Sending a mobile invoice from the job beats sending one from your desk three weeks later, and the reason is simple: the value of your work is highest in the customer’s mind on the day you did it.
Why billing on the day works
An invoice that arrives while the customer is still pleased with the work gets approved quickly. One that arrives at month end competes with everything else in the inbox and feels like an old obligation.
There is a practical reason too. You remember the detail. What you actually did, how long it took, which extra the customer asked for halfway through. Three weeks later you are reconstructing it, and reconstructed line items are vague line items.
What works on a small screen
The sheet reflows for phones. The line-item table becomes a stack of cards, each row labelled, so you are not pinching to read a column heading.
A few things worth knowing:
- Text is set at 16px on phones, which stops iOS zooming in every time you tap a field.
- Touch targets are sized for thumbs rather than a mouse pointer.
- The toolbar moves above the sheet instead of sitting in a sidebar.
Nothing to install. It is a web page, so it opens the same on any phone.
The fastest way to bill from a job
Three minutes, if you have a saved template. Here is the order that works standing next to a van:
- Open your saved sheet with your own details already in it.
- Fill in the customer and what you did. Two or three lines is plenty.
- Check the total, then choose Print or save PDF and pick Save as PDF.
- Attach it to a message and send it before you drive off.
The third step is where people stall the first time. On a phone the print dialogue looks unfamiliar, but “Save as PDF” is in there, usually behind a destination or share option.
Save a template first
This is the difference between three minutes and fifteen. Fill in your business name, address, phone, tax number, bank details and payment terms, then save that as a file before you add any customer.
Every future invoice starts from it. There is more on what to fix and what to leave blank in a free invoice template you can edit.
Keeping the record
Nothing is stored for you. That is the deal here, and on a phone it needs a moment’s thought.
Save as file writes the sheet to your phone’s storage as a small .json file. Put those somewhere you will find them, and they reopen with everything in place, logo included.
If you skip that step you have the PDF you sent and nothing editable. Fine for a one-off. Painful when the same customer books you again.
A worked example
A mobile mechanic finishing a callout, billing before leaving:
Description Qty Rate Amount
Callout, Karen 1 2,500 2,500
Alternator belt, replaced 1 3,800 3,800
Labour, 1.5 hours 1.5 2,000 3,000
Subtotal 9,300
Total 9,300
Paid by M-Pesa on site. Receipt to follow.Three lines, typed on a phone, sent before the customer’s card is back in their wallet. The receipt referenced there is a separate document, which is worth understanding: see receipt or invoice.
Adding a photo of the work
You cannot attach a photo to the sheet, and that is deliberate: images would have to live somewhere, and nothing here leaves your browser.
What works instead is sending the photo alongside the PDF in the same message. For repair work, a picture of the old part next to the invoice line describing it prevents most queries.
Getting paid from the phone too
Add your payment details to the template so they are already on every invoice. If you take mobile money, put the number and the name it is registered to, since a mismatch is a common reason a payment does not arrive.
The sheet can also carry a QR code holding a payment link, placed at the top or the foot. On a phone-to-phone handover that is quicker than reading out an account number.
What a phone is not good for
Long itemised invoices. Twenty line items typed with thumbs is a bad evening.
For those, bill from a desk and use the phone for the short jobs it suits. The same saved file opens on both, so you are never re-typing.
Battery, not signal, is the limit
A phone that has been used all day for navigation, photographs and calls is a phone that dies during the print dialogue.
Save the sheet as soon as the document is complete rather than at the end of the day. A saved file survives a flat battery; an open tab does not. Invoicing without an internet connection covers the rest of the on-site routine.
Try it
Open the invoice maker on your phone now and fill in your own details. Save that file, and the next job takes three minutes. If you would rather work through the fields first, how to make an invoice covers each one in order.