes a business owner.
7. Accounting: the one tool Billr does not replace
Here is the honest bit. An all-in-one like Billr covers most of the operating loop, track, bill, get paid, manage clients and jobs, and see the numbers. What it is not is full accounting software.
Billr does not keep an expense ledger, reconcile your bank account, or file your tax return. It also does not produce quotes or estimates, and it has no recurring or automated billing. For those jobs you want dedicated accounting software (or a good accountant), and you pair it with your day-to-day tool.
A sensible split that works for most contractors:
- Billr for the daily loop: tracking time, raising invoices, getting paid, and managing clients and jobs.
- Accounting software or an accountant for the financial back end: logging expenses and receipts, reconciling the bank, VAT returns, and the year-end tax filing.
- A separate quoting habit if you send formal estimates, since Billr does not produce quote documents. Many trades quote in a short email or a simple template, then track and invoice the won job in Billr.
The point of naming the gap is trust. A tool that pretends to do everything usually does most of it badly. Knowing where your app stops and your accountant starts is itself a sign you are running a real business.
How it fits together: the one continuous loop
Walk a single job through the toolkit. You arrive at a rewire, tap the timer, and it runs offline in the basement all afternoon. The hours land against that client and project, ticking up the project budget bar so you know the job is on track. The week ends, you select the uninvoiced time, and it becomes a branded invoice with the right VAT in two taps. You send a pay link, the client pays by card, and the invoice marks itself paid. At month end, the earnings report tells you that client is your second best of the year. Then your accounting software, fed by exported figures, handles the VAT return.
That is the whole loop, and the value of an all-in-one is that the hours never get re-typed and nothing falls between two apps. Everything syncs across your phone on site, your laptop in the office, and the web wherever you are.
Frequently asked questions
What are the most important tools for contractors who are just starting out?
Start with the three that touch money directly: time tracking, invoicing, and online payments. If you capture your hours, turn them into clean invoices, and let clients pay by card, you have already fixed the biggest leaks. Client and project tracking come next, and dedicated accounting can wait until your turnover justifies it.
Do I need separate apps for time tracking, invoicing, and payments?
You can, but it usually means typing the same hours twice and exporting between tools. An all-in-one like Billr covers tracking, invoicing, payments, clients, projects, and reports in one place, so tracked time flows straight into an invoice and a pay link. You still pair it with accounting software for expenses, bank reconciliation, and tax filing.
Can Billr replace my accountant?
No, and it does not try to. Billr handles the operating side: tracking, invoicing, getting paid, and reporting. It is not full accounting software, so it does not log expenses, reconcile your bank, or file taxes. Most contractors run Billr day to day and hand the year-end figures to an accountant or accounting package.
What should a time-tracking tool do for a contractor on site?
It should start and stop in one tap, keep running with no signal, survive a phone restart, and tag every entry to the right client and job so the time can become an invoice line. If it loses an afternoon because you were in a basement, it is not built for the trade.
Does Billr send automatic payment reminders to my clients?
No. Billr's overdue reminders are push notifications to you, the contractor, at a time you choose, flagging that a bill is late. It does not send automatic chasers to your client, so how and when you follow up stays your call.
Key takeaways
- The back-office toolkit, not the van, decides whether you build a business. Time tracking, invoicing, and getting paid are the foundation.
- Track time first. Every downstream number, your invoice total, your true hourly rate, your profit, depends on honest hours.
- Don't re-type. Tracked time should flow straight into invoices, and invoices should carry a pay link so the money lands faster.
- Pick categories, then tools. Time tracking, invoicing, payments, clients, projects, reporting, and accounting are the seven that matter.
- Know the gap. Billr covers the daily loop; pair it with dedicated accounting for expenses, bank reconciliation, and tax filing.
If you want most of that toolkit in one place that works offline and syncs across every device, start tracking your time with Billr, watch those hours turn into paid invoices, and keep your accountant for the year-end. That is the back office of a real contracting business, minus the spreadsheets.