Start with a range, not one perfect sale price
Before the home reaches the market, the sale price is an estimate. Build a conservative, expected and stronger-outcome scenario. That makes your moving plan less dependent on one optimistic number and shows how sensitive your proceeds are to price and costs.
Separate the mortgage payout from selling expenses
Your mortgage balance is not a commission or closing fee. It is money already borrowed against the property that normally must be repaid on closing. Ask the lender for a current payout statement and whether a prepayment charge, discharge charge or other amount may apply. The balance visible in online banking may not be the exact closing payout.
Calculate commission and HST clearly
Commission should be separated into the listing side and any cooperating-brokerage amount rather than discussed only as one combined percentage. HST is then applied to the commission. Fourcities uses a 1% listing fee. The calculator compares that with a 3% listing-side example while leaving the buyer-agent assumption unchanged, so the difference comes from the listing side.
3% listing side + HST$27,120
1% listing side + HST$9,040
Potential difference$18,080
Add the costs that depend on your particular move
Legal fees and disbursements, mortgage charges, repairs, cleaning, staging, storage and moving are not identical for every seller. Some homes benefit from preparation; others need very little. Treat each proposed expense as an investment decision: what buyer objection does it remove, and is the likely return worth the cost?
Remember closing adjustments
Property taxes, condominium fees, utilities, rental items and negotiated credits may be adjusted on closing. Some adjustments increase what you receive and others reduce it. Do not treat a planning calculator as a substitute for the final statement prepared by your lawyer.
Use the net number to make the next decision
Once you have an estimated range, test the decisions that matter: the down payment on the next home, debt repayment, investment capital, moving costs and the cash buffer you want after closing. A lower selling cost improves the result only when the marketing and sale strategy still protect the outcome.
Free interactive calculatorCalculate what you may keep →Frequently asked questions
Is the mortgage balance a selling cost?
No. It is debt being repaid from the sale proceeds, not a fee charged for selling. It still reduces the amount you receive, which is why a useful net sheet shows it separately.
Is HST charged on real estate commission in Ontario?
HST generally applies to real estate commission. This guide and the Fourcities calculator use 13% HST on the commission examples.
Does the seller always pay the buyer agent?
The amount and structure depend on the listing agreement and transaction. The calculator keeps the buyer-agent percentage adjustable and identical in both listing-side comparisons.
Why can the final lawyer statement be different?
Mortgage payout figures, tax and utility adjustments, legal disbursements, negotiated credits and other transaction details may change before closing. The lawyer’s statement of adjustments is the final source for closing figures.
How can I improve the estimate?
Use a realistic sale-price range, request an up-to-date mortgage payout statement, obtain a legal-fee estimate and budget only for preparation work that supports the sale strategy.
Continue your research
FourCities Seller Cost Report →Complete Ontario selling-cost checklist →How commission works in Waterloo Region →General planning information only. It is not a valuation, quote, mortgage payout statement, tax or legal advice. Actual amounts and services vary. Commissions are negotiable and not set by law.