Working With Your Spouse — Canadian Income Splitting

Splitting income with a spouse can save thousands a year — but TOSI and the attribution rules mean it only works if there's real labour, real capital, or carefully structured loans. Six options below, ranked by audit-defensibility.

Last reviewed: May 25, 2026

Guidance, not advice. We explain the rules, we don't assess your situation. Always seek financial or tax advice from your accountant, or contact CRA. Read our editorial scope →

Legal constraints

TOSI (s.120.4): "split income" taxed at top marginal rate (~53%+ depending on province) unless an exclusion is met.
Attribution (s.74.1–s.74.5): income from property transferred or loaned between spouses is attributed back to the transferor unless the prescribed-rate loan exception is met.
Both rules together: a fictitious salary or a paper-only partnership won't survive audit. You need substance.

Option 1 — Partnership

Both spouses genuinely run the business, and the income allocation matches each partner's real contribution. Requires a written partnership agreement, joint registration with CRA, and acknowledges unlimited personal liability for both partners.

Best when both spouses contribute roughly equal labour and capital. Weakest defence if one spouse can't articulate operational decisions to an auditor.

Option 2 — Employ your spouse (safest)

Pay the spouse a market-rate salary for genuine work — admin, bookkeeping, scheduling, marketing. This is not subject to TOSI (wages are excluded). Builds their RRSP room, CPP credits, and EI eligibility (with caveats).

Fully deductible to the business. The salary must be reasonable for the work done, paid on a regular schedule, and supported by payroll source deductions remitted to CRA.

Worked example

$120,000 sole-proprietor business in Ontario, single earner pays ~$38k tax. Employ spouse at $30,000 (5–10 hrs/week genuine admin work):

Owner taxed on:  $90,000  (~$22k tax)
  Spouse taxed on: $30,000  (~$3k tax)
  Combined tax:    ~$25k
  Savings vs single earner: ~$13k/yr*
  (*before CPP both sides — typical net ~$8k–$10k)

Option 3 — CCPC with spouse shares (TOSI-constrained)

If your spouse holds shares in your CCPC, dividends paid to them are split income and taxed at the top marginal rate unless one of these exclusions applies:

Excluded business: spouse is actively engaged 20+ hours/week on a regular, continuous basis
Excluded shares: spouse owns ≥10% (votes & FMV), is 25+ years old, and the corporation is non-service and non-professional
Owner is 65+ (spousal pension splitting equivalent)

If neither test is met, every dividend goes to TOSI top rate. This is the single biggest trap in modern Canadian tax planning. See the TOSI guide.

Option 4 — Prescribed-rate loan (investment income)

To shift investment income to a lower-bracket spouse, the higher-earner lends them capital at the CRA prescribed rate (4% in Q1 2025, locked in for the life of the loan if signed at that quarter's rate).

The spouse invests the loan proceeds. Income above the prescribed rate stays with the spouse and is taxed in their bracket. Interest must be paid annually by January 30 of the following year — miss it once and attribution reapplies forever.

Worked example

Loan amount:           $200,000
  Prescribed rate:       4%      → spouse pays  $8,000 interest
  Portfolio return:      7%      → spouse earns $14,000
  Net to lower bracket:  $6,000  shifted from 50% to 25% MTR
  Annual saving:         ~$1,500

Option 5 — Spousal RRSP

Higher earner contributes using their own RRSP room; the deduction is theirs but the funds belong to the spouse. Withdrawals after three calendar years past the last contribution are taxed in the spouse's hands (the "three-year attribution" rule).

Unaffected by TOSI. Particularly useful for smoothing retirement income between spouses who will retire at different brackets.

Option 6 — CPP / pension splitting (retirement)

CPP credit splitting: apply to CRA — both spouses' contributory periods are shared, often increasing the lower-earner's CPP.
Pension income splitting: up to 50% of eligible pension income (RRIF after 65, registered pension after any age) can be elected to the spouse on Schedule 7.
Neither is subject to TOSI.

Decision matrix

Situation	Best tactic	Why
Spouse does 5–10 hrs/wk admin	Employment salary	Auditable, TOSI-safe
Spouse co-runs 20+ hrs/wk	Partnership or CCPC excluded business	Defensible income split
Non-service CCPC, spouse owns ≥10%	Excluded shares	Dividend exemption from TOSI
Large investment portfolio + income gap	Prescribed-rate loan	Shifts investment income legally
Retirement income smoothing	Spousal RRSP + pension split	Long-term bracket balancing

What to avoid

Paying dividends to a non-working spouse in a service CCPC — TOSI top rate
Paper-only partnership with no real spouse contribution — auditor will reallocate
Fictitious salary not actually paid via payroll — CRA disallows on first lookup
Forgetting the January 30 interest payment on a prescribed-rate loan — attribution re-attaches permanently

Related calculators and guides

Last reviewed: May 25, 2026