How to Fill Out Form NR303: Treaty Rates, Sections, and Filing

To fill out Form NR303, enter your hybrid entity’s identifying information, indicate how Canada classifies the entity, use the form’s worksheets to work out a blended Part XIII withholding rate based on which members qualify for treaty benefits, sign it, and give it to the Canadian payer before the first payment. The form is the CRA’s Declaration of Eligibility for Benefits (Reduced Tax) Under a Tax Treaty for a Hybrid Entity, available as a fillable PDF on the Canada Revenue Agency website.¹ You do not file it with the CRA. It goes to whoever is paying you in Canada.

Confirm NR303 Is Actually Your Form

The CRA has three declaration forms. NR301 is for individual non-residents. NR302 is for partnerships with non-resident partners. NR303 is only for hybrid entities, meaning organizations that one country treats as fiscally transparent while Canada treats as a separate taxable entity.² The classic case is a U.S. LLC: the IRS taxes single-member LLCs as disregarded entities and multi-member LLCs as partnerships by default,³ while Canada generally treats the same LLC as a corporation.

One boundary is worth flagging before you invest time in the form. The Canada–United States tax treaty is currently the only Canadian treaty that extends benefits to income flowing through a hybrid entity, under Article IV, paragraph 6.² If your entity’s members are residents of some other treaty country, NR303 will not get them a reduced rate; their share stays subject to the 25% withholding imposed by section 212 of the Income Tax Act.⁴

What to Have Ready Before You Open the PDF

Pull these together first. The form goes faster and the payer is less likely to bounce it back.

The entity’s full legal name, exactly as it appears on the account with the Canadian payer. A mismatch is a common reason payers refuse to apply the reduced rate.
The mailing address of the head office, with city, state or province, postal code, and country.
The foreign tax identification number. For U.S. entities this is usually the EIN issued by the IRS.
The Canadian Business Number, if the entity has one. If it does not, you can leave that field blank; a Business Number is not required to complete NR303. Entities that need one can apply using Form RC1 or through CRA Business Registration Online.⁵
The treaty article and rate that applies to your income type. This is the part most people get stuck on, so it has its own section below.
A breakdown of the entity’s members by country of residence, and each member’s ownership percentage. You need this to run the worksheet.

Identify the Right Treaty Rate

Section 3 asks you to state the treaty article and the reduced rate. Under the Canada–United States Tax Convention:

Dividends (Article X): 5% if the beneficial owner is a company that owns at least 10% of the voting stock of the paying company; 15% otherwise.⁶
Interest (Article XI): generally 10%, though categories such as interest paid to a government or on arm’s-length trade credits may be fully exempt.⁶
Royalties (Article XII): 10% on the gross amount, with certain copyright, computer software, and patent royalties potentially at 0%.⁶

Management and administration fees are also caught by the 25% withholding under section 212(1)(a).⁴ Service-type payments do not always have a dedicated treaty article, so check the convention text before assuming a reduced rate is available.

Working Through the Form

Section 1: Non-Resident Taxpayer Information

Enter the legal name, mailing address, and foreign tax ID. For a U.S. LLC that means the EIN. Compare the name field against the payer’s account records before you sign. The payer will compare them, and any discrepancy gives them a reason to keep withholding at 25%.

Section 2: Type of Hybrid Entity

Check the box that describes how Canada classifies the entity: corporation or trust. Most U.S. LLCs check “Corporation,” because that is Canada’s treatment regardless of the U.S. election. Add the Business Number or trust account number if the entity has one. Blank is acceptable if the entity has never registered with the CRA.

Section 3: Applicable Treaty Benefit

This is where the work happens. Identify the type of income (dividends, interest, royalties, or other), then use the form’s built-in worksheets to arrive at an effective rate. Worksheet A calculates the blended Part XIII effective rate; Worksheet B handles the treaty exemption percentage.

