Every rate on this site, and where it came from

Most calculator sites cite an authority somewhere in their copy without linking it. This page is the opposite of that: every constant we hold, its source, and the date a person last checked it.

Why this page exists

A rate hardcoded into a calculator is a claim about the world, and claims should be checkable. If you can see which authority a figure came from and when we last read it, you can decide for yourself whether to trust the answer or go to the source.

The table below covers every tool on the site whose output depends on a number somebody else sets — tax rates, benefit maximums, points grids, grading scales. Tools that run on pure arithmetic, such as a percentage or a swim pace, do not appear here because there is nothing to go out of date.

Rate-dependent calculators

Each row links to the specific page we read, not to a department home page.

CalculatorWhat we hold as a constantAuthorityVerified
🧾 GST/HST calculator GST 5%; HST 13–15% by province; PST 6–7%; QST 9.975% Canada Revenue Agency — Charge and collect the GST/HST: which rate to charge
Canada Revenue Agency — Nova Scotia HST rate decrease, transitional rules
Revenu Québec — GST and QST rates
2026-08-01
↩️ Reverse HST calculator HST 13% ON · 14% NS · 15% NB, NL, PE Canada Revenue Agency — Charge and collect the GST/HST: which rate to charge
Canada Revenue Agency — Nova Scotia HST rate decrease, transitional rules
2026-08-01
⚜️ GST + QST calculator GST 5% + QST 9.975%, both on the pre-tax price Revenu Québec — Basic rules for applying the GST/HST and QST
Canada Revenue Agency — Charge and collect the GST/HST: which rate to charge
2026-08-01
🏔️ GST + PST calculator GST 5% + PST: BC 7%, SK 6%, MB 7% Canada Revenue Agency — Charge and collect the GST/HST: which rate to charge
Government of British Columbia — Provincial sales tax
Government of Saskatchewan — Provincial sales tax
Province of Manitoba — Retail sales tax
2026-08-01
🏦 RRSP withholding tax 10/20/30% federal; 5/10/15% federal in Quebec plus 14% provincial; 25% non-resident Canada Revenue Agency — Tax rates on RRSP withdrawals
Canada Revenue Agency — Guide T4040, RRSPs and other registered plans for retirement
Revenu Québec — Source deductions of Quebec income tax
2026-08-01
🎓 Percentage to GPA 4.0, 4.3, uOttawa 10-point and OMSAS conversion bands University of Toronto — Transcript grading scales and notations
Ontario Tech University — Grading System and Academic Standing Policy (ACD 1510)
University of Ottawa — Academic Regulation A-3, Grading System
Ontario Universities' Application Centre — OMSAS
2026-08-01
📘 uOttawa CGPA calculator 10-point scale, A+=10 through F=0 (Academic Regulation A-3) University of Ottawa — Academic Regulation A-3, Grading System
University of Ottawa — Academic Regulation A-8, Evaluation of Student Learning
2026-08-01
📗 UTM CGPA calculator U of T 4.0 scale, A+ and A both 4.0, down to D− 0.7 University of Toronto — Transcript grading scales and notations
University of Toronto Mississauga — Academic Calendar, Grades and Academic Record
University of Toronto — University Assessment and Grading Practices Policy
2026-08-01
📙 Ontario Tech CGPA 4.3 scale per policy ACD 1510; no C−, D+ or D− grade Ontario Tech University — Grading System and Academic Standing Policy, ACD 1510
Ontario Tech University — Office of the Registrar, Grading
2026-08-01
📕 Guelph grade calculator Percentage scale 0–100 with 13 published letter bands University of Guelph — Undergraduate Calendar, Grades
University of Guelph — Undergraduate Degree Regulations and Procedures
2026-08-01
📓 Western grade calculator Six-band percentage scale: A+ 90–100, A 80–89, B 70–79, C 60–69, D 50–59, F <50 Western University — Senate academic policy: Marks/Grades, Definitions of Grades, Grading Scales for Undergraduate Students
Western University — Senate academic policy: Grading Scale for Graduate Students
Western University — Office of the Registrar, Transcripts
2026-08-01
