First-Year Sole Proprietor in Canada: What Tax Will I Owe? (2025 Numbers)

Some version of this question lands in r/canadarevenueagency, r/PersonalFinanceCanada, and the corner-of-the-internet messages of every accountant in Canada every April:

"I'm a sole proprietor. I made about $50K this year. What kind of tax bill am I looking at? Will I get anything back, or do I owe? And if I owe, does CRA want it all at once?"

The short answers, in order: a real bill in the low five figures, no refund, yes the entire balance is due April 30. This post is the long answer, with the actual arithmetic.

Why sole proprietors almost always owe at filing time

When you work for an employer, every paycheque has federal tax, provincial tax, CPP, and EI withheld at source. Your employer remits those amounts to CRA every two weeks. By the time you file your T1 in April, CRA has already collected most of what you owe. Filing just settles the small over-or-under, which is why salaried employees often get a refund.

Sole proprietors have nothing withheld. Every client invoice you collect lands in your bank account at full face value. CRA collects nothing during the year. So when you file your T1 with a T2125 attached, the entire tax + CPP bill is computed at once, and the entire thing is due on April 30. There is no payroll system standing between you and the bill.

This is why a refund is essentially impossible for a first-year sole proprietor with no other income. There's nothing to refund. You haven't paid anything in yet.

What you actually owe on $50,000 net business income

To make the numbers concrete, assume:

• Calendar year 2025
• Net business income on T2125 line 9369: $50,000 (gross sales minus eligible expenses)
• No other income (no T4, no investment income)
• Single, no dependants, no RRSP contributions
• Resident in Ontario (we'll show BC at the end)

The four pieces of the bill

Each piece computes on its own schedule and they all add up at the end of the T1.

CPP on Schedule 8

CPP is the piece that most surprises first-year sole proprietors. As a self-employed person you pay both halves, totalling 11.9% of pensionable earnings in 2025.

• Pensionable earnings: $50,000 - $3,500 basic exemption = $46,500
• CPP contribution: $46,500 × 11.9% = $5,534

The 11.9% rate is made up of a 9.9% base portion and a 2% enhanced portion. Schedule 8 splits them differently for tax purposes:

• Base ($46,500 × 9.9% = $4,604): half is a deduction from net income (line 22200), half is a non-refundable tax credit (line 31000).
• Enhanced ($46,500 × 2% = $930): fully deductible from net income (line 22215), no credit component.

That gives you a deduction of $3,232 ($2,302 base half + $930 enhanced) and a credit base of $2,302 that's worth 14.5% federal plus your provincial bottom-bracket rate.

We covered the full mechanics in our CPP self-employment guide. The headline: on $50K of net business income, CPP alone is roughly $5,500, owed in full at filing time.

Federal income tax

After the CPP deduction:

• Taxable income: $50,000 - $3,232 (CPP deduction lines 22200 + 22215) = $46,768
• Federal tax at 14.5% (a blended full-year rate, since the federal government cut the bottom bracket from 15% to 14% effective July 1, 2025; the bottom bracket runs to $57,375): $46,768 × 14.5% = $6,781
• Less Basic Personal Amount credit: $16,129 × 14.5% = -$2,339
• Less CPP non-refundable credit (line 31000): $2,302 × 14.5% = -$334

Federal tax owing: ~$4,109

Ontario provincial tax

Ontario's bottom bracket runs to $52,886 at 5.05%.

• Taxable income (same as federal): $46,768
• Ontario tax: $46,768 × 5.05% = $2,362
• Less Ontario Basic Personal Amount: $12,747 × 5.05% = -$644
• Less CPP credit: $2,302 × 5.05% = -$116
• Plus Ontario Health Premium (this income falls in the $38,500-$48,000 tier, flat $450): +$450

Ontario tax owing: ~$2,052

Putting it together (Ontario)

That's roughly 23% of $50,000 in net business income, before considering GST/HST.

Same numbers, British Columbia

BC has a slightly lower bottom-bracket rate (5.06% to $49,279) and no health premium at this income level.

• BC tax: $46,768 × 5.06% = $2,366
• Less BC Basic Personal Amount: $12,932 × 5.06% = -$654
• Less CPP credit: $2,302 × 5.06% = -$116

BC tax owing: ~$1,596

The BC bill is about $450 lighter, almost entirely because of Ontario's Health Premium.

The GST/HST surprise

Here is the part most first-year freelancers miss: $50,000 in revenue is well past the $30,000 small-supplier threshold. Somewhere during the year, your business crossed $30K of taxable revenue across four consecutive calendar quarters, and from that point on you were required to register for GST/HST and start charging it.

If you didn't, the CRA position is that you were collecting GST/HST inside your prices the whole time. They will assess the tax against you whether or not you actually charged it.

