The Real Cost of Buying Now and Paying Later
Credit lets you buy using borrowed money. Compare the full cost, including any interest and fees, with the cash price. Track how charges and payments change a balance, including what remains after a year.
What a learner can do afterwards
- Work out the total repaid under a credit offer and compare it against the cash price
- Explain an annual interest rate and distinguish a stated simple-interest calculation from actual card charges
- Use a starting balance, stated yearly charges and minimum payments to find the year-end balance; compare it with a higher-payment plan
1 · Read
Credit uses borrowed money. Some offers add interest or fees; others do not. Multiply equal payments by their count, then add any deposit and fees outside them. Or add the amount borrowed and total interest, then any deposit paid separately and fees not already counted. The deposit adds to purchase cost, not loan repayments. Compare the full cost with the cash price and check affordability. These are practice offers. If under 18, ask a trusted adult about age and local rules before applying.
You have compared recurring prices by adding up payments. A credit offer has a set repayment term. Suppose it asks for a £50 deposit and 15 payments of £30, with all interest included and no separate fees. The full cost is £50 + £450 = £500. If the cash price is £460, credit costs £40 more. A lower monthly payment alone does not tell you the full cost.
An annual interest rate is a percentage expressed for one year. For one year of simple interest, multiply the unchanged amount borrowed by the rate divided by 100. At 20%, £600 gives £120 interest. Here 20% means one fifth. Card charges depend on balances, dates and terms. Added interest may itself attract interest later. This simple-interest sum is not a forecast of a card bill.
The minimum is the smallest card payment required by the due date. It may equal the full balance; it need not clear the debt. Its interest share varies. With positive interest and no new spending or extra fees, higher payments can reduce interest and repayment time. If you qualify for a purchase grace period, paying the full statement balance by its due date can avoid purchase interest. Check the conditions; cash withdrawals and fees may follow different rules.
To check a year's progress, add interest, fees and new spending to the starting balance, then subtract payments. Suppose £300 is owed at the start, £60 interest is added and £120 is paid over a year, with no fees or new spending. The end balance is £300 + £60 - £120 = £240. Payments totalled £120, but the debt fell by £60. Compare plans using their stated charges and payments.
£120 paid minus £60 interest gives a £60 fall in the balance.
Compare full costs, including separate fees. Check interest rules and track how charges and payments change the balance.
This lesson, question bank and flashcards were written for this dataset. The credit offers and repayment figures are practice examples.
The readings and flashcards were written for this dataset. The linked video, "Monthly payment versus total cost", is credited to Khan Academy in the supplied source record.
More to read
Add the full credit purchase cost
Credit creates a repayment promise. Some offers charge interest, some charge fees, and some charge neither. Read the actual offer before deciding what it costs.
Suppose an item costs £180 cash. A practice credit quote requires a £30 deposit and six payments of £28. Interest is included, with no separate fees. The payments total £168, so the purchase costs £198 altogether. That is £18 above the cash price.
Do not add interest again when it is already included in the payments. Add any deposit and required fees paid outside them. If a quote instead gives the amount borrowed and total interest, add those, then any separately paid purchase deposit and fees not already counted. The deposit is part of the purchase cost, not repayment of the loan. Count each cost once.
Check affordability as well as total cost. Every required payment must fit alongside other needs. A low total does not make an unaffordable payment safe.
Count how many payments
Read both the payment amount and the payment count. Include any deposit and fees outside the payments when comparing offers for the same purchase.
Suppose one offer requires twelve payments of £32. Another requires twenty-four payments of £19. Both include interest, with no deposit or separate fees. The first costs £384; the second costs £456. The second monthly payment is £13 lower, but its full cost is £72 higher.
This does not mean every longer plan costs more. Different rates, fees and offers can change the result. Calculate each total from its own terms.
A longer plan may make individual payments easier to afford while raising the full cost. Check both the payment schedule and the total, rather than deciding from either one alone.
A yearly rate and a card bill
An annual interest rate is expressed as a percentage for one year. A card's cash interest charge also depends on balances, dates and terms. Added interest may attract interest later.
For a stated one-year simple-interest calculation, an unchanged £250 at 12% produces £30 interest: £250 x 12 / 100. That calculation does not predict a card bill with changing balances or interest added during the year.
If a card offers a purchase grace period and you meet its conditions, paying the full statement balance by the due date can avoid purchase interest. Check those conditions. Cash withdrawals, fees and carried balances may follow different rules.
The minimum is the smallest required payment by the due date. Its interest share varies. Use the statement's figures instead of assuming that most of every minimum payment is interest.
Check the balance at the year's end
Payments reduce what is owed, while interest, fees and new spending can add to it. Use figures from the same period and count each charge once.
Start with the opening balance. Add new spending, interest and fees, then subtract payments to find the ending balance.
Suppose £350 is owed at the start of a year. Interest adds £42, fees add £8 and payments total £140. There is no new spending. The ending balance is £350 + £42 + £8 - £140 = £260. Payments totalled £140, but the balance fell by £90 because charges added £50.
For a comparison, use each plan's stated charges and payments. An annual rate alone does not supply the exact future interest when balances and payment dates change.
Check a replacement loan's total
Debt consolidation uses a new loan to repay existing debts. One payment to manage does not by itself mean a cheaper loan.
Compare the remaining payments on existing debts with the new loan's full payments and separate fees. Check repayment time, affordability and any charges for ending the old loans early.
Suppose the old debts' remaining payments total £900, including all charges. A replacement requires twenty-four payments of £38 plus a £30 fee. Its payments total £912, making the full cost £942. In this practice comparison, replacement costs £42 more. There are no early-repayment charges on the old debts.
New spending on cleared cards creates debt again. Someone unable to meet required payments can seek qualified debt advice rather than assuming another loan will solve the difficulty.
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