Invoice Koi Free generator

Invoicing for tilers

Invoice Koi is an invoice app for tilers, where the m² is the quote and the levelling and the tanking are lines of their own rather than an unexplained increase.

Make an invoice free
Get it on Google Play

The iPhone app is coming to the App Store.

An illustration of a notched trowel, a scatter of spacers, a tile cutter, a grout float and three tiles, with a koi swimming among them.

Tiling is priced per square metre right up until it is not: the floor that needed levelling, the wet room that needed tanking, the fifteen cuts around a window. The invoice has to show that work or it looks like the price went up for no reason.

01On the document

What tilers
put on an invoice.

Save these items with your own rates. Tap to add them to an invoice, with the unit, price and totals filled in.

LineUnit
Wall tilingm²
Floor tilingm²
Preparation and levellingm²
Tanking and waterproofingm²
Adhesive, grout and trimsjob
Additional labourhrs

Set your own prices. The app's starter rates are placeholders. To bill one job today with nothing installed, the free tiler invoice template opens in your browser with these lines on it.

A job, grouped Subtotals per section
PREPARATION
Preparation and levelling£380
Tanking and waterproofing£290
Subtotal£670
TILING
Floor tiling£940
Wall tiling£1,180
Subtotal£2,120
MATERIALS
Adhesive, grout and trims£365
Subtotal£365
Total£3,155
Grouped line items work on all nine templates.
A photograph of a tiler kneeling on a half-tiled bathroom floor, notched trowel down, phone in one hand.
Price book
Wall tilingm²
Floor tilingm²
Preparation and levellingm²
One tap puts the line on the invoice.
This job, grouped
PREPARATION£670
TILING£2,120
MATERIALS£365
Total£3,155
No signal needed. It is written here.
02Why tilers use it

Three things that
save the evening.

A rate per square metre, kept

Wall and floor rates in the price book with m² as their unit. Type the area, the line does the rest, and the totals resolve underneath.

Prep that shows on the document

Levelling and tanking under their own heading with a subtotal, so the extra day reads as work rather than as a bigger number.

Quoted then billed, once

The estimate converts to the invoice with the lines and the terms intact, so what you bill is what was agreed.

03 · Questions

Asked by tilers.

Can I invoice per square metre?

Yes. A price-book line carries its own unit, so m² sits alongside hourly labour and per-job materials on the same invoice.

How do I bill for unexpected preparation?

Add it as its own grouped section with a subtotal. The customer sees what the extra day was, not just a larger total.

Does the customer need an app?

No. They get a PDF, by email or through any messaging app. There is no portal and nothing for them to sign up to.

Weighing up apps? Invoice Koi vs Joist and Invoice Koi vs Contractor+ set the features side by side, including where they win. Or see all 12 comparisons.

Make an invoice free
Get it on Google Play

The iPhone app is coming to the App Store.

Already have it? Open it