TaxDesk field library

Find the rule. Set the date. Keep the evidence.

Use practical Canadian tax guides and tools to identify obligations, calculate dates, and organize supporting records.

A useful tax record answers

01What applies?Entity, account and activity
02When is it due?Period, filing and payment
03What proves it?Source, status and history

Start with your task

Use these guides to organize your tax work

TaxDesk compliance calendar with filing obligations across entities.

Guides · Updated Jul 2026

Canadian corporate tax obligations

The full range of what a Canadian corporation can be on the hook for — filings, remittances, elections and records — organized by category and by what triggers each one.

Read the guide

Guides · Updated Jul 2026

Organizing tax across a multi-entity group

Entity inventory, ownership structure, program accounts, one filing calendar, shared tax attributes and intercompany balances — how to keep a Canadian corporate group organized.

Guides · Updated Jul 2026

What belongs in a corporation's tax file

A practical structure for a Canadian corporation's tax records — permanent vs. annual, ownership documents, tax attribute support, intercompany paperwork and CRA correspondence.

Working tools

Calculate an amount or find a due date

01CalculatorsCorporate tax calculatorCalculate federal and provincial corporate tax for CCPCs and general corporations, including the small business deduction and investment income.02ReferencesCorporate tax ratesReference tables for federal and provincial corporate tax rates, CCPC benefits and small business deduction limits across all jurisdictions.03CalculatorsTax deadlines toolTrack Canadian corporate tax, GST/HST, and payroll remittance deadlines, and export them to your calendar.

Subject

15 resources

Guides link to primary sources and state the next steps.

Corporate tax calculator

Calculators

Calculate federal and provincial corporate tax for CCPCs and general corporations, including the small business deduction and investment income.

Updated Jan 2026

Corporate tax rates

References

Reference tables for federal and provincial corporate tax rates, CCPC benefits and small business deduction limits across all jurisdictions.

Updated Jan 2026

Tax deadlines tool

Calculators

Track Canadian corporate tax, GST/HST, and payroll remittance deadlines, and export them to your calendar.

Updated Jan 2026

Withholding tax calculator

Calculators

Determine Canadian withholding tax rates on payments to non-residents based on tax treaties and payment types.

Updated Jan 2026

CPP/EI calculator

Calculators

Calculate CPP and EI contributions, maximums and stop dates by salary and pay frequency, with 2025 and 2026 limits.

Updated Jan 2026

EIFEL calculator

Calculators

Calculate the Excessive Interest and Financing Expenses Limitation under s.18.2 ITA, including ATI and the 30% fixed ratio.

Updated Jan 2026

Canadian business tax: a practical operating guide

Guides

A practical guide to Canadian business taxation across corporate structures — obligations, rates and how the pieces fit together.

Updated Jul 2026

GST/HST for Canadian businesses: an operating guide

Guides

Understand GST/HST registration, filing frequency, input tax credits and compliance obligations for Canadian businesses.

Updated Jul 2026

Canadian corporate tax obligations

Guides

The full range of what a Canadian corporation can be on the hook for — filings, remittances, elections and records — organized by category and by what triggers each one.

Updated Jul 2026

What belongs in a corporation's tax file

Guides

A practical structure for a Canadian corporation's tax records — permanent vs. annual, ownership documents, tax attribute support, intercompany paperwork and CRA correspondence.

Updated Jul 2026

Organizing tax across a multi-entity group

Guides

Entity inventory, ownership structure, program accounts, one filing calendar, shared tax attributes and intercompany balances — how to keep a Canadian corporate group organized.

Updated Jul 2026

CDA, GRIP, RDTOH and corporate losses

Guides

A plain-English guide to the capital dividend account, GRIP, eligible and non-eligible RDTOH, and non-capital, net capital and ABIL loss pools — what they are and where they come from.

Updated Jul 2026

Shareholder and intercompany loans

Guides

The difference between a shareholder loan and an intercompany loan, subsection 15(2) at a high level, interest and documentation, and reconciling balances between entities.

Updated Jul 2026

Why ownership and share-class records matter

Guides

Legal vs. beneficial ownership, voting vs. value, paid-up capital, dividends by share class, associated corporations and changes of control — what the ownership record needs to show.

Updated Jul 2026

Canadian business entity types and their tax obligations

Guides

Corporations, professional corporations, partnerships, trusts and sole proprietorships — how each is taxed, and why 'holding company' isn't a separate legal entity type.

Updated Jul 2026

Use the library with your team

Choose guidance for your team and responsibilities.

CPA firms must review work across many client entities. Corporate teams must connect ownership, obligations, and evidence across a group. Choose the guidance that matches your work.

CPA firmsReview obligations, records, and work linked to supporting documents across many client entities.Corporate groupsKeep each legal entity distinct while seeing the group’s tax work in one place.

Editorial standard

Check the source, date, and limits.

Technical guides link to CRA, Finance Canada, or legislation where applicable.

Each guide shows its update date and links to primary source material.

Confirm estimates and guidance before you file or make a transaction.

From reference to record

Turn guidance into work your team can track.

Keep entities, tax-program registrations, obligations, and documents in one workspace. Review each record with its supporting documents.

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