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Course 158 · Money course 29

Settle Shared Household Expenses Fairly

Practice settle shared household expenses fairly with complete fictional records, worked calculations and changed-input checks.

Before you start

Use the supplied fictional case; paper and a calculator are sufficient.

Build a Budget That Runs Itself See everything you’ll need

Free download · Original practice data · No external account required. Download the starter pack

What you’ll leave with

A fictional shared-cost agreement and balanced settlement ledger with equal/weighted splits, individual exclusions and departure reconciliation.

Start course Start without an account. Sign in to save lesson progress across devices.

Your project

Start with the practice files. Build your project one lesson at a time.

Practice files are free without an account. Sign in to save your project record in My Proof: a description, checklist, and optional work link. Keep the original files in your own app or notebook; saving a project record does not upload them.

  1. Get your materialsDownload practice filesSupplied practice cases, a blank working record, complete lesson instructions, and annotated worked examples.
  2. Make your projectView the project checklist Work in your own notebook, document, or software. Use the supplied practice examples when you prefer.
  3. Keep a private recordSave a project record Sign in to save a description and checklist, then return to update them.
Course handbook

Know the route before you begin.

Here’s what you’ll need and what you’ll make. You can return to this guide during any lesson.

Who this is for

Learners ages 14+ practicing independently; adult-only transactions are studied as fictional future decisions.

Prepare before lesson one
  • Use the supplied fictional case; paper and a calculator are sufficient.
  • Recommended preparation: Build a Budget That Runs Itself. Do not supply private financial documents.
Your final project

Finish with proof you can use.

A fictional shared-cost agreement and balanced settlement ledger with equal/weighted splits, individual exclusions and departure reconciliation.

Save a project record in My Proof
See project checklist and review criteria

Keep your working files in your own notebook or software. Save a private description, checklist, and work link in My Proof.

What to include

  • A shared/personal expense register with explicit participants.
  • An equal/weighted contribution comparison and rule record.
  • A sum-zero shared-expense settlement ledger.
  • A two-transfer settlement plan and post-settlement balance check.
  • A refund/departure adjustment log with revised settlement balances.
  • A complete fictional shared-finance agreement and audit record.

Review and revise

Use these criteria to check your work and choose what to improve.

  • All supplied records reconcile and the decision uses the named case rules.
  • Calculations show units, intermediate values and a second check.
  • Changed-input practice revises the affected result and identifies uncertainty.
  • The final project combines six lesson records, separates fictional assumptions from current rules, and states a supported next step.
Three ideas to help you along the way
Three useful ideas

The rules behind the steps.

01

Trace the money

For settle shared household expenses fairly, keep the source amount, transformation and resulting balance together.

02

Keep the assumption visible

Use the stated rate, date, permission and case rule; a real arrangement can produce a different result.

03

Test the decision

Use a changed input and a clear stop or review condition before turning this practice into an action.

What do these words mean?
Key words

Key terms worth knowing.

Participant set
The people whose agreed obligations include a given expense.
Weight
A stated proportion used to allocate an agreed cost.
Net position
Amount paid minus allocated obligation under the chosen sign convention.
Settlement
Transfers that clear existing obligations without creating new underlying expenses.
Your route

6 lessons.
One useful project.

Work in order the first time. Each lesson makes something the next lesson can use.

  1. 1
    Up next

    Separate shared and personal expenses

    Classify expenses by participant set before splitting shared costs.

  2. 2
    9 min

    Compare equal and weighted contributions

    Calculate category-specific equal and weighted contributions under an explicit agreement.

  3. 3
    12 min

    Build a multi-payer settlement ledger

    Compute and validate each person’s signed paid-minus-obligation position.

  4. 4
    10 min

    Settle balances with a minimal payment list

    Create a transfer list that clears supplied household balances without double counting costs.

  5. 5
    10 min

    Reallocate a refund and a departure cost

    Link shared refunds to original costs and recompute participant obligations.

  6. 6
    13 min

    Write a shared-cost agreement and audit it

    Assemble a category-specific shared-cost agreement and verify it against a changed case.

Use the tools

Tools to help you practice.

See all tools
ZIP · practice files

Settle Shared Household Expenses Fairly practice files

Supplied practice cases, a blank working record, complete lesson instructions, and annotated worked examples.

Text worksheet

Your course project worksheet

A downloadable text worksheet with each lesson’s working output, space for your answers, and the shared final-project checklist. Save your own copy.

Source transparency

Sources and further study.

Explore the references behind the lessons and take your learning further. Source notes explain access and reuse.

CFPB — Bank accounts
Source & access notes · checked 2026-10-01

Official page opened/read during Money expansion authoring; checked the relevant concept and access state. These sources do not establish funding eligibility.

Access: Readable official webpage inspected with the web reader on 2026-10-01. No interactive-tool operation is claimed.

Reuse: Original fictional practice, questions and calculations; paraphrased concepts with a source link. No source exercise copied.

CFPB — A joint checking account owner took the money and closed the account
Source & access notes · checked 2026-10-01

Official page opened/read during Money expansion authoring; checked the relevant concept and access state. These sources do not establish funding eligibility.

Access: Readable official webpage inspected with the web reader on 2026-10-01. No interactive-tool operation is claimed.

Reuse: Original fictional practice, questions and calculations; paraphrased concepts with a source link. No source exercise copied.

CFPB — Can I remove my spouse from our joint checking account?
Source & access notes · checked 2026-10-01

Official page opened/read during Money expansion authoring; checked the relevant concept and access state. These sources do not establish funding eligibility.

Access: Readable official webpage inspected with the web reader on 2026-10-01. No interactive-tool operation is claimed.

Reuse: Original fictional practice, questions and calculations; paraphrased concepts with a source link. No source exercise copied.

Ready when you are

Start with the first useful move.

You’ll always know what to do, what to make, and where to go next.

Start lesson one