Payment questions look like accounting, but they are really contract questions with arithmetic attached. Under CCDC 2 (2020), the contractor applies monthly, the Consultant certifies the amount properly due within 10 calendar days, and the owner pays within 28 calendar days of the application. A holdback set by the applicable lien legislation is kept back until release. This guide from Examitect, an independent ExAC prep platform unaffiliated with the CACB, covers Part 5 of the General Conditions, the architect's liability in certifying, and a worked certificate, line by line.
| Exam section | Section 4, about 130 multiple-choice questions |
|---|---|
| Objectives | 10.2.4 payment tasks, 10.3.1 complete a certificate for payment |
| Contract | CCDC 2 (2020), Articles A-4 and A-5, GC 5.1 to GC 5.7 |
| Certify | Within 10 calendar days of the application (GC 5.3.1.1) |
| Pay | Within 28 calendar days of the application (GC 5.3.1.2) |
| Holdback rate | Set by the applicable lien legislation, not by CCDC 2 |
Payment sits in theme 10, Construction Phase, Office, one of the four Section 4 themes in the ExAC Framework Document. Appendix 1 of the 2026 Preparation Guide gives it two specific objectives: 10.2.4 (p.20), "Explain the tasks associated with payment for the work," and 10.3.1 (p.21), "Complete a certificate for payment."
"Complete" is the important verb: expect to fill in the form, not just describe it. Appendix 3 of the Guide (p.33) lists the two documents behind these questions, CCDC 2 (2020) and CCDC 24, Guide to Using Model Forms and Supporting Documents (1996). In CCDC 2, payment lives in the Agreement and in Part 5 of the General Conditions:
| Provision | What it settles |
|---|---|
| Article A-4 | The Contract Price excludes Value Added Taxes, which are stated on a separate line. |
| Article A-5 | Progress payments in the amount certified, holdback "in accordance with legislation and statutory regulations respecting holdback percentages", and late-payment interest. |
| GC 5.1 to GC 5.3 | Owner's financing information, applications for payment, and payment |
| GC 5.4 and GC 5.5 | Substantial Performance and holdback, then final payment |
| GC 5.6 and GC 5.7 | Deferred work, and non-conforming work |
Two CCDC 2 definitions point outside the contract. Payment Legislation is the legislation at the Place of the Work that governs payment under construction contracts, and Substantial Performance of the Work "is as defined in the lien legislation applicable to the Place of the Work." That is why a national exam tests the mechanism, not one province's numbers.
The process starts with the contractor. GC 5.2 sets the rules:
CHOP Chapter 6.6 says the schedule of values is usually broken down by divisions, major subtrades or quantifiable elements, and that the architect should review it for "an accurate and realistic distribution of cost", comparing it with the latest estimate. In our view this is the architect's first real control point, because every monthly percentage is measured against it. Change Orders join the same channel: GC 6.2.2 includes the value of change work in the progress applications.
GC 2.2.4 gives the Consultant the job: based on observations and evaluation of the applications, determine the amounts owing and issue certificates for payment. CHOP Chapter 6.6 describes the practice. The architect does a field review to check the claimed percentages, discusses differences with the contractor, and relies on the engineering consultants to attest to the value of their portions. GC 5.3 and GC 5.5 set the deadlines:
| Step | Who | Deadline | Source |
|---|---|---|---|
| Certificate for payment | Consultant | No later than 10 calendar days after receipt of the application | GC 5.3.1.1 |
| Notice of reasons for a revised amount | Owner | Promptly, in compliance with Payment Legislation | GC 5.3.1.1 |
| Progress payment | Owner | On or before 28 calendar days after receipt of the application | GC 5.3.1.2 |
| Final certificate | Consultant | Review within 10 calendar days of the final application | GC 5.5.2 |
| Final payment | Owner | No later than 5 calendar days after the final certificate | GC 5.5.4 |
The certificate may be "in the amount applied for, or in such other amount as the Consultant determines to be properly due." If the amount differs, CCDC 2 (2020) puts the written notice of reasons on the Owner, not the Consultant, which makes a good distractor.
Late payment has consequences. Article A-5 sets interest at 2% per annum above prime for the first 60 days and 4% above prime after that, compounded monthly. Under GC 7.2.3, the contractor may give Notice in Writing of default if the Consultant fails to issue a certificate or the Owner fails to pay a certified amount, and GC 7.2.4 then allows it to suspend the Work or terminate the Contract if the default is not corrected within 5 Working Days.
