T5018 Contractor Slip Penalty Calculator
Two things catch contractors every year: the T5018 slips nobody filed, and holdback receivable sitting in taxable income where it does not belong. Work out the penalty, the holdback adjustment, the deferred HST and the corporate tax on the corrected figure.
T5018 penalty exposure
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Holdback and the Corporate Return
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HST on Holdback
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The T5018 Penalty
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Points That Decide This
What to Do Next
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Disclaimer: Form T5018 is the Statement of Contract Payments, required from a business whose primary source of income is construction activities where payments are made to subcontractors for construction services. The information return is due within six months of the end of the reporting period, which may be the fiscal year end or the calendar year end at the filer’s election, and the basis chosen must be used consistently. The late filing penalty is $25 per day, with a minimum of $100 and a maximum of $2,500 per failure. Under subsection 12(1)(b) of the Income Tax Act, an amount is not included in income until the day on which it is receivable, and a holdback withheld under the Construction Act does not become receivable until it is certified for payment or the lien period expires. HST on the holdback portion follows the same timing, so the tax on the holdback is not payable until the holdback becomes due. Corporate tax is applied at the Ontario combined rate of 12.2% on active business income within the $500,000 small business limit and 26.5% above it. The standard statutory holdback under the Ontario Construction Act is ten percent. This page is general information, not tax advice.
Holdback Is Not Income Until It Is Certified
An amount goes into income when it becomes receivable, and a holdback withheld under the Construction Act is not receivable while it is being held. It becomes receivable when it is certified for payment or when the lien period expires, and not before.
That means the holdback sitting on the balance sheet at year end does not belong in taxable income, and the corporate tax on it is deferred until the year it is released. On a contractor billing a few million a year the deferral is worth real money.
| Billed and Certified | Holdback at 10% | Tax Deferred at 12.2% |
|---|---|---|
| $1,000,000 | $100,000 | $12,200 |
| $2,400,000 | $240,000 | $29,280 |
| $5,000,000 | $500,000 | $61,000 |
This is a deferral, not an exemption, and it works in both directions. The holdback released this year comes into income this year, and it is money earned in an earlier period arriving now. A contractor with a stable book of work sees the two roughly offset, which is exactly why the treatment is often ignored entirely.
The HST Follows the Same Timing
HST on the holdback portion is not payable until the holdback becomes due. That matters because contractors frequently remit HST on the full invoice including the holdback, funding tax on money they have not received and will not receive for months.
On a two point four million dollar year with a ten percent holdback, that is thirty-one thousand two hundred dollars of HST remitted early against nothing collected. It comes back eventually, but the cash is gone in the meantime and cash is what construction runs short of.
The holdback treatment only works if the books actually track it. A contractor who cannot show which receivable balance is holdback and when each piece was certified has no way to support the exclusion in an audit, and the whole amount goes back into income.
The T5018 Is Separate and It Is Easy to Miss
A business whose primary source of income is construction has to report payments to subcontractors for construction services on Form T5018. It is not optional and it does not depend on whether the subcontractor was incorporated.
The return is due six months after the end of the reporting period. You elect once whether to use the fiscal year or the calendar year and then stay with it, which is where the confusion usually starts, because the deadline is not aligned to the T2 or to the T4 season.
| Reporting Period End | T5018 Due |
|---|---|
| 31 December | 30 June |
| 31 March | 30 September |
| 30 June | 31 December |
| 30 September | 31 March |
The Penalty Is Per Failure and It Compounds
The late filing penalty is twenty-five dollars a day, with a minimum of one hundred dollars and a maximum of two thousand five hundred dollars per failure. One hundred days late reaches the cap, and after that the penalty stops growing on that return.
The exposure grows the other way instead, because the CRA can treat each unfiled year as a separate failure. A contractor three years behind is looking at three penalties, not one.
The bigger risk is not the penalty. It is what an unfiled T5018 tells the CRA about the subcontractors. The programme exists to match payments against the subcontractors’ own reported income, and a contractor who has never filed is a natural starting point for a review of whether those subcontractors were employees.
Subcontractor or Employee Is the Real Question Underneath
Filing the T5018 puts the payments on record. If those workers should have been employees, the slips make that visible, and the exposure moves from a two thousand five hundred dollar penalty to unremitted source deductions with interest and penalties across every worker and every year.
That is not a reason to avoid filing. It is a reason to settle the classification question first, because the exposure exists whether or not the slips go in and it grows quietly while nothing is filed.
- Who controls how and when the work is done
- Who provides the tools and the equipment
- Whether the worker can profit or lose on the job
- Whether the worker can subcontract or hire helpers
- How integrated the worker is into the business
- Whether the worker has other clients
What This Calculator Does Not Cover
- Percentage of completion accounting and the work in progress calculation
- Worker classification exposure, which dwarfs the penalty when it goes wrong
- WSIB clearance certificates for subcontractors
- Lien periods and certification timing under the Construction Act
- Provinces other than Ontario
- Non-resident subcontractors and Regulation 105 withholding
Get the holdback treatment right and the slips filed, in that order. Our construction accounting service covers the holdback tracking, the T5018 filings and the year end.
Frequently Asked Questions
Common questions on T5018 slips and construction holdbacks.
Related Calculators and Guides
More tools for contractors and construction companies.
Get the Holdback Right and the Slips Filed
Send us the contract schedule, the holdback balances and the subcontractor ledger. We will set up the holdback tracking, correct the HST timing, prepare the T5018 returns and file the outstanding years.