Calculators

Work out the number yourself.

Five calculators, each built on the published instrument rather than a rule of thumb. Every one of them shows its working and cites the statute, regulation or table it comes from, so you can check the answer instead of trusting it.

Family law01

Child support calculator

How much child support does the paying parent owe each month?

Enter the paying parent's gross income and how many children there are, and it returns the monthly amount from the Federal Child Support Tables for Ontario, along with the income band and the arithmetic behind it. Add the other parent's income and it will also work out a shared-parenting set-off and split the add-on expenses in proportion to what each parent earns.

For example: Two children and an income of $90,000 gives $1,372 a month.
Built on: SOR/97-175, Schedule I (Ontario), in force October 1, 2025
What it will not tell you: How income gets determined in the first place, which decides more cases than the table does.

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Civil litigation02

Court interest calculator

What is the interest worth on money I am owed, or on a judgment?

Interest under sections 127 to 129 of the Courts of Justice Act, at the quarterly rates the Ministry of the Attorney General publishes. It handles both halves: the interest that accrues between the day you lost the money and the day of the order, and the interest a judgment earns while it goes unpaid. The rate is fixed by the quarter the claim was issued, not by today.

For example: $40,000 over 837 days at 5.3% comes to $4,861.48.
Built on: Courts of Justice Act ss. 127 to 129, on the published rate tables
What it will not tell you: Section 130, which lets a court disallow interest or change the rate or the period.

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Corporate law03

Corporate filing deadlines

What does my corporation owe the government this year, and when?

Give it a fiscal year end and it lays out the year as a timeline: the T2 return, the tax balance, instalments, GST/HST, the annual return, and the annual resolutions. Weekend and holiday shifts are applied, each date names the section it comes from, and the balance date that depends on the small business deduction is marked as conditional rather than quietly decided for you.

For example: A March 31 year end puts the T2 on September 30, the same date CRA publishes.
Built on: Income Tax Act, Excise Tax Act, Corporations Information Act, OBCA
What it will not tell you: Payroll source deductions and T4s, which run on a schedule of their own.

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Civil litigation04

Power of sale timeline

I have missed mortgage payments. How long do I have, and what do I owe?

Enter the first payment you missed and your regular payment. It adds up the arrears, then lays out the minimum timeline in Part III of the Mortgages Act: the fifteen days of default before a Notice of Sale can be given, the thirty-five days after notice before a sale, and the twenty days to defend if the lender sues for possession. Tell it what the lender has already sent and the dates run from the real notice instead of the earliest possible one.

For example: Four missed payments of $2,850 is $11,400 in arrears, with a notice possible on day 15.
Built on: Mortgages Act, R.S.O. 1990, c. M.40, Part III; Rules of Civil Procedure rr. 3.01, 18.01
What it will not tell you: The lender's legal costs, which you must also pay to reinstate, and what the house will sell for.

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Civil litigation05

Mortgage renewal calculator

My term is up and the rate has changed. What does the payment become?

Balance, amortization left, the rate you have and the rate you have been offered. It returns the payment before and after, the difference per month and per year, and the new payment as a share of gross income. The arithmetic uses the half-yearly compounding section 6 of the Interest Act requires a fixed-rate mortgage to state, so the figure matches the bank's rather than a spreadsheet's.

For example: A $500,000 balance moving from 2.49% to 5.49% over 20 years adds $775.24 a month.
Built on: Interest Act (Canada) s. 6; CMHC gross debt service limit
What it will not tell you: Prepayment penalties, renewal fees, and whether a lender will renew you at all.

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A number is a starting point, not an answer. If what you actually need is to know whether the number holds up in your situation, book a consultation and we will tell you where it moves.

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Caleesis Telesh
Founder & Principal Lawyer
Shaneisha Mattis
Foreign Trained Lawyer
Diego Herrera
Internationally Trained Lawyer
Daniel Osei
Student Legal Assistant

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More about the firm

Hours: Telesh Law Firm Professional Corporation is open Monday – Friday 9:00 AM – 6:00 PM. Saturday by appointment. Sunday closed. Consultations are booked in advance; walk-ins are not seen without an appointment.
Offices: Telesh Law Firm has two offices: the Scarborough office at 1585 Markham Road, Scarborough, ON M1B 2W1, and the Mississauga office at 2960 Drew Road, Unit 139, Mississauga, ON L4T 0A5. Call 416-639-0887 or 416-299-8088, or email tlf@teleshlawfirm.ca.
Consultation and rates: Telesh Law Firm offers a paid one-hour consultation: a full review of your matter with a lawyer, so you leave knowing where you stand and what your options are. Rates for the work that follows are set out in plain language before any work begins.
Response time: A member of the team responds to consultation requests within one business day. For an urgent matter, call rather than write.
Languages: Counsel is available in eight languages: English, Hindi, Urdu, Farsi (Persian), Punjabi, Spanish, and Tamil.
Courts: Telesh Law Firm appears in the Ontario Court of Justice, the Superior Court of Justice, and Small Claims Court in Toronto and across the Greater Toronto Area.
Licensing: Telesh Law Firm Professional Corporation is a member of the Law Society of Ontario. Caleesis Telesh, Founder & Principal Lawyer, is an Ontario licensed lawyer. The firm is also a member of the Canadian Bar Association, Criminal Lawyers' Association, Canadian Immigration Lawyers Association, and Durham Region Law Association.
Clients from: Clients come to Telesh Law Firm from the Greater Toronto Area, including Scarborough, Mississauga, Toronto, Brampton, Milton, Newmarket, Oshawa, Barrie, Guelph, Hamilton, and Bracebridge.

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