The form comes from CCDC 24. We checked the 2016 edition, written for CCDC 2 (2008); the exam lists the 1996 edition, so cite CCDC 2 (2020) clause numbers. Its Certificate for Payment has a certification statement, a Contract Summary and a Certification Summary, and the worked example below follows its lines.
A certificate for payment is a professional statement, and both contracts around the architect define its limits. In CCDC 2 (2020):
In RAIC Document 6 (we checked the 2022 edition; the exam lists 2018, revised 2021), GC 5.5 makes a certificate a representation to the Client, based on General Review and the contractor's schedule of values and application, that the Work has progressed to the value indicated, that the Work observed is in general conformity with the Construction Contract, and that the contractor is entitled to the amount certified. GC 5.6 says it is not a representation about how the contractor used the money. Schedule A lists Payment Certification as service 9.19.
CHOP Chapter 3.8 describes contract administration as a phase prone to many risks that expose the architect to claims. Its controls include an "adequate assessment of the contractor's application for payment" and care in issuing the Certificate of Substantial Performance, which cannot be rescinded once issued and starts the timing for holdback release. CHOP Chapter 6.7 adds that holdback is a trust fund that cannot be used to force performance, and that payment for known deficiencies should never be certified until the work is acceptable.
In our view the trade-off is simple: over-certifying pays for work that is not there with the client's money, while certifying late exposes the owner to interest and a default notice. The shop drawings, RFIs and site instructions post covers the architect's other construction paperwork.
CHOP defines holdback as a percentage of the amount payable, held as security for a period, with "the percentage and period" based on provincial lien legislation. CCDC 2 (2020) prints no percentage either. So the exam answer to "what sets the holdback rate?" is the applicable lien legislation, and any figure in a calculation will be given to you. The CCDC 2 mechanism is GC 5.4:
CHOP Chapter 6.7 adds the architect's side: date the release certificate for payment one day after the lien claim period ends, and advise the owner to have legal counsel confirm that no liens are registered, rather than doing that legal check yourself.
CHOP 6.7 calls Substantial Performance regulatory and Ready-for-Takeover the contractual term CCDC adopted for consistency. In CCDC 2 (2020), certified Substantial Performance is the first of eight prerequisites to Ready-for-Takeover in GC 12.1.1, and the one-year warranty runs from Ready-for-Takeover (GC 12.3.1). A question that starts the warranty at Substantial Performance is testing the difference.
When the Work is complete, the contractor applies for final payment, the Consultant reviews within 10 calendar days and issues a final certificate, and the Owner pays no later than 5 calendar days later (GC 5.5). For deferred work, the Owner may withhold only what the Consultant decides is enough to finish it (GC 5.6). And no payment, use or occupancy is an acceptance of non-conforming work (GC 5.7).
This is our own illustrative example, not a real exam question. The 10% holdback and 5% Value Added Tax rates are example figures, not a statement of any province's law; on the exam, use the rates the question gives.
The facts. The Contract Price is $2,400,000 before taxes, and Change Order No. 1 adds $36,000. Certificate No. 5 valued the work at $870,000 and retained $87,000, so it certified $783,000. Application No. 6 is dated June 30 and arrives on July 2. The architect's field review, with the mechanical engineer's input, trims two lines:
| Schedule of values line | Value | Claimed | Certified |
|---|---|---|---|
| General requirements | $240,000 | 45% = $108,000 | 45% = $108,000 |
| Substructure | $300,000 | 100% = $300,000 | 100% = $300,000 |
| Structure | $520,000 | 80% = $416,000 | 75% = $390,000 |
| Exterior envelope | $460,000 | 35% = $161,000 | 35% = $161,000 |
| Interiors | $380,000 | 0% | 0% |
| Mechanical | $330,000 | 25% = $82,500 | 20% = $66,000 |
| Electrical | $170,000 | 15% = $25,500 | 15% = $25,500 |
| Change Order No. 1 | $36,000 | 50% = $18,000 | 50% = $18,000 |
| Total | $2,436,000 | $1,111,000 | $1,068,500 |
Now fill in the CCDC 24 Certificate for Payment, using its line numbers:
| Line | Item | Amount |
|---|---|---|
| (1) | Original Contract Price | $2,400,000.00 |
| (2) | Change Orders (No. 1) | $36,000.00 |
| (3) | Current value of Change Directives | $0.00 |
| (4) | Value of Contract (1+2+3) | $2,436,000.00 |
| (5) | Value Added Taxes at 5% | $121,800.00 |