📔 Waterloo average calculator Numeric 0–100 scale; grades below 32% enter averages as 32% University of Waterloo — Undergraduate Studies Calendar, Academic Regulations: Grades
University of Waterloo — Transcript legend
University of Waterloo — Science Undergraduate Office, grades and academic standings
2026-08-01
💼 EI benefits calculator 55% benefit rate; 2026 maximum insurable earnings $68,900; maximum $729/week Service Canada — EI Regular Benefits: how much could you receive
Employment and Social Development Canada — Maximum insurable earnings for 2026
Canada Revenue Agency — EI premium rates and maximums
2026-08-01
🗣️ CLB converter IRCC equivalency charts for CELPIP-General, IELTS General Training and PTE Core IRCC — Language test equivalency charts
IRCC — Express Entry: language test results
IRCC — Find your language level from your test results
2026-08-01
🧓 OAS + GIS calculator OAS $751.97 (65–74) / $827.17 (75+); GIS single max $1,123.17; recovery tax from $95,323 Employment and Social Development Canada — Maximum benefit amounts, CPP 2026 and OAS July to September 2026
Service Canada — Old Age Security payment amounts
Service Canada — Old Age Security pension recovery tax
Service Canada — Guaranteed Income Supplement: how much you could receive
2026-08-01
🤝 Ontario Works calculator Basic needs $343 single / $494 couple; shelter max $390 (1 person) to $844 (6+) Ontario Works policy directives — 6.2 Basic needs
Ontario Works policy directives — 6.3 Shelter
Ontario Works policy directives — 6.1 Calculating assistance
Government of Ontario — Financial assistance through Ontario Works
2026-08-01
♿ ODSP calculator Basic needs $825 single / $1,189 couple; shelter max $611 (1 person) to $1,259 (6+) ODSP policy directives — 6.1 Basic needs calculation
ODSP policy directives — 6.2 Shelter calculation
Government of Ontario — Income support through ODSP
2026-08-01
⚖️ Probate fee calculator ON $15/$1,000 over $50k; BC $6 then $14/$1,000 + $200; AB flat, max $525; MB nil; QC nil on notarial wills Government of Ontario — Estate Administration Tax
Government of Ontario — Calculating Estate Administration Tax
BC Laws — Probate Fee Act (SBC 1999, c.4)
Government of Alberta — Surrogate court fees
2026-08-01
💳 DTC calculator 2025 disability amount $10,138 + $5,914 child supplement; 2026 amount $10,341; credit rate 14.5% (2025) / 14% (2026) Canada Revenue Agency — Claiming the disability tax credit
Canada Revenue Agency — Line 31600, Disability amount for self
Department of Finance Canada — Delivering a middle-class tax cut
Canada Revenue Agency — Disability tax credit overview
2026-08-01
⏮️ Retroactive DTC Per-year disability amounts, 2016–2026; credit rate 15% to 2024, 14.5% for 2025, 14% from 2026 Canada Revenue Agency — Claiming the DTC, including past years
Canada Revenue Agency — Disability tax credit overview
Department of Finance Canada — Delivering a middle-class tax cut
2026-08-01
🏃 VDOT calculator Daniels-Gilbert oxygen-cost and duration equations; standard zone intensities Daniels & Gilbert — Oxygen Power, the published VDOT equations
Athletics Canada
2026-08-01
☕ Caffeine calculator The caffeine half-life used for the decay curve, which varies widely between individuals. Health Canada — Caffeine in Foods
Government of Canada — Caffeine and pregnancy
2026-08-01
💥 Rust raid cost Explosive crafting costs and wall raid quantities as at the stated date Rust — official site 2026-08-01
🏙️ Toronto closing costs Ontario land transfer tax bands, Toronto municipal bands including the graduated luxury rates introduced 1 April 2026, both first-time buyer refund maximums, and both speculation taxes. Ontario — Calculating land transfer tax
Ontario — Land transfer tax refunds for first-time homebuyers
City of Toronto — MLTT rates and fees
City of Toronto — MLTT rebate opportunities
Ontario — Non-Resident Speculation Tax
2026-08-01
🏔️ BC closing costs BC property transfer tax bands, the first-time buyer exemption thresholds and phase-out window, and the additional property transfer tax rate for foreign entities. Province of British Columbia — Property transfer tax
