What Is Line 13500 on a Canadian Tax Return? A Guide for Self-Employed Filers

If you’ve recently started freelancing, launched a small business, or picked up some side income, tax season can feel overwhelming fast. One of the first questions that tends to come up is: what is line 13500 on a tax return in Canada, and do I actually need to fill it in?

The short answer is yes, if you’re self-employed. Line 13500 is where sole proprietors and self-employed Canadians report their net business income on the T1 General Tax Return. It covers everything from freelance work and professional practices to trades and other for-profit ventures.

In this guide, we’ll walk you through everything you need to know as a beginner filer. You’ll learn exactly where line 13500 appears on your return, how it differs from line 13499, which expenses you can deduct, and what common mistakes to avoid. We’ll also cover some important topics like GST/HST registration, tax installments, and when it makes sense to get professional help.

By the end, you’ll have a clear, confident understanding of how to report your self-employment income accurately and without the stress.

What Line 13500 Means and Where It Appears on Your T1

Line 13500 at a glance: Line 13500 is the field on your T1 General where self-employed Canadians report their net business income, calculated by subtracting eligible expenses from total gross business revenue.

Line 13500 sits in the Total Income section on page 2 of the T1 General, where the CRA consolidates every income source earned during the year.

The CRA defines business income as money earned from a profession, trade, manufacture, or undertaking of any kind, including any activity you carry on for profit with demonstrated commercial intent. Casual activities without a genuine profit motive don’t qualify.

Line 13500 replaced the former line 135 when the CRA restructured the T1 by appending zeros to existing line numbers across the entire form.

The critical point before filling this in: line 13500 captures net income, not gross revenue. Reporting the wrong figure inflates your taxable income and increases what you owe. If you’re navigating this as part of a broader self-employed filing, the 2025 guide to filing your income tax return in Canada walks through every step in plain language.

Who Needs to Report Income on Line 13500?

Beyond sole proprietors already introduced, line 13500 also applies to freelancers, independent contractors, tradespeople, consultants, graphic designers, and real estate agents.

The clearest sign you are not on line 13500: you received a T4 slip. T4 income belongs on line 10100 as employment income. The two lines are mutually exclusive for the same income stream.

The CRA also draws a firm line between genuine self-employment and hobby income. To qualify for line 13500, your activity must show commercial intent and a reasonable expectation of profit. Selling handmade crafts occasionally to friends does not meet that bar. Running an Etsy shop with consistent sales, a business bank account, and pricing set to generate profit likely does.

Gig economy workers, including rideshare drivers, food delivery couriers, and online marketplace sellers, increasingly fall under self-employment classification and must report through line 13500.

If you left a salaried job mid-year to go freelance, you may report on both line 10100 and line 13500 in the same filing year. For a full walkthrough of how to report self-employment income and file your return, that guide covers the process step by step.

Line 13499 vs. Line 13500: Gross vs. Net Income Explained

Line 13499 is your gross business income, meaning every dollar you earned before subtracting a single expense. Line 13500 is your net business income, what remains after eligible deductions are subtracted. Think of it this way: if you invoiced clients $80,000 and spent $25,000 running your business, line 13499 shows $80,000 and line 13500 shows $55,000.

Both lines are mandatory. You cannot leave 13499 blank just because your net income is low or zero after deductions; the CRA uses both figures when assessing your return.

That gap between the two numbers matters. A large difference tells the CRA you are claiming significant deductions, and if supporting receipts and records are missing, that gap can attract closer review.

One of the most common self-employment filing errors is entering gross revenue on line 13500 instead of net income. That mistake inflates your taxable income, meaning you overpay tax or receive a notice of reassessment.

Both figures flow from the T2125 Statement of Business or Professional Activities form. You complete the T2125 first, reconciling revenue against expenses, and those totals feed directly into the corresponding lines on your T1.

Which Business Expenses Can You Deduct to Arrive at Line 13500?

