If you and your spouse both work from home or run a business together, you may be able to reduce your combined household tax burden through strategic income splitting on home office expenses. In Canada, couples can't directly "split" home office deductions the way they split spousal income, but there are legal structures that allow you to allocate business income and expenses between spouses in ways that lower overall tax. This approach works best when spouses have different marginal tax rates, and it requires careful documentation and CRA compliance. When two spouses earn income from home-based work, they typically file separate tax returns and claim separate home office deductions. However, the tax benefit of those deductions depends on each person's marginal tax rate. If one spouse earns significantly more than the other, their deductions save more tax dollars per dollar claimed. Through legal income-splitting structures, couples can reallocate that tax savings more fairly and reduce total household tax. Example: Sarah earns $80,000 as a self-employed consultant and claims $6,000 in home office expenses. Her marginal tax rate is 43.4% (Ontario example for 2026). Tom earns $35,000 part-time and would normally claim $2,000 in home office expenses at a 29.
No, not directly. Each spouse must claim expenses they incur or are allocated to them in writing through a partnership or corporate structure. The CRA won't allow you to simply divide home office costs between two tax returns without a legal business arrangement backing it.
A written spousal partnership is often simplest. Both spouses agree in writing to own and operate the business together, allocate expenses according to space or effort, and report their share of income and expenses. This avoids incorporation costs while allowing flexibility in how you split deductions.
Yes, you report the salary as employment income (or self-employment income if you're not a formal employee). Your spouse deducts it as a business expense. The CRA requires this to be fair market value for actual work performed, not a gift disguised as payment.
Not automatically, but spousal income arrangements are on the CRA's radar. If your documentation is solid, your arrangement is defensible, and both spouses materially contribute to the business, you should be fine. Weak documentation or arrangements that look artificial are red flags.
Owning the home jointly doesn't automatically entitle you to split expenses. You need a business agreement explaining how home office costs are shared between spouses. Home ownership structure and business expense allocation are separate legal issues.