The tiles are down, but the hours have disappeared into one timesheet and the unused adhesive is back in the van. Tiler job costing fixes that by assigning labour, materials and rework to the stage that used them.
Set the accepted scope before opening the cost sheet
Cost the work against the scope the client accepted. Otherwise, you cannot tell whether the job ran over or the scope was never clear enough to measure.
Start with the quote and site notes. Record the rooms, surfaces and tile areas covered by the price. Note the substrate condition you could inspect. State what preparation was included and what could not be confirmed before demolition or strip-out.
Before work starts, freeze the tiler job costing baseline. Enter the allowed preparation labour, installation labour, materials and other direct costs from the internal estimate behind the accepted quote.
Do not change that baseline to match what happens on site. Record actual costs beside it so the preparation and installation variances remain visible.
For a bathroom, the record might cover wall tiling, floor tiling, set-out, cutting, grouting and silicone work. It should also say whether removal, grinding, patching, levelling, waterproofing, protection and disposal sit inside the accepted price.
Do not turn this into a fresh quote after the job. Use the accepted document. If the scope is still being prepared, use the bathroom tiling quote guide before costing starts.
Record the condition and preparation allowance
Write down what the quote assumed about the substrate. Photos help, but the note still needs words a tradie can understand later.
Record whether the surface was expected to be sound, clean, level and ready for the specified system. If the quote allowed some grinding or patching, identify that work. Do not leave it buried inside “standard preparation”.
The old finish may come off and expose a floor that needs more grinding, patching or levelling than the accepted scope allowed. That is the moment to stop and compare the condition with the quote. Do not wait until the floor is ready for tile.
Separate inclusions, exclusions and client-supplied items
Mark client-supplied tiles separately from materials you supplied. The tiles may not be your purchase cost, but handling, sorting, checking, cutting and dealing with shortages still consume labour.
List exclusions that affect who pays. Examples include hidden substrate repairs, chasing, structural work, asbestos work, plumbing changes and electrical work. The exclusion tells the crew when to stop rather than absorb extra work.
Check the permitted scope before accepting the work
Ask your state or territory building regulator which licence class covers the tiling, waterproofing or building work you plan to contract and perform. Write down the answer against the job rather than assuming the rules are the same across Australia.
Check workplace safety duties with the WHS regulator for the state or territory where the site is located. Keep safety checks separate from the cost sheet, but assign job-specific protection, setup and disposal costs where your method treats them as direct job costs.
Build tiler job costing fields around the work
Do not create headings that mix work stages, cost types and reasons for the cost. That makes the same adhesive or labour hour easy to enter twice.
Give every cost entry three fields:
- Cost type: labour, materials or other direct cost
- Stage: preparation or installation
- Status: accepted scope, variation, rework or investigation
Each entry gets one value in each field. Extra grinding might be labour, preparation and variation. Adhesive used to replace failed work might be materials, installation and rework.
Use investigation only while the cause and responsibility are unknown. Once they are established, reclassify the cost as accepted scope, variation or rework so no completed job carries a temporary status.
Use the same three fields in the quote worksheet, timesheet and close-out, and keep them with the job management page for tilers. If the office and crew use different labels, the comparison will fail.
Code preparation work by type and status
Preparation can include site protection, strip-out, cleaning, grinding, patching, screeding, levelling and substrate repairs. Mark the stage as preparation, then record labour, materials and other direct costs as separate entries.
Give each entry a status. Work inside the quote is accepted scope. Approved extra preparation is a variation. Work repeated because of an error or failed finish is rework.
Code installation work by type and status
Installation can include measuring, set-out, mixing, cutting, laying, edge finishing, grouting, silicone work and final cleaning. Mark the stage as installation and enter each cost once under its correct type and status.
The tile set-out may create more cuts and handling time than the labour allowance assumed. Add a short note about the format, pattern, room shape or trim detail. The hours alone do not explain why the cost moved.
Decide which supporting work is a direct cost
Choose how the business treats travel, material collection, unloading, setup, protection, cleanup and disposal. If these tasks are direct job costs, assign them to the job every time. If they sit in overhead, do not add them only when a job looks weak.
Consistency matters more than fancy categories. Changing the method from job to job makes comparison useless.
