To estimate your New Brunswick income taxes using our tool, you will need to input your gross income based on your pay frequency, including any bonuses, RRSP withdrawals, or eligible tax credits and deductions. Once you have entered this information, review the output to see how federal and provincial taxes, CPP, EI, and your net pay are calculated for your specific situation.
However, not getting these details right can lead to either underpayment or overpayment of taxes. Common errors include forgetting to add the extra CPP contribution, failing to take advantage of the Low-Income Tax Reduction, failing to report all income on Line 15000, or missing eligible deductions, such as RRSP contributions.
The following sections will guide you through each step of the calculator and highlight common filing mistakes that can affect your New Brunswick income tax calculation.
How to Use Our New Brunswick Income Tax Calculator
To estimate your income taxes for the 2026 tax year in New Brunswick, start by entering your gross income (according to the appropriate pay frequency for New Brunswick), adding any bonuses, earnings, or tax credits if applicable. After that, review the output to see the calculations for income tax, deductions, and net pay.
The 5 steps for using our NB income tax calculator are:
- Step 1: Confirm that the calculator is set to New Brunswick as your province of employment.
- Step 2: Enter your gross taxable income, either as an annual total or according to your specific pay frequency.
- Step 3: Include any additional taxable income, such as bonuses, RRSP withdrawals, or other earnings, if applicable.
- Step 4: Ensure that the federal and New Brunswick basic personal amounts are applied correctly through the calculator’s defaults or TD1 input.
- Step 5: Review the output, which should include federal tax, New Brunswick tax, CPP, EI, net pay, marginal rate, and average rate.
Please remember that the result is an estimate and should not be used as a substitute for your T1 return or a T4 slip from your employer.
What to Consider when Using Our New Brunswick Income Tax Calculator
If you moved provinces during the year, choose the province where you had the most significant residential ties on December 31. This matters because on that day, people pay provincial tax on all their income from everywhere if they are considered residents of that province for that year.
If you have a second job or get taxable benefits not shown on your main T4, add them together. This helps the calculator put your income tax in the right tax brackets.
Also, if you changed your TD1 or TD1NB personal tax credit claims during the year but the calculator still uses the default code, your estimated take-home pay could be wrong by several hundred dollars.
Common Income Tax Calculation Mistakes to Avoid in New Brunswick
In New Brunswick, incorrectly calculating your income tax can occur for several reasons, including missing required payroll deductions, forgetting to report all income on Line 15000, failing to include eligible deductions, using the wrong basic personal amount for provincial credits, and overlooking the New Brunswick Low-Income Tax Reduction. These errors can result in financial issues, such as unexpected debt or missed refunds.
Here is a list of common errors:
Skipping Mandatory Payroll Deductions Before Calculating Taxable Income
Before any taxes are calculated, mandatory federal payroll deductions are taken from your income. EI premiums are deducted at 1.63% of your gross annual income, with a maximum limit of $1,123.07. CPP contributions are 5.95% on earnings over the $3,500 basic exemption, capped at $4,230.45.
If your income is between $74,600 and $85,000, an additional CPP2 charge of 4% applies to that income range, up to a maximum of $416. Missing the CPP2 charge is a common payroll error among mid- to high-earners.
Omitting All Income Sources from Line 15000
When calculating total income for Line 15000, remember that it is not limited to employment earnings reported on your T4 slip. It also includes EI benefits, investment income, pension income, and other sources of income. Be sure to report every slip.
Forgetting Eligible Deductions Before Calculating Taxable Income
Do not forget to account for eligible deductions before determining your taxable income. Contributions to an RRSP directly decrease your taxable income. Additionally, if you have unreimbursed employment costs, make sure your employer has signed a T2200 form, as this will allow you to claim deductions using the T777 form.
Ignoring the New Brunswick Low-Income Tax Reduction
Eligible low-income filers can reduce their provincial tax payable through the New Brunswick Low-Income Tax Reduction. For the 2025 tax year, the single-filer threshold is $21,920, with a 3% phase-out rate for income above this level. Taxpayers who overlook this reduction may miss out on significant savings.
Using the Wrong Basic Personal Amount for Provincial Credits
Be aware that the basic personal amounts for federal and New Brunswick credits are different. When calculating provincial non-refundable credits, use New Brunswick’s lowest tax rate of 9.40% instead of the federal rate. Mixing these rates can result in either inflated or reduced provincial credits.
How Basic Personal Amount Reduces Tax Payable in New Brunswick
The basic personal amount is a non-refundable tax credit that lets you earn a minimum amount of income before you have to pay federal income tax. For 2026, the federal basic personal amount is set at $16,452, while the New Brunswick basic personal tax credit is $13,664. Both of these amounts are non-refundable credits, meaning they reduce your tax payable rather than your income.
A non-refundable credit directly reduces the tax you owe; however, if the credit exceeds your tax payable, the unused portion is lost and cannot be refunded. The Canada Revenue Agency calculates the federal credit by multiplying the BPA by the lowest federal tax rate.
If your net income in 2026 is $181,440 or less, you get the full federal BPA. If you earn $258,482 or more, you qualify for a minimum BPA of $14,829. This federal BPA includes a base amount of $14,829 plus an additional $1,623, which decreases once your income exceeds $181,440 and is eliminated over $258,482.
In New Brunswick, the BPA for 2026 is $13,664, multiplied by the provincial tax rate of 9.4%, yielding an estimated credit of about $1,284. Unlike the federal BPA, the New Brunswick amount does not decrease for higher incomes.
FAQs about the New Brunswick income tax calculator
How does the New Brunswick low-income tax reduction work?
The New Brunswick low-income tax reduction completely eliminates provincial income tax for individuals with a taxable income of approximately $21,920 or less for the 2025 tax year. Filers can add $802 for a spouse or common-law partner and an additional $802 for an eligible dependant. For incomes above the threshold, the reduction is gradually phased in at a rate of 3% of the adjusted family net income that exceeds the limit, until the full reduction is phased out.
Does New Brunswick have a provincial income surtax?
New Brunswick’s Income Tax Act allows for an 8% surtax on provincial tax amounts over $13,500. However, the Canada Revenue Agency’s Form NB428 does not include this surtax in its calculations. After the tax brackets were restructured in 2023, consolidating five brackets into four with a top rate of 19.50%, the surtax is not applied on current tax returns.
What is the capital gains tax rate for residents of New Brunswick?
The capital gains inclusion rate will stay at 50% for the 2025 and 2026 tax years. The federal proposal to raise this rate to two-thirds has been cancelled. In New Brunswick, the capital gains rules align with the federal guidelines, with no extra provincial rate or tax.
