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Business Income Taxes
The corporate return is a report on decisions already made. Almost every dollar that could have been saved was decided months earlier.
What this covers
Business income tax work covers the corporate return and the decisions that determine what goes on it: protecting the small business deduction, choosing between salary and dividends, managing passive investment income inside the corporation, and getting cash out to shareholders at the lowest total cost. Compliance is the deadline; planning is where the money is.
Who this is for
- Canadian-controlled private corporations with active business income
- Owner-managers deciding how to pay themselves each year
- Companies accumulating investment income alongside an operating business
- Groups of associated or related corporations sharing one small business limit
What you end up with
The point of the exercise
The small business rate protected
Passive income and associated corporation limits monitored so the low rate is not lost by accident.
A defensible remuneration plan
A salary and dividend mix calculated for the year, with the split income analysis documented.
Deadlines met without a scramble
Returns, slips, elections, and instalments on a schedule you can see.
Business Income Taxes in detail
The small business deduction, and the two ways it erodes
A Canadian-controlled private corporation can claim the small business deduction on up to $500,000 of active business income each year, taxed at a combined federal and British Columbia rate substantially below the general corporate rate. It is the single largest recurring tax advantage available to a private company, and two separate rules quietly take it away.
The first is size. The business limit is reduced as taxable capital employed in Canada rises above $10 million, and is eliminated at $50 million. The second is passive income. Where adjusted aggregate investment income across the associated group exceeds $50,000 in a year, the business limit is reduced, and it is gone entirely at $150,000. A company with a healthy investment portfolio can find its operating profit taxed at the general rate without anything about the operating business having changed.
Associated corporations share one $500,000 limit and must file an allocation agreement. Control, cross-ownership, and family relationships all feed the association rules, and a structure assembled without them in mind often turns out to be sharing a limit nobody intended to share.
Salary, dividends, or both
Canada's integration principle means the theoretical difference between paying yourself salary and paying yourself a dividend is small. The practical difference is not, because the decision drives several things at once.
Salary creates RRSP contribution room and CPP pensionable earnings, is deductible to the corporation, and requires source deductions. Dividends create neither RRSP room nor CPP, are paid from after-tax corporate income, and may be eligible or non-eligible depending on the pool they come from. There is also a floor: paying enough salary to generate maximum RRSP room is usually worth doing before dividends are considered.
Layered on top are the split income rules, which can push dividends paid to a spouse or adult child to the top marginal rate unless a specific exclusion applies, and the requirement that any salary be reasonable for work actually performed. The right mix is specific to the year, the corporate income level, and the household — it is a calculation, not a policy.
The accounts that decide how cash comes out
Three notional accounts determine the cost of distributions. The general rate income pool tracks income taxed at the general corporate rate and supports eligible dividends, which carry a lower personal tax rate. Refundable dividend tax on hand — split into eligible and non-eligible pools — is corporate tax on investment income that is refunded when taxable dividends are paid, so paying the wrong type of dividend can leave a refund stranded. The capital dividend account holds the non-taxable half of capital gains and certain life insurance proceeds, and pays out entirely tax-free.
A capital dividend paid in excess of the account balance attracts a punitive penalty tax, so the balance has to be confirmed and an election filed before the dividend is declared. These accounts are why the same amount of cash leaving the same company can cost meaningfully different amounts of tax depending only on which order things are done in.
Shareholder loans and the twelve-month trap
Money taken out of the corporation as a loan rather than salary or a dividend is caught by subsection 15(2). Broadly, if the loan is not repaid by the end of the corporation's taxation year following the one in which it was made, the full amount is included in the shareholder's income — and repaying it afterwards does not undo the inclusion, only generate a later deduction. A series of loans and repayments does not reset the clock.
This is one of the most common and most avoidable assessments we see. Tracking the shareholder account through the year, and deciding deliberately whether a withdrawal is a loan, a salary, or a dividend, prevents it entirely.
Compliance done properly
The corporate return, the T4 and T5 slips, the GST/HST and BC PST filings, and the instalment schedule are the floor. Where they matter is in consistency: a shareholder loan account that agrees with the return, capital dividend elections filed on time, and asset additions classified correctly for capital cost allowance.
Rates, thresholds, and rules change from year to year. The figures on this page describe how the rules work in general terms and are not a substitute for advice on your own filings.
Diarise these
The deadlines that cost money
| Filing or payment | Due |
|---|---|
| T2 corporate returnFiling deadline, regardless of when the balance is due. | Six months after fiscal year-end |
| Corporate balance owingThree months for a CCPC claiming the small business deduction and meeting the conditions. | Two months after year-end |
| T4 and T5 slipsFor the preceding calendar year. | Last day of February |
| Capital dividend electionConfirm the account balance first — an excess dividend attracts penalty tax. | On or before the dividend becomes payable |
| T3 trust returnWhere a family trust sits in the structure. | 90 days after the trust's year-end |
Deadlines shift when a due date falls on a weekend or holiday, and the rules change with each budget. Confirm your own dates before relying on them.
How it runs
What working together looks like
Review the current year before it closes
Projected income, the shareholder loan account, and the small business limit are looked at while there is still time to act on them.
Set the remuneration mix
A salary and dividend calculation for the year, tested against RRSP room, CPP, the split income rules, and the corporation's dividend pools.
Check the limit and the pools
Associated corporation allocations, adjusted aggregate investment income, and the balances in the general rate income pool, refundable pools, and capital dividend account.
File, and file consistently
Return, slips, elections, and instalments prepared so the numbers agree with each other and with the corporate records.
Report back in plain terms
A short year-end summary of what was decided, what it saved, and what should be looked at before the next year-end.
Questions
Business Income Taxes, answered
General information about how the rules work, current at the time of writing — not advice about your situation. Speak to Ray Loucks before acting on any of it.
When is my corporate tax return due?
Six months after the end of the corporation's fiscal year. The balance of tax is due earlier — two months after year-end for most corporations, or three months for a Canadian-controlled private corporation that claims the small business deduction and meets the associated conditions. Because the payment deadline arrives before the filing deadline, the tax has to be estimated and paid before the return is finished.
What is the small business deduction worth?
It reduces the corporate tax rate on up to $500,000 of active business income each year. In British Columbia the combined small business rate is well below the combined general rate, so the annual saving on a fully used limit is substantial — which is why the erosion rules matter so much. Both the taxable capital test and the passive income test can reduce or eliminate the limit without any change in the operating business.
Should I pay myself salary or dividends?
Usually some of both, and the split changes year to year. Salary generates RRSP contribution room and CPP pensionable earnings and is deductible to the corporation; dividends do neither but avoid payroll deductions and can be paid from the more favourable dividend pools. Because Canada's system is designed for rough integration, the raw tax difference is small — the decision is really about RRSP room, CPP, cash flow timing, the split income rules, and which corporate pools are available.
Does investment income inside my corporation cost me the small business rate?
It can. Where adjusted aggregate investment income across the associated group exceeds $50,000 in a year, the $500,000 business limit is reduced; at $150,000 it is eliminated. That is often the trigger for moving the investment portfolio into a separate holding company, though the restructuring has to be done with the association rules and subsection 55(2) in mind rather than as a simple transfer.
I took money out of my company during the year. Is that a problem?
It depends on how it is characterised and when it is repaid. Under subsection 15(2), a shareholder loan that is still outstanding at the end of the corporation's next taxation year is included in the shareholder's income in the year it was made — and later repayment does not reverse that inclusion. Deciding while the year is open whether the withdrawal should be salary, a dividend, or a repayable loan, and documenting it, avoids the issue.
Often needed together