Which number goes in the box

Each calculator does one sum. These notes are the part a form cannot do: which base the percent hits, which government table is in force, and which nearby number is a different product. They were written for the tools on this site. They are not a second copy of the form with the labels removed.

• A paycheque is not the hourly rate times the hours — Why $20 an hour for a year is not take-home pay. CPP, EI, vacation pay, and the overtime hour, with the 2026 figures.
• Five percent down adds a premium the flyer leaves out — On a $500,000 home, 5 percent down is $25,000. The usual insurance premium is another $19,000. Here is the payment gap at a rate you type.
• Eighteen percent of the meal is not eighteen percent of the till total — On an $80 meal in Ontario, 18 percent of the food is $14.40 and 18 percent of the after-tax total is $16.27. The card totals are $104.80 and $106.67.
• A 50 percent markup is not a 50 percent margin — On a $25 cost, a 50 percent markup is a $37.50 price. A 50 percent margin is a $50 price. The two quotes are $12.50 apart.
• Figures checked on 15 October 2026 — The 2026 EI, CPP, RRSP, TFSA, and mileage figures were read again on Canada.ca. The 2027 EI table is posted and is not in the calculators.

The calculators stay the short path. Start with a note when the official year, the province, or the wording of a quote matters. Corrections: [email protected].