CRA Net Worth Reassessment: How CRA Builds Its Case and How to Challenge It

A net worth reassessment is the CRA’s bluntest instrument. When the CRA believes a taxpayer has unreported income and cannot verify it through the usual methods (matching T-slips, reviewing bank deposits, examining books and records), it calculates income indirectly. The auditor compares the taxpayer’s net worth at the beginning of the year to their net worth at the end, adds personal expenditures, subtracts known non-taxable sources, and treats the unexplained difference as unreported income. The method is crude, the math is often wrong, and the burden of proof shifts in a way that surprises most people. This page covers how the CRA builds a net worth case, where the errors typically hide, and how to challenge one.

How does the CRA build a net worth case?

The formula is straightforward in concept:

Unreported income = (Net worth at year-end minus net worth at year-start) + personal expenditures during the year minus reported income minus known non-taxable sources

The auditor builds a schedule covering every year under assessment (often three to five years). For each year, the schedule lists:

Assets at year-end: bank balances, investment accounts, real estate (at cost or appraised value), vehicles, RRSPs, business assets, personal property of significant value, cash on hand.

Liabilities at year-end: mortgages, lines of credit, credit card balances, loans, CRA balances owing, other debts.

Net worth = assets minus liabilities. The increase in net worth from one year to the next represents the taxpayer’s accumulation of wealth during the year.

Personal expenditures: the CRA estimates what the taxpayer spent on living expenses: rent or mortgage payments, utilities, groceries, insurance, vehicle costs, travel, children’s activities, clothing, entertainment, gifts, and everything else. The CRA uses a combination of actual spending data (from bank statements and credit cards), Statistics Canada averages, and the taxpayer’s own estimates.

Known sources: the CRA subtracts reported income (T1 line 15000), inheritances, gifts, insurance proceeds, tax-free windfalls, non-taxable portions of capital gains, and any other amount the taxpayer can prove was not income.

Whatever remains after the subtraction is the “discrepancy,” and the CRA treats it as unreported income for that year.

Who gets a net worth assessment?

The CRA uses net worth assessments primarily against:

Cash-intensive businesses. Restaurants, bars, construction contractors, taxi and rideshare drivers, retail shops, hair salons, and any business where a significant portion of revenue comes in cash. The CRA’s risk models flag businesses whose reported income seems low relative to industry norms or the owner’s visible lifestyle.

Lifestyle indicators. A taxpayer reporting $40,000 in income who owns a $1.2 million home, drives a new luxury vehicle, and takes international vacations will attract attention. The CRA’s matching systems cross-reference property records, vehicle registrations, and travel data against reported income.

Informant tips. The CRA’s informant program (Leads Program) receives tips from former spouses, disgruntled employees, business partners, and competitors. A tip that “this person is living well beyond their reported income” can trigger a net worth audit.

Missing or inadequate records. If the CRA audits a business and the books are incomplete, the auditor may switch to the net worth method because direct verification is not possible.

The method is authorized by ITA 152(7), which allows the CRA to assess tax “as the Minister considers appropriate in the circumstances” when the taxpayer has not filed or the CRA is not satisfied with the information provided. The Federal Court of Appeal confirmed in Venne v. The Queen, [1984] 1 FC 888, that the CRA can use net worth when “direct verification of income is impossible.”

Where are the errors in the CRA’s math?

Net worth assessments are frequently wrong, and the errors tend to be systematic:

Overstated personal expenditures. The CRA often uses Statistics Canada averages for living expenses when it does not have actual data. These averages may overstate what the taxpayer actually spent. A family of four in a major city is assigned a standard grocery cost, clothing cost, and miscellaneous spending amount that may bear no relationship to their actual frugal lifestyle. Every dollar of overstated expenses inflates the unreported-income number by a dollar.

Understated opening net worth. If the CRA underestimates what the taxpayer owned at the start of the assessment period, the increase in net worth (and therefore the inferred income) is overstated. The most common version: the taxpayer had cash savings from before the assessment period (inherited money, savings from a previous career, money brought from another country) that funded the asset purchases the CRA attributes to unreported income. If the taxpayer cannot prove the pre-existing cash, the CRA treats every asset acquisition as funded by current-year income.

Double-counting. If the CRA includes a mortgage payment as a personal expenditure and also counts the reduction in the mortgage balance as an increase in net worth, the same payment is counted twice. The auditor’s schedule should net the mortgage principal reduction against the expenditure, but errors happen.

Ignoring non-taxable sources. Gifts from family (common in immigrant families where parents transfer savings to children), inheritances, insurance proceeds, loan proceeds, and return of capital are all non-taxable. If the taxpayer received $50,000 from a parent overseas and used it to buy a car, the CRA may treat the car purchase as evidence of unreported income unless the taxpayer proves the gift. The proof requirements can be difficult: a wire transfer from a foreign relative is easy to document, but a cash gift from a parent who visited and handed over an envelope is not.