Province of British Columbia — First time home buyers' programme
Province of British Columbia — Additional property transfer tax
2026-08-01
🏘️ Calgary property tax Calgary's 2026 municipal and provincial tax rates for residential and non-residential property, expressed per dollar of assessment. City of Calgary — Current property tax rates
City of Calgary — Property tax rates and bill calculation
City of Calgary — Understanding your residential property tax changes 2026
2026-08-01
🍁 Express Entry CRS The full IRCC Comprehensive Ranking System points grid: age, education, language, work experience, skill transferability pairings and additional points. IRCC — Comprehensive Ranking System (CRS) criteria
IRCC — Express Entry rounds of invitations
IRCC — Language testing and Canadian Language Benchmarks
2026-08-01
🏋️ Strength standards The eight sets of IPF GL coefficients (A, B, C) for men and women, classic and equipped, powerlifting and bench press. International Powerlifting Federation — The IPF GL Coefficients for Relative Scoring (May 2020)
International Powerlifting Federation — Evaluation of Wilks, Wilks-2, DOTS, IPF and GoodLift formulas
2026-08-01
⚡ Conduit fill The Canadian Electrical Code conduit fill percentages: 53% for one conductor, 31% for two, 40% for three or more. CSA Group — C22.1 Canadian Electrical Code, Part I
Electrical Safety Authority (Ontario) — Ontario Electrical Safety Code
2026-08-01
⚖️ Spousal support The SSAG Without Child Support formula percentages, the 50% cap, the duration multipliers, and the income ceiling and floor. Department of Justice Canada — Spousal Support Advisory Guidelines
Department of Justice Canada — Without Child Support Formula
Department of Justice Canada — The Revised User's Guide
2026-08-01
🏔️ BC PNP points The full SIRS points grid from the BC PNP Skills Immigration Program Guide: work experience, education, language, hourly wage and area of employment. BC PNP — Skills Immigration Program Guide
BC PNP — Invitations to apply
WelcomeBC — Skills Immigration
2026-08-01
🌾 Alberta PNP points The full AAIP Worker Expression of Interest points grid: education, language, work experience, age, family connection, job offer, job location and regulated occupation. Government of Alberta — Worker Expression of Interest (EOI) Points Grid
Government of Alberta — How to apply to AAIP worker streams
Government of Alberta — AAIP updates
2026-08-01
🧓 CPP payment The maximum and average CPP retirement pension at 65, and the monthly adjustment percentages for starting early or late. Service Canada — CPP retirement pension: How much you could receive
Service Canada — When to start your retirement pension
Service Canada — My Service Canada Account
2026-08-01
❄️ Roof snow load The National Building Code snow load coefficients: basic factor, wind exposure, slope, accumulation and importance factors. National Research Council Canada — National Building Code of Canada
Canadian Wood Council — Design tools
2026-08-01
🧾 Income tax Federal and provincial 2026 tax brackets, basic personal amounts, CPP and EI rates and maximums, and the Ontario surtax and health premium. Canada Revenue Agency — Current year tax rates and income brackets (2026)
Canada Revenue Agency — CPP contribution rates, maximums and exemptions
Canada Revenue Agency — T4032 Payroll Deductions Tables, Ontario
2026-08-01
👶 Canada Child Benefit CCB maximum amounts by child age, the two income thresholds, and the reduction rates and fixed amounts by number of children. Canada Revenue Agency — Canada child benefit: How much you can get
Canada Revenue Agency — Canada child benefit overview
2026-08-01
📅 Benefit payment dates The 2026 payment schedules for CPP, OAS, the Canada Child Benefit, the Canada Disability Benefit, the Canada Groceries and Essentials Benefit and the veteran disability pension. Government of Canada — Benefits payment dates 2026-08-01