• Ontario (HST 13%): $50,000 × 13/113 = ~$5,752 of HST that should have been remitted, less Input Tax Credits on your business expenses.
• BC (GST 5% federally + PST 7% provincially): $50,000 × 5/105 = ~$2,381 of GST owing federally, plus PST collection rules tracked separately.

The fix path:

1. Register for GST/HST (or PST in BC) immediately. Backdate the registration to when you crossed $30K.
2. Calculate the GST/HST you should have collected, less Input Tax Credits on your business purchases.
3. File the missed return(s) and remit the net.
4. Going forward, charge the tax on every invoice.

We covered the threshold and registration mechanics in When to Register for GST/HST: The $30,000 Threshold and the filing process in How to File a GST/HST Return.

"Will CRA want it all at once?"

Yes. The full balance, federal + provincial + CPP, is due April 30, 2026 for the 2025 tax year. CRA does extend your filing deadline to June 15 if you have self-employment income, but the payment deadline stays April 30. Interest on the unpaid balance accrues from May 1 even if you have not filed yet.

If you cannot pay the full amount on April 30, CRA accepts arrangements:

• Pre-authorized debit installments through My Account.
• Phone-arranged payment plan (1-888-863-8657). They will ask about your income, expenses, and a realistic monthly amount.
• Pay what you can by April 30 to minimize interest, then arrange the rest.

The interest rate is currently 7% compounded daily (the CRA prescribed rate for Q2 2026). CRA does not generally pursue collections aggressively if you are communicating and making payments.

The Year 2 ambush: quarterly installments

If your prior-year tax owing was over $3,000 ($1,800 in Quebec), CRA puts you on quarterly installments for the current year. With a ~$11,700 bill, this person will absolutely be on installments for 2026.

The installment due dates are: March 15, June 15, September 15, December 15.

CRA mails (or messages in My Account) the installment amounts in February and August. You can pay what they ask (the "no-calc" option, no interest if you pay on time), use the prior-year method, or estimate current-year. Many first-year sole proprietors get blindsided in their second year because nobody warned them this was coming.

How to make next year's bill smaller

The tax is computed on net business income, not gross. Every legitimate expense you track pulls the taxable income (and therefore the income tax) down. CPP is computed on the same net number, so deductions reduce CPP too. A $1,000 deductible expense saves you roughly $280-$295 at this income level (federal + provincial + CPP combined).

The expense lines on T2125 that solo operators most commonly miss:

• Line 8810 Office expenses. Software subscriptions, printer ink, postage. Adobe, Notion, Google Workspace, etc.
• Line 8523 Meals (50%). Coffee meetings with clients, lunch with a contractor you hired.
• Line 8521 Advertising. Domain renewal, hosting, paid social ads, business cards.
• Line 9281 Motor vehicle. Logged business kilometres × CRA rate, or actual costs prorated by business-use percentage.
• Line 9945 Business-use-of-home (Part 7). A pro-rated share of rent, utilities, internet for the room you actually work in.
• Line 9936 CCA on capital assets. Laptop, camera, monitor, etc. Depreciated over multiple years, not expensed in full, but it's still a real deduction.

We have line-by-line walkthroughs in How to File T2125, Vehicle Expense Deduction, Home Office Deduction, and Business Expenses You Are Probably Missing.

The catch: every deduction has to be backed by a receipt CRA can ask to see for six years. If you are claiming $4,000 of office expenses on T2125 line 8810 and you cannot produce the receipts when CRA writes you, the deduction gets reversed and you owe the tax plus interest.

Where ledg fits

ledg is the bookkeeping product we built for this exact person. Single-operator sole prop, no time for a bookkeeper, no patience for QuickBooks's corporate-grade interface. You connect a bank or upload a CSV, every transaction lands in a clean ledger, you tag the business ones with a category, and:

• The T2125 Preview page shows your live net business income and the exact lines of T2125 it will land on, organized Part 1 through Part 9 the way the form expects.
• The GST/HST tracker rolls a running 12-month revenue total so you see the $30K threshold the moment it crosses.
• The accountant handoff exports a PDF + CSV pack your accountant uses to actually file the T1.

We do not file your taxes. Your accountant does that. ledg keeps the books accountant-ready year-round so April is a 30-minute handoff instead of a panic.

Try ledg free, 100 entries, no credit card.

TL;DR

• A first-year Canadian sole proprietor with $50,000 net business income owes roughly $11,200 to $11,700 in combined federal tax + provincial tax + CPP, depending on province.
• A refund is essentially impossible because nothing was withheld during the year.
• The full balance is due April 30 even though the filing deadline for self-employed is June 15.
• $50K of revenue is past the $30K GST/HST threshold; if you were not registered, you have a separate sales tax problem to clean up.
• If your prior-year tax owing was over $3K, CRA puts you on quarterly installments for the next year.
• Track every legitimate business expense, with receipts kept for six years. Deductions reduce both income tax and CPP.

The first year hurts. The second year hurts less if you set aside ~30% of every business deposit and keep clean books.