Capture tile labour costs by stage
Tile labour costs come from the time used and what one labour hour costs the business. They do not come from the amount charged to the client.
Labour cost equals recorded job hours multiplied by the business’s consistently calculated labour cost for that worker or labour class. Use that internal labour cost in tiler job costing, not the charge-out rate billed to the client.
Put every worker against one job and one stage
Use the same job identifier on the quote, timesheets, purchase records, variations and invoice. A time entry without a job identifier becomes overhead or disappears during close-out.
Ask each worker to record the stage when the task changes. Preparation before lunch and laying after lunch should not become a full day of installation.
Include working owners and supervisors when they perform or directly manage job work. Their time is still consumed by the job even when it does not appear on a payroll entry in the same way as an employee’s time.
Record delays without calling them productive work
Keep delay time against the job, but identify the cause. Waiting for site access, another trade, client decisions or missing materials tells you something different from slow installation.
Do not automatically bill a delay or treat it as a variation. First check the accepted scope and who must pay. The cost record describes what happened. The contract and approved documents determine what can be charged.
Compare allowed time with actual time promptly
Review labour while the crew still remembers the room. Ask what changed. Get a concrete answer such as extra grinding, repeated cuts, access restrictions or a set-out decision.
“Job took longer” teaches you nothing. A stage and a cause give you something to adjust.
Assign tiling material costs to the job
Tiling material costs include more than tile purchases. Record the products and consumables the job actually used, whether they came from a supplier, the workshop or the van.
Depending on your scope, the list may include tiles, adhesive, grout, primers, levelling products, trims, membranes, sealants, spacers, clips, mixing consumables, cutting consumables and protection materials. Only assign an item when your costing method treats it as a direct job cost.
Match purchases to the job identifier
Put the job identifier on supplier orders, receipts and purchase records. Record delivery charges or collection costs under the category your business has chosen.
Check that credits and returns carry the same identifier. A supplier credit sitting in the general account will not repair an overstated job cost.
Cost stock taken from the van or workshop
Stock already paid for is not free. When adhesive, grout, trims or consumables leave the van for a job, enter their cost against that job.
Use your inventory-cost method consistently. The key action is recording the movement. Do not wait for a supplier invoice because there may not be a new one.
A tiler may open extra adhesive or grout and return part bags and full boxes to the van. Record what came back and where it was stored. Without that step, the current job carries too much cost and the next job receives stock at no cost.
Credit usable returns and keep consumed products on the job
For a supplier return, credit the job with the actual credit received. When usable material returns to a labelled van or workshop location, credit it using the business’s consistent inventory-cost method.
Opened products, damaged tiles and unusable offcuts stay on the job when they cannot return to usable stock. Do not remove their cost merely because they were not installed.
Part products need a clear rule. If the remainder can be identified, stored and used, return it to a named van or workshop location under that rule. If it will dry out, become contaminated or disappear loose in the van, leave it as consumed job cost.
Record wastage without hiding the cause
Wastage is not one problem. Some cutting is part of the planned set-out. Breakage, damage, wrong ordering and poor handling are different causes.
Record the product, quantity or cost and reason. Keep the explanation short enough to use on site.
Split planned cutting from avoidable loss
Tiles cut around corners, wastes and penetrations may sit within the planned material allowance. Enter the material cost once, mark the stage as installation and give it the accepted-scope status.
Tiles broken through handling, damaged after laying or ordered incorrectly need their own reason. This does not mean blaming a worker. It means finding the process that used the material.
Do not invent a standard wastage percentage after the job to make the purchase total look normal. Compare the quantity allowed in your quote with the quantity consumed and returned.
Note the tile and set-out constraints
Large formats, patterns, batch limits, fragile finishes and repeated edge cuts can change both labour and usable yield. Put the constraint beside the cost variance.
That note helps the estimator understand why another room with the same measured area may need a different allowance. Area alone does not describe the cutting work.
Return reusable stock properly
Give full boxes, trims and reusable products a named van or workshop location. Mark the job credit at the same time. A vague note saying “back in van” is not enough.
If the stock cannot be found for the next job, it was not really returned. It was lost between two jobs.