So what exactly gets subtracted to bring your gross income down to that line 13500 figure? Here are the main categories the CRA allows:

• Home office: Deduct the percentage of your home’s square footage used exclusively for business. If your office takes up 15% of your home, you can claim 15% of rent, utilities, and maintenance.
• Vehicle costs: Business-use kilometres are deductible. Learn what vehicle expenses the CRA allows you to deduct before estimating this one.
• Other common deductions: Professional dues, software subscriptions, advertising costs, and business-use tools or equipment all qualify.

Meals and entertainment are only 50% deductible, and only when directly tied to earning income. Keep receipts that note the business purpose and who attended.

Capital expenditures (a laptop, specialized equipment) are typically not fully deductible in the year of purchase; CRA rules generally require gradual depreciation, consult the T2125 instructions for the applicable Capital Cost Allowance (CCA) schedule.

Mixed-use expenses such as a phone you use for both personal and business calls must be prorated. Apply a consistent, reasonable business-use percentage and document your methodology.

For all of the above, the CRA expects receipts, invoices, bank statements, and a mileage log. Digital records are perfectly acceptable as long as they are legible and retrievable if the CRA ever asks.

Common Mistakes Self-Employed Filers Make on Line 13500

Knowing which deductions are eligible only helps if you actually claim them correctly. These are the errors that most commonly trip up self-employed filers.

Reporting gross revenue on line 13500 instead of net income (covered above) remains the single most costly filing error.

Missing deductions due to poor tracking. Vehicle mileage, home office costs, and professional development fees are routinely under-claimed simply because filers did not track them during the year. If you rely on memory at tax time, you will leave money behind. Tax software like Wealthsimple Tax can also miss these nuances, which is worth understanding before you file; a CPA’s honest breakdown of what it covers and where it falls short explains the gaps clearly.

Misclassifying hobby income as business income. The CRA looks for consistent profit-seeking behaviour and business-like operations. Reporting revenue from an activity without commercial intent can trigger an inquiry.

Omitting cash or barter income. The CRA cross-references bank records, GST filings, and payment processor data. Gaps between those sources and your reported line 13499 figure attract attention.

Incomplete prior-year records. Missing bookkeeping from earlier years makes it impossible to reconstruct accurate figures for both lines, and unexplained discrepancies increase audit risk significantly.

GST/HST Registration and Partnership Reporting Considerations

Two more filing considerations affect how accurately line 13500 reflects your real income: GST/HST status and business structure.

GST/HST registration threshold. Once your gross self-employment revenue exceeds $30,000 (verify the current threshold with the CRA or the Excise Tax Act) in a single calendar quarter, or cumulatively over four consecutive quarters, CRA registration is legally required. Sole proprietors approaching that threshold should track revenue quarterly using consistent bookkeeping practices, because late registration triggers penalties and back-remittance obligations on tax you should have been collecting.

Keep GST/HST collected off line 13499. GST/HST you collect from clients belongs to the CRA, not to you. It must be remitted separately and excluded from your gross revenue on line 13499. Including it inflates both your gross and net figures, distorting your actual taxable income.

Input Tax Credits (ITCs). If you are registered, ITCs let you recover the GST/HST paid on eligible business expenses. This directly reduces your net GST/HST owing, which is a meaningful cash-flow benefit worth tracking carefully.

Partnership reporting. If you operate through a partnership rather than as a sole proprietor, each partner reports their allocated share of net business income on their own individual line 13500, based on the split defined in the partnership agreement. Depending on the partnership’s size and structure, a T5013 Partnership Information Return may also be required as a separate filing.

How Line 13500 Income Affects Your Tax Installment Obligations

Because no employer withholds tax on self-employment income, the CRA requires quarterly installment payments when net tax owing exceeds the CRA’s minimum net-tax-owing threshold.

Your prior-year line 13500 figures are what the CRA uses to calculate suggested amounts on installment reminder notices. A high-income year therefore creates larger suggested installments the following year.