The blended-rate calculation exists because treaty benefits flow only to members who are residents of the United States. For the share of income attributable to U.S.-resident members, apply the treaty rate for that income type. For the share attributable to everyone else, including Canadian residents, the statutory 25% rate applies.² The worksheet combines them into one number the payer can apply to each payment.

A quick example. A U.S. LLC receives Canadian dividends. Eighty percent of the membership interests are held by U.S. residents entitled to the 15% portfolio dividend rate; the remaining 20% are held by non-U.S. residents. The blended rate is (0.80 × 15%) + (0.20 × 25%) = 17%. The payer withholds 17% on each dividend payment.

Section 4: Signature and Date

An authorized person prints their name, signs, gives their title, and dates the form. Authority matters here. The signer should actually have power to bind the entity under its operating agreement or equivalent, because CRA guidance expects the payer to be satisfied the declaration is legitimate before relying on it.² The date also starts the three-year validity clock, so do not backdate.

Where the Form Goes

Give the completed, signed form to the Canadian payer or the financial institution acting as withholding agent. It does not go to the CRA.⁷ The payer keeps it in their records as their justification for withholding at less than 25%. Deliver it before the first payment. Once a payment goes out at the full rate, recovery is a separate refund process.

CRA guidance lets a payer accept “the appropriate form or the equivalent information” as the written declaration of beneficial ownership, residency, and treaty eligibility.² Whether a specific payer will take a scanned copy or a digital signature is a matter of that payer’s internal policy; the CRA guidance neither requires nor forbids electronic formats. Ask the payer before assuming a PDF by email will do.

One reason payers can be strict about accepting these declarations: if they under-withhold, the financial exposure is theirs, and penalties for failing to deduct the correct amount of Part XIII tax start at 10% of the tax that should have been withheld.⁸ A clean, complete form makes life easier for everyone.

Keeping the Declaration Valid

An NR303 expires at the earliest of three events: a change in the entity’s eligibility for treaty benefits, a change in the effective withholding rate, or three years from the date it was signed.² Once it expires, the payer goes back to withholding 25% until a fresh declaration arrives.

Changes that trigger early expiry include shifts in membership. If a U.S.-resident member sells to a resident of a non-treaty country, the blended rate moves and the existing form no longer reflects reality. A new tax classification election, such as an LLC electing corporate status with the IRS, would also invalidate the declaration, because the entity may no longer be fiscally transparent in the United States. When any of these happen, prepare a new NR303 and get it to the payer. There is no notification process with the CRA; the obligation runs between the entity and the payer.

If the Payer Already Withheld 25%

If the payer withheld at the full rate because you had not submitted an NR303 yet, or because the form arrived after a payment went out, you can recover the overpayment by filing Form NR7-R, Application for Refund of Part XIII Tax Withheld, directly with the CRA.⁹ The CRA must receive it no later than two years from the end of the calendar year in which the tax was remitted.

Mail NR7-R to the Sudbury Tax Centre at Post Office Box 20000, Station A, Sudbury ON P3A 5C1, Canada.⁸ For deposit into a Canadian bank account, attach Form NR304, Direct Deposit for Non-Resident Tax Refunds; the account name has to match the name on the NR7-R.⁹ The refund path works. It is also slow. Getting a valid NR303 in front of the payer before the first payment is always the better plan.

1
Canada Revenue Agency. NR303 Declaration of Eligibility for Benefits (Reduced Tax) Under a Tax Treaty for a Hybrid Entity
2
Canada Revenue Agency. More Information on Forms NR301, NR302, and NR303
3
Internal Revenue Service. Single Member Limited Liability Companies
4
Justice Laws Website. Income Tax Act RSC 1985 c 1 (5th Supp) – Section 212
5
Canada Revenue Agency. Request for a Business Number and Certain Program Accounts
6
Internal Revenue Service. United States-Canada Income Tax Convention
7
Canada Revenue Agency. Beneficial Ownership and Tax Treaty Benefits
8
Canada Revenue Agency. NR4 – Non-Resident Tax Withholding, Remitting, and Reporting
9
Canada Revenue Agency. Applying for a Refund of Tax Overpayments