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Course Library · Lesson 5 of 6
Money · Guided lesson

Test a promotional payoff deadline

About 10 minutes · 3 reading + 7 practice and checks
Time includes reading, practice, and questions. Extra videos or further study are optional.
See this course’s project requirements

A reconciled fictional card statement with daily-interest estimate, grace-period decision, payment allocation and a deadline plan.

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 reconciled credit-card transaction register and statement check.
  • A billing-cycle timeline with current balance, statement balance and applicable payment action.
  • A balance-days interest worksheet with rate units and calculation limits.
  • A payment-allocation ledger with category balances and a total-debt check.
  • A promotional repayment calendar with a full-payoff check and offer-type comparison.
  • A next-statement audit with credited payments, new charges and an exception note.

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. Fictional $600 promotional balance; six equal payments before expiry; no fees or new charges. Offer Z is true zero APR during its term; offer D conditionally waives accrued $90 only if fully repaid by expiry.

The idea

A repayment plan must meet the actual offer’s deadline; true zero-APR and deferred-interest offers do not share the same failure consequence.

Follow along

Test a promotional payoff deadline — worked practice

A repayment plan must meet the actual offer’s deadline; true zero-APR and deferred-interest offers do not share the same failure consequence.

Use paper or a local table; label all amounts as fictional USD unless the case names another unit. Fictional $600 promotional balance; six equal payments before expiry; no fees or new charges. Offer Z is true zero APR during its term; offer D conditionally waives accrued $90 only if fully repaid by expiry.

Contrasting promotional rules

Paste at A1.

AOfferBPrincipal USDCPayments before expiryDPractice expiry rule
Z6006True zero APR during term
D6006Accrued USD 90 waived only if fully paid by expiry

Copy as plain text
  1. 1. Step 1: Compute the equal full-payoff amount

    Compute the equal full-payoff amount.

    You should see: 600/6=$100 per payment.

    A repayment plan must meet the actual offer’s deadline; true zero-APR and deferred-interest offers do not share the same failure consequence.

  2. 2. Step 2: Test a $90 payment plan

    Test a $90 payment plan.

    You should see: Six payments total $540 and leave $60.

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

  3. 3. Step 3: Apply each supplied expiry rule

    Apply each supplied expiry rule.

    You should see: Z begins the stated later rate on remaining debt; D adds the supplied $90 deferred charge when the full-payoff condition fails.

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

  4. 4. Step 4: Create a deadline check record

    Create a deadline check record.

    You should see: Verify offer type, payoff amount, timing and actual crediting before expiry; do not assume both are retroactive.

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

Now change one thing

There are only five payments before expiry. Equal full-payoff amount?

Your work

What to finish

A promotional repayment calendar with a full-payoff check and offer-type comparison.

Common mistake

Watch for this

Treating a true zero-APR offer as though it automatically adds retroactive interest.

How can I tell I understand it?

Calculate a deadline payoff and distinguish true zero-APR from deferred-interest consequences on a new supplied case, with a visible intermediate check and no unsupported real-world promise.

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.

1$480 balance with four equal credited payments before expiry: full-payoff payment?
2Which supplied offer adds a previously accrued charge after missing full payoff?
3A scheduled final payment has not posted before expiry. What remains unverified?
0 of 3 answeredApply the lesson to a short question, then review the explanation.
5
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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Sources and further reading

Explore the references behind this lesson.

CFPB — Credit cards
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 — What is a grace period for a credit card?
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 — How to understand special promotional financing offers on credit cards
Source & access notes · checked 2026-10-01

Checked the distinction between true promotional zero APR and conditional deferred interest; no current offer, rate or universal minimum-payment formula is claimed.

Access: Readable official archived CFPB webpage inspected with the web reader on 2026-10-01; archive status retained.

Reuse: Original fictional promotional balances and deadlines. No source exercise copied.

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