Missing those installments is costly. The CRA charges interest on late or insufficient installments at its current prescribed rate, even if you pay your full balance by the April 30 balance-due deadline. The extended June 15 filing deadline for self-employed individuals does not move the payment due date.

Projecting your line 13500 income throughout the year lets you set aside the right amount and avoid interest entirely. When business income swings significantly year to year, CRA reminder amounts can be misleading in either direction. An accountant can calculate your actual obligation rather than defaulting to the prior-year estimate, preventing both underpayment interest and unnecessary idle cash.

Note: if you have ever wondered whether CRA automatic tax filing covers self-employment situations like this, the short answer is that it does not apply to self-employed filers.

Missing or Incomplete Records: What It Means for Line 13500 Accuracy

Staying on top of installments is easier when your records are in order, yet many self-employed filers quietly struggle with missing or incomplete documentation.

The CRA requires you to keep all business records for at least six years from the end of the last tax year they relate to. Without those records, the deductions that reduce line 13499 to line 13500 cannot be substantiated.

Disorganized bookkeeping or unfiled prior-year returns compound this problem. Deductions you are legally entitled to claim go unreported because receipts and invoices were never assembled, leaving your reported income higher than it needs to be.

The practical fix is catch-up bookkeeping: reconstructing transaction records from bank statements, credit card records, and available receipts. That reconstruction enables accurate T2125 preparation and produces defensible figures for both lines going back several years.

When the CRA reviews a self-employment return, it typically checks whether reported revenue aligns with third-party records, whether deductions are backed by receipts, and whether the activity shows genuine commercial intent. Gaps in any of these areas raise reassessment risk.

T-Ledgers offers catch-up bookkeeping services for self-employed filers in Etobicoke and across the GTA. If incorporation is on your radar, their T2 Corporate Tax Return: A Complete Guide for Canadian Small Businesses outlines what that transition involves.

When to Get Professional Help Filing Line 13500

Even if your records are in good shape, certain situations make professional help worth considering.

If you have multiple clients, significant deductible expenses, or unfiled returns from prior years, the T2125 calculation becomes complicated quickly. General tax software can miss CCA schedules, mishandle GST/HST reconciliation, or leave eligible deductions on the table. A CPA who works specifically with self-employed filers understands these nuances in a way that generic software does not.

T-Ledgers is an Etobicoke-based accounting firm founded by CPA Wajahat Ajmal. They specialize in T1 personal tax filing for self-employed individuals and small business owners across the GTA, with services covering bookkeeping, GST filing, payroll, and catch-up bookkeeping for clients with incomplete records.

One practical point worth knowing: professional accounting fees are a deductible business expense. The cost of getting your line 13500 right is partially offset against the income you are reporting.

Two situations warrant a professional review before you do anything else. First, if you are unsure whether your activities meet the CRA’s commercial intent threshold and therefore qualify for line 13500 at all. Second, if you have already received a CRA letter about your self-employment income, responding without professional guidance carries real risk.

Key Takeaways for Reporting Line 13500 Accurately

Here is a quick reference before you file:

• Line 13500 = net income (line 13499 minus eligible deductions via T2125). Never enter gross revenue here.
• Commercial intent is required. Hobby activities do not qualify. Keep all receipts, invoices, and mileage logs for at least six years.
• GST/HST registration is mandatory once revenue passes $30,000 (verify the current threshold with the CRA or the Excise Tax Act). Collected GST/HST is not your income and must be excluded from line 13499.
• Gaps in bookkeeping or unfiled returns inflate reported income, catch-up bookkeeping resolves this.
• A self-employed tax specialist adds real value by capturing every eligible deduction, projecting your quarterly installment obligations accurately, and ensuring your T2125 can withstand a CRA review.

Getting line 13500 right is not just about avoiding penalties. It is about paying exactly what you owe, nothing more. If any of the points above apply to your situation, working with a CPA who focuses on self-employed filers is the most reliable way to file with confidence.