| (6) | Total payable for the Work including taxes (4+5) | $2,557,800.00 |
| (7) | Value of Work performed and Products delivered | $1,068,500.00 |
| (8) | Total holdback at 10% | $106,850.00 |
| (9) | Holdback released | $0.00 |
| (10) | Holdback retained (8-9) | $106,850.00 |
| (11) | Amount (7-10) | $961,650.00 |
| (12) | Amount from previous certificate (No. 5) | $783,000.00 |
| (13) | Contract Price payable this period (11-12) | $178,650.00 |
| (14) | Value Added Taxes at 5% | $8,932.50 |
| (15) | Total payable this period (13+14) | $187,582.50 |
The claim of $1,111,000 would have given $216,900 before tax. The certificate is $38,250 lower: the $42,500 the architect did not accept, less its 10% holdback. Because the amounts differ, the Owner owes prompt written reasons under GC 5.3.1.1. The certificate is due by July 12 and payment by July 30, 10 and 28 calendar days after receipt. Had the lien legislation allowed a $30,000 progressive release on the finished substructure, line (9) would read $30,000 and the pre-tax amount payable would rise by $30,000.
Work any certificate question in this order:
Add approved Change Orders and the certified value of Change Directives to the original Contract Price, excluding taxes.
Apply the certified percentage to each schedule of values line and add them up, including change work.
Multiply the total value of work to date by the holdback rate the question gives.
Subtract any progressive release to find the holdback retained.
The value of work less retained holdback, less the amount previously certified, is the Contract Price payable this period.
Apply the tax rate to the amount payable this period, because the Contract Price excludes taxes.
Count 10 calendar days to the certificate and 28 calendar days to payment, both from receipt of the application.
The common errors map onto those steps: holdback on this month's work only, tax added before holdback, no deduction for the previous certificate, and 28 days counted from the certificate. Our post on where Section 4 candidates lose the most marks covers the wider pattern, and schedules, change orders and closeout ties payment to the rest of the construction phase.
A certificate for payment is the document in which the Consultant, usually the architect, states the amount properly due to the contractor after reviewing an application for payment. GC 2.2.4 and GC 5.3 of CCDC 2 (2020) require the Consultant to determine the amounts owing and issue the certificate to the Owner, with a copy to the Contractor.
Under GC 5.3.1.1 of CCDC 2 (2020), the Consultant issues the certificate no later than 10 calendar days after receiving the application for payment. Under GC 5.3.1.2, the Owner pays on or before 28 calendar days after the Owner and the Consultant received the application, and in any event in compliance with Payment Legislation.
CCDC 2 (2020) does not set a holdback percentage. Article A-5 applies the holdback "in accordance with legislation and statutory regulations respecting holdback percentages", and CHOP defines the percentage and period as based on the provincial lien legislation. On the ExAC, use the rate the question gives you.
Take the total value of work performed and Products delivered to date, subtract the holdback retained on that total, then subtract the amount of the previous certificate. The result is the Contract Price payable this period, and Value Added Taxes are added to it last, following the CCDC 24 Certificate for Payment form.
Under GC 5.4.3, subject to Payment Legislation, the holdback becomes due no later than 10 Working Days after the holdback period in the applicable lien legislation expires. The contractor applies for it through GC 5.3, and GC 5.4.5 allows earlier release of part of the holdback where legislation permits progressive release.
Substantial Performance is defined by the lien legislation at the Place of the Work and is tied to holdback release. Ready-for-Takeover is a CCDC 2 (2020) contract milestone with eight prerequisites in GC 12.1.1, the first being certified Substantial Performance. The one-year warranty in GC 12.3.1 runs from Ready-for-Takeover.
A certificate for payment is a professional representation by the architect to the client, not a guarantee of the work. GC 2.2.16 of CCDC 2 (2020) limits certificates to the Consultant's knowledge, information and belief, and RAIC Document 6 GC 5.5 and 5.6 set out what a certificate does and does not represent to the client.
Paying a certificate does not mean the owner accepts the work. GC 5.7 of CCDC 2 (2020) says no payment by the Owner, and no partial or entire use or occupancy of the Work, is an acceptance of any Work or Products that do not conform to the Contract Documents.