What's involved in a Privacy Impact Assessment: inputs, timeline, and cost?

What is a Privacy Impact Assessment, and what does it actually produce?

A Privacy Impact Assessment is a risk-management process that documents how a program, product, or system collects, uses, discloses, retains, and disposes of personal information, then evaluates the privacy risks against legal requirements and recognised privacy principles. The Office of the Privacy Commissioner of Canada (OPC) describes a PIA as a process that helps institutions ensure they meet legislative requirements and identify the impacts their programs and activities will have on individuals' privacy. The Canada Revenue Agency similarly defines it as a process used to determine how a program or service could affect the privacy of an individual.

The output is a written report your organisation can act on and share with stakeholders. It typically contains a project description, a data flow analysis, a risk assessment mapped against privacy principles, and a set of recommendations and mitigations with owners. It is important to understand that the OPC does not approve, endorse, or sign off on PIA reports — the assessment is your organisation's own due-diligence document, not a regulator-issued certificate. Its value is surfacing real risks early, demonstrating accountability, and giving you a defensible record of the decisions you made.

What inputs do you need to start a PIA?

A PIA moves only as fast as the information you can provide. Before kickoff, gather the materials that describe what the system does and how personal data moves through it. The more concrete these inputs are, the shorter and cheaper the assessment, because the assessor spends less time chasing missing details.

• A clear project or product description: what it does, who uses it, and the business purpose it serves.
• A data inventory and data flow map — what personal information you collect, the categories of individuals, why each element is collected, where it is stored and processed, who can access it, which third parties or sub-processors touch it, and any cross-border transfers.
• The legal basis and authority for each collection, use, and disclosure (for example, consent, a contract, or a statutory mandate), plus retention and disposal rules.
• System and architecture details: integrations, hosting region, and the security safeguards already in place (encryption, access controls, logging).
• Existing documentation — privacy notices, vendor contracts, prior assessments, and any data-sharing agreements.
• The right people's time: a project owner, a technical lead who understands the data flows, and someone who can speak to the legal and contractual context.

How is the privacy risk actually analysed?

The risk analysis tests your data handling against established privacy principles, then rates and prioritises the gaps. In the Canadian public-sector context, the OPC frames this analysis around principles drawn from the OECD privacy guidelines — accountability, limiting collection, retention, accuracy, secure disposal, limiting use and disclosure, safeguards, openness, and individual access. A good PIA walks each principle against your actual data flows and asks where the system falls short.

Practically, the assessor identifies each risk — for example, collecting more data than the purpose requires, an over-broad retention period, or a vendor with unclear safeguards — rates its likelihood and impact, and recommends specific mitigations with an owner and a target date. The result is not a pass-or-fail grade but a prioritised action plan, so you can fix the highest-risk items before launch and accept or monitor the lower ones with eyes open.

How long does a PIA take?

Timelines vary with scope, but a realistic range runs from roughly two to three weeks for a narrow, well-documented system to two to three months for a complex program touching many data flows, vendors, or jurisdictions. The single biggest driver of the schedule is how ready your inputs are: a clean data flow map and available stakeholders can halve the elapsed time, while reconstructing undocumented data flows from scratch can double it.

A typical PIA moves through a few phases: scoping and kickoff, information gathering and data flow mapping, risk analysis against privacy principles, drafting findings and recommendations, and a review cycle with your team. Public-sector mandates reinforce doing this early — under British Columbia's FOIPPA, PIAs are mandatory for public bodies and must be completed during development, before a system launches. The same timing logic applies to any organisation: a PIA done early, while the design can still change, is faster and far cheaper than one done after build, when fixes mean rework.

What does a PIA cost, and what drives the price?

There is no single fixed price for a PIA, because cost tracks scope rather than a fixed line item — a focused assessment of one well-understood system costs far less than an enterprise program spanning multiple products, vendors, and jurisdictions. Rather than quote a figure that would not fit your situation, it is more useful to understand the drivers so you can scope sensibly and get an accurate quote.

Privacy Horizon scopes each PIA to the system in front of it and provides a tailored quote after a short consultation. The only fixed published prices we list are Minimum Viable Privacy at CAD $5,499 per year and the Virtual Privacy Officer starting at CAD $2,200 per month, both of which are different services from a standalone PIA.

• Scope and complexity — the number of systems, data flows, user types, and processing purposes covered.
• Data sensitivity — health information (PHIPA), financial data, or children's data demands deeper analysis than low-risk data.
• The number of vendors, sub-processors, and cross-border transfers that must be reviewed.
• How well the inputs are documented — undocumented data flows mean more discovery time.
• Jurisdictions in play — multiple provincial, federal (PIPEDA), or international regimes (such as Quebec's Law 25 or the GDPR) widen the legal analysis.
• Whether you need a one-time assessment or an ongoing relationship that re-runs the PIA as the product evolves.

Does your organisation actually need a PIA?

If you are a federal or provincial public body, a PIA is often legally required. The federal Treasury Board (TBS) Standard requires PIAs when personal information is used in decisions affecting individuals or for major program changes; the CRA conducts them under the Treasury Board Directive on Privacy Impact Assessment; and British Columbia requires them under FOIPPA section 69 before a system goes live.

Most private-sector organisations are not directly bound by those government PIA mandates — they apply to public bodies — but the same methodology is widely treated as best practice, and is increasingly demanded by enterprise, healthcare, and government buyers and by regimes such as PHIPA and Quebec's Law 25. If you are launching a new product, adopting AI, moving sensitive data to a new platform, or selling into healthcare or government, a PIA is the cleanest way to find and fix privacy risk before it becomes a contractual blocker or a breach.