Asset valuation errors. The CRA may use the purchase price of a property as the year-end value, ignoring that the purchase was partially financed. Or it may use a property tax assessment value that bears no relationship to fair market value. Investment accounts may be valued at market value without netting unrealized gains (which are not income until realized).

What is the burden of proof?

This is the part that surprises people. In a normal reassessment, the CRA has the initial burden to justify its assumptions (Hickman Motors v. Canada, 1997 SCC). But in practice, once the CRA produces a net worth schedule, the burden shifts to the taxpayer to explain where the money came from. The CRA does not need to prove that you earned unreported income from a specific source; it only needs to show an unexplained increase in wealth. You then need to explain the increase with documented evidence.

This is a significant burden for several reasons:

You need records. If the net worth assessment covers 2021 through 2024 and the CRA sends the assessment in 2026, you need bank statements, wire transfer confirmations, loan documents, gift letters, and receipts going back five or six years. If you do not have them, the CRA’s numbers stand.

Cash explanations are weak. “I had $80,000 in cash savings under my mattress from before 2021” is exactly the type of explanation the CRA hears from every taxpayer who is assessed, and it is almost impossible to prove. If the cash came from a bank withdrawal, the bank records prove it. If it was cash saved over many years from small amounts, there is no documentation, and the explanation fails.

Foreign sources require documentation. Gifts or loans from family abroad require proof from both sides: the source of the money in the sender’s hands, the wire transfer or deposit records, and ideally a signed gift letter or loan agreement. For taxpayers from countries where banking systems are less developed or record-keeping is informal, producing this evidence can be difficult.

The practical lesson: if you operate a cash business or have significant assets funded by non-income sources (family money, savings from a prior career, funds from abroad), keep the documentation. A contemporaneous record (created at the time of the transaction) is far more persuasive than a reconstruction created after the CRA sends the assessment.

How does the gross negligence penalty apply?

If the CRA concludes that the unreported income was omitted “knowingly or under circumstances amounting to gross negligence,” it can apply the penalty under ITA 163(2): 50% of the tax on the unreported amount. On a $100,000 unreported income finding at a 40% marginal rate, the tax is $40,000 and the gross negligence penalty is $20,000, on top of interest.

The CRA routinely applies gross negligence penalties on net worth assessments, especially when the unreported amount is large relative to reported income. The CRA’s reasoning: a discrepancy this large could not have happened by accident.

The burden of proof for the gross negligence penalty is on the CRA, not the taxpayer (ITA 163(3)). The CRA must prove, on a balance of probabilities, that the taxpayer knew they were omitting income or was reckless in preparing the return. A taxpayer who kept poor records but reported income in good faith has a defense against the penalty even if the net worth assessment itself is upheld.

How do I challenge a net worth reassessment?

Step 1: Get the CRA’s schedule. The auditor’s net worth schedule is the entire case. Request the full working papers, not just the reassessment notice. You need to see every line: what assets the CRA included, what values it assigned, what liabilities it counted, and what personal expenditures it estimated.

Step 2: Rebuild the schedule yourself. Go through every line and verify it. Common errors to check: Are the asset values accurate? Did the CRA count a financed purchase without the corresponding liability? Are the personal expenditure estimates reasonable for your actual lifestyle? Did the CRA account for all non-taxable sources? Is the opening net worth correct?

Step 3: Document the non-taxable sources. If the increase in net worth came from a gift, a loan, inherited money, or pre-existing savings, gather every document that supports it: bank statements, wire transfer receipts, loan agreements, gift letters, estate documents. If the money came from abroad, get documentation from the foreign bank or the sender.

Step 4: Challenge the expenditure estimates. If the CRA used Statistics Canada averages, prepare your actual expenditure breakdown from bank and credit card statements. If your actual spending was lower than the estimates, the discrepancy shrinks.

Step 5: File a notice of objection. You have 90 days from the date of the reassessment (or one year from the filing due date, whichever is later) to file the objection. Include a detailed submission addressing each error in the CRA’s schedule.

Step 6: If the objection fails, consider Tax Court. Net worth assessments are among the most commonly litigated issues in Tax Court. The court will review the CRA’s schedule, your evidence, and determine the correct amount. In many cases, the court reduces the CRA’s assessment significantly (sometimes to zero) because the CRA’s assumptions were wrong.

What should I do next?

If you have received a net worth reassessment: get the CRA’s full working papers, rebuild the schedule, and identify every error. If you are a cash-business owner or have significant non-income sources of wealth: keep the documentation now, before an audit begins. If the CRA has applied gross negligence penalties on top of the net worth assessment, the penalty itself may be challengeable even if the underlying assessment is partially upheld.

This guide is general information, not tax advice for your specific situation. Which points apply, and how, depends on your facts.