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Money · Guided lesson

Separate shared and personal expenses

About 8 minutes · 3 reading + 5 practice and checks
Time includes reading, practice, and questions. Extra videos or further study are optional.
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A fictional shared-cost agreement and balanced settlement ledger with equal/weighted splits, individual exclusions and departure reconciliation.

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.
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Before you begin

The idea in everyday life

This is an original fictional practice case. No account, payment, personal record or outside participation is required. Ari pays groceries $90 for Ari, Bo and Cy; Bo pays $30 for Bo’s personal shoes; Cy pays $60 shared internet for all three.

The idea

A settlement only works after each expense has an agreed set of participants; a personal purchase is not split automatically.

Follow along

Separate shared and personal expenses — worked practice

A settlement only works after each expense has an agreed set of participants; a personal purchase is not split automatically.

Use paper or a local table; label all amounts as fictional USD unless the case names another unit. Ari pays groceries $90 for Ari, Bo and Cy; Bo pays $30 for Bo’s personal shoes; Cy pays $60 shared internet for all three.

Shared and personal receipt rows

Paste at A1.

AReceipt IDBPayerCItemDUSDEBeneficiaries
G90AriGroceries90Ari, Bo, Cy
S30BoPersonal shoes30Bo only
I60CyInternet60Ari, Bo, Cy

Copy as plain text
  1. 1. Step 1: Assign each cost to its actual participants

    Assign each cost to its actual participants.

    You should see: Groceries and internet are shared by three; shoes are Bo-only.

    A settlement only works after each expense has an agreed set of participants; a personal purchase is not split automatically.

  2. 2. Step 2: Total only shared expenses

    Total only shared expenses.

    You should see: 90+60=$150.

    Keep this intermediate result so the final decision can be checked.

  3. 3. Step 3: Compute an equal shared obligation

    Compute an equal shared obligation.

    You should see: 150/3=$50 each.

    Keep this intermediate result so the final decision can be checked.

  4. 4. Step 4: Record individual exclusions

    Record individual exclusions.

    You should see: Bo’s $30 shoes remain personal and do not enter the shared settlement.

    Keep this intermediate result so the final decision can be checked.

Now change one thing

Shared internet rises to $75. Equal shared obligation per person?

Your work

What to finish

A shared/personal expense register with explicit participants.

Common mistake

Watch for this

Splitting a personal item because it appears on a shared receipt.

How can I tell I understand it?

Classify expenses by participant set before splitting shared costs on the supplied changed case while preserving the stated rule and checking the final record.

Try 3 questions

Quick knowledge check

Answer all 3 questions. Get at least 2 right and the lesson completes automatically.

Not yet passed

You’ll get an explanation for each answer. Signed in? Your results save to your account.

1Shared food $120 and utilities $60 for three people, plus one person’s $30 shoes: equal shared share?
2A receipt includes a personal and shared item. What should the register do?
3A cost’s participant agreement is unknown. Best treatment?
0 of 3 answeredApply the lesson to a short question, then review the explanation.
1
Finish this lesson

Pass the check. We’ll save the progress.

Answer all 3 questions above and get at least 2 right. You can review the explanations and try again.

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Tools, templates, and lesson sources

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Sources and further reading

Explore the references behind this lesson.

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.

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