Split approved variations from unpaid rework
A client-approved scope change is not rework. Work repeated because of an error, damage or failed finish is not a client variation.
Mixing them makes a costly job look better than it was. It can also put unapproved work onto the final invoice.
Stop when the accepted scope changes
Stop when hidden preparation or a client decision changes the work. Describe the condition or request. State the extra labour and materials, and say whether the variation moves the finish date.
Price the extra work and get approval before completing the work that depends on it. Use the word variation. Keep the approval under the original job identifier.
Enter the variation’s labour, materials and other direct costs with variation status. Otherwise, the larger invoice can make the job look profitable even when the extra work consumed the extra revenue.
Record rework by cause
Log the labour, replacement materials, disposal and other direct costs needed to remove and repeat finished work. Add the cause: set-out error, damaged finish, failed bond, wrong product, site damage or another specific event supported by the job record.
Do not hide the hours inside accepted-scope installation. That will only make the installation allowance look too small on the next quote.
If you need to inspect a reported defect before deciding who pays, use the tiler call-back inspection process. An inspection record is not an admission that the original work caused the issue.
Link later call-backs to the original job
Keep a call-back under the original job identifier even when the invoice has already been sent. Open an investigation entry and record the new labour, materials and disposal.
Once the cause and responsibility are established, reclassify the investigation cost. Use rework when the original work caused the issue, accepted scope when the cost belongs to unfinished quoted work, or variation when new chargeable work is approved.
Do not create an unrelated service job just to make scheduling easier. The original job must carry the cost if the work is your responsibility. If the visit finds a new, chargeable issue, document and approve that work separately.
Close the job and calculate tile job profit
A tiler job costing close-out starts when physical work finishes. Collect the final timesheets, supplier invoices, stock movements, disposal records, variation costs and rework entries.
Original-scope cost is the labour, materials and other direct costs marked as accepted scope. Variation cost is the labour, materials and other direct costs marked as variation. Total completed-job cost is the original-scope cost, variation cost and rework cost added together.
Profit equals revenue minus job cost. Margin equals profit divided by revenue. Markup equals profit divided by job cost. Use the same GST basis for revenue and costs, and remember that a result calculated before overhead is deducted is not net profit.
Calculate original-scope profit using original quoted revenue and original-scope cost. Calculate completed-job profit using total completed-job revenue and total completed-job cost, but include variation revenue and variation costs only when both are recorded.
Worked example: keep the arithmetic on the right document
Oak Street is the house electrical example used only to show the arithmetic. All figures are sample currency units, not an AUD rate card.
R. Chen’s job at 14 Oak Street covered a bathroom exhaust fan, 150mm and ducted through the roof, plus four LED downlights. Quote Q-1847 was 1,105. The ceiling was lined and the quote excluded chasing.
Extra cable and chasing were approved on site as a 160 variation. Invoice INV-1847 was therefore 1,265.
The original-scope job cost was 850. Profit measured against the original quote was 1,105 − 850 = 255. Margin was 255 ÷ 1,105, which is about 23%. Markup was 255 ÷ 850, which is 30%.
Do not calculate profit using the 1,265 invoice and the 850 cost. The costs of the 160 variation are not given. Combining them would invent a profit result that the records do not support.
Apply the same rule to a tiling job. Compare the original quoted work with its original-scope costs. Compare each approved variation with its own costs once those costs are complete. Keep unpaid rework visible rather than using variation revenue to cover it.
Turn the close-out into the next tiling quote
Tiler job costing earns its keep when it changes the next estimate. Review the variance by stage rather than applying one increase across the whole job.
If preparation exceeded the allowance, read the site notes. Decide whether the inspection missed a visible condition, the accepted scope was vague or hidden work became an approved variation. Change the next inspection question or preparation allowance to match the cause.
If installation labour ran over, look at the tile format, set-out, cuts, access and finishing detail. Adjust the labour allowance for that work. Do not raise the material allowance to hide a labour problem.
If tiling material costs ran over, reconcile purchases, van stock, returns and wastage reasons. Correct the quantity take-off where the estimate was wrong. Fix stock handling where usable materials disappeared.
Use the tiler job costing record to find the process behind rework before changing the selling price. A higher selling price does not correct poor substrate checks, unclear set-out approval or missing product records.