Bhai Dooj & Buying Property With a Sibling: Title, the Mortgage, and the Agreement

What Bhai Dooj marks

Bhai Dooj generally falls two days after Diwali, so it lands in October or November. The date follows the lunar calendar and moves every year, so confirm it rather than assuming it.

It is a day about the bond between a brother and a sister. In many families the sister marks her brother’s forehead, sweets and gifts are exchanged, and the day is understood as a mutual promise to look out for one another. Names and customs differ widely — Bhai Beej, Bhau Beej, Bhai Phonta — and families keep it their own way.

Notice the shape of the promise: protection and obligation, held by two people, running both ways. Written down, that is close to what a co-ownership agreement is for. And siblings do end up owning together — two incomes qualify for more than one, or a parent dies and a house passes to children who never planned it.

Title and the mortgage are two separate questions

In Robin’s experience the confusion usually starts here. Title is ownership — the register that says who owns the property and in what form. The mortgage is debt — the loan secured against it. Different documents, which can name different people; being on one does not put you on the other. A person can be on the mortgage and not on title, owing money and owning nothing, or on title and not on the mortgage, owning a share of a property someone else has to pay for.

Where two people do borrow together, they are generally each liable for the whole mortgage rather than for a share of it, whatever they agreed between themselves. A lender’s rule then sits on top of the legal one: lenders generally will not advance a mortgage where someone on title is not party to it, so in practice going on title means going on the mortgage too. That is the lender’s requirement, not a rule of ownership, and it varies between lenders — ask your mortgage professional before deciding who goes on what.

Joint tenancy or tenants in common — what each does on a death

Ontario has two ordinary ways to hold title together, and the difference only shows itself at the worst possible moment. In a joint tenancy the owners hold one undivided interest between them, carrying a right of survivorship: when one dies, their interest passes automatically to the surviving owner or owners, and the will does not control it. As tenants in common each owner holds a distinct share, the shares need not be equal, and a deceased owner’s share forms part of their estate and goes where their will, or Ontario’s rules of intestacy, send it.

Now put a sibling in each. Two brothers own a house in joint tenancy; one dies, and his share goes to his brother rather than to his wife and children, whatever his will says. Hold the same house as tenants in common and that share goes to the wife and children, who now co-own with their uncle and may want their money out.

Neither is wrong — either can be exactly what a family wants. What is wrong is finding out which one you chose after the funeral. A joint tenancy can also be severed, which converts it into a tenancy in common. Which form your title takes is set out in the transfer your lawyer registers, so ask your real estate lawyer to state it expressly, to confirm how it works in your situation, and to tell you what it does when someone dies.

Co-signing for a sibling: what you are agreeing to

The other half of this is the sibling who is buying nothing but is asked to help someone who is. A co-signer is generally brought onto the mortgage as a borrower in their own right, alongside the buyer and liable from the first day for the mortgage rather than for a share of it, and is commonly placed on title too. A guarantor generally guarantees the obligation without being an owner, is typically not on title, and is looked to when the borrower does not pay — though the amount guaranteed can still be the whole of the debt.

In both, three things are true that families do not expect. The obligation lasts as long as the mortgage does, not as long as the favour was meant to. Lenders generally count it against the helping sibling’s own borrowing capacity, which can affect their ability to buy a home themselves. And there is no simple exit: coming off a mortgage ordinarily means the remaining borrower refinancing and qualifying alone. Lenders differ and the words are used loosely, so ask your mortgage professional which one is being signed, and ask your lawyer to confirm what the document itself says before anyone signs it.

Write the family agreement before the offer, not after

In Robin’s experience these arrangements usually work. What causes damage is almost never the buying — it is the part nobody wrote down. Whose money went in. What happens if one wants out in four years. What happens if one of them dies.

So write it while nobody has found a house yet. Once an offer is live there is a deposit due, a lawyer working to a closing date, and pressure not to be the one raising hard questions. It is not a document about distrust; it protects the relationship from a disagreement neither sibling can currently imagine — which is what a promise of protection is for. Start with the deposit: a large sum, due shortly after the offer is accepted, and it is easy for it to come from whichever sibling’s account the money happened to be in. The agreement itself is a lawyer’s document — have your real estate lawyer draw it or review it rather than working from a template.

• What each contributed, where the deposit came from, and whether the shares are equal or unequal.
• Who pays the mortgage, property tax, insurance, condo fees and repairs, in what proportions, and what happens if one cannot fund their part of a large repair.
• Who lives there, whether they pay anything for it, and what happens if the other wants to move in later.
• What happens if one wants out — first right to buy the share, how the price is set, how long they have to finance it, and how a stalemate gets resolved without a court.
• What happens on a death, and whether that matches the form of title actually registered.
• What happens if a sibling marries, separates or divorces, since a spouse’s claims can reach into what a co-owner holds.

Robin is not a lawyer, and this arrangement needs one

Robin is a REALTOR®. He can explain these choices, raise them early enough to matter, and coordinate the people who decide them. He does not give legal, tax or mortgage advice, and a co-ownership arrangement is squarely legal advice. Ask about independent legal advice too: a lawyer acting for two purchasers at once may not be able to advise each separately if their interests pull apart — and the agreement exists for that moment.

There is a tax layer as well. Ontario’s land transfer tax refund for first-time buyers is assessed against each purchaser, so a purchase where one sibling has owned before is not treated the same as one by two first-time buyers. A property in the City of Toronto carries a municipal land transfer tax on top of the provincial one. And a share of a home a sibling does not live in may not be treated on a sale the way a home they lived in would be. The Ontario Ministry of Finance publishes the current provincial land transfer tax rules and refund conditions and the City of Toronto publishes its own, but how they apply to two siblings on one title belongs to a lawyer and an accountant, and is cheaper asked before closing than after.

When siblings inherit a property together

The other version of this is the one nobody chose. A mortgage registered against the property does not disappear because the owner did — the debt stays with it, and continuing it in the children’s names is a new lending decision, not an automatic one. The estate trustee has to finish their work before title moves, and once it does the siblings are co-owners with every question above, having planned for none of it.

The decision comes down to three: sell, have one sibling buy the others out, or keep it and rent it. A buyout is a purchase like any other: it needs a value everyone accepts and financing that actually gets approved, so the buying sibling should be pre-approved before anyone shakes hands on a number. Where siblings cannot agree at all, Ontario law lets a co-owner ask a court to divide the property or force its sale — slow, public, expensive, and often the end of the relationship as well as the co-ownership. A backstop, not a plan.

None of this is a REALTOR®’s to answer. Take the estate itself to an estates lawyer, who confirms what the estate trustee can and cannot do, when title is able to move, what the registered mortgage means for the beneficiaries, and how a co-owner’s right to ask a court to divide or sell a property would apply to your family. Ask a mortgage professional whether the existing mortgage can continue in the children’s names, or whether a new one has to be arranged.

What Robin tells brothers and sisters buying together

The families who do this well are not the ones with the most money. They are the ones who had the awkward conversation while everyone was calm, wrote down what they agreed, and paid a lawyer to make the paperwork match it.

So the practical order is this. Talk first, get legal and mortgage advice second, write the agreement third, and go house-hunting fourth. It feels backwards, but it is the only order in which the difficult questions get answered by people rather than by a default nobody read. Bhai Dooj is a promise to look after each other; a page of writing signed while everyone is on good terms is a literal way to keep it.