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Contracts and Invoices Basics: read before you sign, bill like a pro (education only, not legal advice)

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Education only, not legal advice. This course explains common ideas in plain words so you can ask better questions. It cannot tell you what your own contract means or what the law says about your situation. Rules differ by province, country and type of work. Before you sign something important, or if you have a dispute, talk to a licensed lawyer or paralegal, or a legal clinic.

What you'll be able to do
  • Explain what a contract is: offer, acceptance and consideration.
  • Find the main parts of a simple service agreement: scope, price, payment terms, deadlines, cancellation and ownership of the work.
  • Spot red flags such as vague scope, unlimited revisions, non-competes and auto-renewal.
  • Understand the difference between an employee and a self-employed contractor, and where to read your country's official test (Canada's CRA guide is the main example).
  • Write a clear invoice, including a sales-tax registration number if you are registered (GST/HST in Canada).
  • Follow up on late payments calmly and in writing.
  • Know where to find legal help where you live (examples from Ontario, the Philippines and Japan).
Words in this course 45Open the Vocabulary Hall
01

What is a contract?

In simple words

A contract is a promise between two sides that the law can help enforce. One side says "I will do this," the other says "okay, and I will pay you that." When both agree and both give something, you have a deal.

Key facts

Lawyers often describe a simple contract with three ideas:

IdeaPlain meaningEveryday example
OfferOne side proposes the deal"I will design your logo for $300."
AcceptanceThe other side agrees to the same deal"Yes, please go ahead."
ConsiderationEach side gives something of valueWork from one side, money from the other
  • Other things usually matter too: both sides must intend to make a real deal, and the deal must be legal.
  • A contract does not always have to be a long paper. Written terms are much easier to prove, so ask for the deal in writing (an email or message thread can help, but a signed document is clearer).
  • Rules about contracts differ by province and country, so use these ideas as a starting map only.
Step by step
  1. Take any deal you are about to make (a freelance job, a rental, a service plan).
  2. Write down the offer: who will do what, and for how much.
  3. Check for acceptance: did both sides clearly say yes to the same terms?
  4. Check consideration: what does each side give?
  5. Ask for the terms in writing and keep a copy.
  6. Check: you can say in one sentence "I will ___, and they will ___."
Watch on YouTube
Small business contracts basics (a U.S. attorney explains what makes a contract; Canadian rules can differ)All Up In Yo' Business with Attorney Aiden Durham · YouTube · youtube.com

Videos by other creators on YouTube, for reference. They are not made by or affiliated with The Future Market.

LESSON 01What is a contract?
LESSON 01 / ANIMATED LESSON / AI VOICE00:00 / 01:00
Read the video script
[Host] "A contract is just a promise that both sides agree to, and the law can help enforce."
[Text on screen: Offer] "First, an offer: one side proposes the deal. For example, I will design your logo for three hundred dollars."
[Text on screen: Acceptance] "Second, acceptance: the other side says yes to the same deal."
[Text on screen: Consideration] "Third, consideration: each side gives something of value, like work for money."
[Host] "Get the deal in writing, and remember: this is education, not legal advice."
Try it now

Pick a recent deal you made, such as a phone plan or a small job. Write the offer, the acceptance and what each side gave, in three lines.

ClaudeStuck? Copy a ready-made prompt for Claude

Copy this, open Claude, paste it, and Claude will walk you through the lesson step by step.

For a grown-up: Claude is for adults (18+). Copy this, paste it into Claude, and use the answer to explain the lesson to your child.

I'm learning "Contracts and Invoices Basics: read before you sign, bill like a pro (education only, not legal advice)" on The Future Market. Lesson 1: "What is a contract?".

What the lesson teaches:
- Idea - Plain meaning - Everyday example
- Offer - One side proposes the deal - "I will design your logo for $300."
- Acceptance - The other side agrees to the same deal - "Yes, please go ahead."
- Consideration - Each side gives something of value - Work from one side, money from the other
- Other things usually matter too: both sides must intend to make a real deal, and the deal must be legal.
- A contract does not always have to be a long paper. Written terms are much easier to prove, so ask for the deal in writing (an email or message thread can help, but a signed document is clearer).
- Rules about contracts differ by province and country, so use these ideas as a starting map only.

The exercise I'm working on:
Pick a recent deal you made, such as a phone plan or a small job. Write the offer, the acceptance and what each side gave, in three lines.

I'm stuck. Please:
1. Explain the main idea in plain, simple words with one everyday example.
2. Walk me through the exercise one small step at a time. Ask me what I've done so far before giving the next step.
3. Don't just give me the final answer. Help me do it myself, and check my work when I share it.
I'm a parent helping my child (about 8 years old) with a lesson called "What is a contract?" from the course "Contracts and Invoices Basics: read before you sign, bill like a pro (education only, not legal advice)".

Here's what the lesson says:
A contract is a promise between two sides that the law can help enforce. One side says "I will do this," the other says "okay, and I will pay you that." When both agree and both give something, you have a deal.

The activity:
Pick a recent deal you made, such as a phone plan or a small job. Write the offer, the acceptance and what each side gave, in three lines.

Please explain this so an 8-year-old understands: short sentences, a fun everyday example, and no hard words.
Then give me 3 simple questions I can ask my child to check they understood, and a way to do the activity together, one tiny step at a time.
Open Claude
Sources
My notes
02

Parts of a simple service agreement

This lesson is part of full access: every course and every level for one payment.

03

Red flags before you sign

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04

Employee or contractor?

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05

Writing a clear invoice

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06

Getting paid and handling late payments

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07

When to talk to a lawyer or legal clinic

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++

Final project

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??

Quiz

  1. What three ideas describe a simple contract?

  2. What is consideration?

  3. Name three parts of a simple service agreement.

  4. Why can "unlimited revisions" be a red flag?

  5. What is auto-renewal?

  6. Where can you learn how your country decides employee versus self-employed status?

  7. Name two factors a tax agency may look at for worker status.

  8. What can you ask a tax agency for about worker status?

  9. If you are registered to charge sales tax, what should a larger invoice show?

  10. What should you do about the small-seller limit for sales-tax registration?

  11. Where can you find a free or low-cost first talk with a lawyer?

  12. Who might give free legal help if you cannot afford a lawyer?

EX

Final exam

This lesson is part of full access: every course and every level for one payment.

CE

Certificate

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