C1T1L4 · Revised 2026-10-26

Decision and objectives

Practical task: Compare a deposit and fund for a one-year spending target

Objectives: Reconcile gross return with net spendable cash; Calculate purchasing-power return; Compare products using a consistent denominator.

Required prior knowledge: C1T1L3. Classification: domestic. Revision: 2026-10-26. All fictional names, prices, rates, fees, calendars and tax schedules below are hypothetical unless explicitly identified as a dated document observation.

The best-looking reported return may not buy the most goods. Gross return measures a result before a defined set of deductions; net return measures it after those deductions. Nominal return uses money units; real return adjusts for a matching inflation measure. Always state what “gross” excludes and what “net” includes. A published fund return can already be net of fund expenses while remaining before the unit holder's tax.

Mechanics

Start with investor cash: initial outlay, income received, final disposal proceeds, separately paid fees and any tax deductions. For a single initial investment with no external contributions, holding-period return is (ending value + cash income − starting outlay − separate costs) / starting outlay. If income is already included in ending value through reinvestment, do not add it a second time.

For portfolio performance with contributions and withdrawals, this simple ratio can mislead. Later lessons compare unit-price series; investor experience with timed cash flows is a separate measurement. Define your denominator as total cash committed when an entry charge reduces the amount actually invested.

Price and return drivers

Real return = (1 + nominal return) / (1 + inflation) − 1. Subtracting inflation from return is only an approximation. Both must cover the same dates and purchasing-power context. A national consumer-price measure may not match a household's particular tuition, rent or imported-equipment bill. Taxes can be levied on nominal gains even when real purchasing power falls; do not assume an inflation adjustment exists for the product.

Worked case

Hypothetical resident-individual teaching case, one calendar year, TRY 100,000 initial cash, no financing. These are invented tax schedules, not Turkish law. Deposit D earns TRY 35,000 gross interest; hypothetical withholding is 10% of interest, or TRY 3,500; account charges are TRY 200. Net final cash = 100,000 + 35,000 − 3,500 − 200 = TRY 131,300; net nominal return is 31.3%.

Fund F's published unit value rises 34%, already after all fund-level expenses. Redemption value is TRY 134,000. A hypothetical 15% tax on the TRY 34,000 gain is TRY 5,100; investor exit charge is TRY 300. Net cash is TRY 128,600 and return 28.6%. With matching hypothetical inflation of 30%, real returns are 1.313 / 1.30 − 1 = 1% for D and 1.286 / 1.30 − 1 = −1.0769% for F. The larger published fund percentage produces less spendable cash.

Adverse case

Raise inflation to 40%, leaving the nominal results unchanged. D's real return becomes 1.313 / 1.40 − 1 = −6.2143%; F's becomes 1.286 / 1.40 − 1 = −8.1429%. Both grow in money and lose purchasing power. Alternatively, if fund value falls to TRY 90,000 and this invented schedule charges no tax on a loss, the TRY 300 exit cost leaves TRY 89,700, a 10.3% nominal loss. A negative tax amount must not be invented unless the supplied rules actually permit an offset or refund.

Practical use

For Turkish implementation, identify the income year, tax residence, individual/entity status, exact fund classification, acquisition date and tax-rule effective date before applying a rate. Check whether withholding is final or a declaration obligation remains, and whether actual fees affect the tax basis. GIB's February 2026 guide is a framework reference, not proof that one rate applies to every 2026 transaction. Include bank charges, spreads, redemption charges and embedded expenses in the right place; this worked comparison is the topic's complete hypothetical investor-cost boundary.

Decision boundaries

Use real return to assess purchasing power and net cash to fund a bill. Do not rank a short-deadline deposit against a volatile fund using a historical annual return alone. Verify timing and risk separately. Retaining a lower-return baseline can be justified when no higher-return product can meet the liability reliably. An inflation forecast is uncertain; run a range rather than declaring a precise future real gain.

Practice and references

Exercise: hypothetical initial TRY 50,000 becomes TRY 64,000, already net of fund expenses. Investor exit fee is TRY 100 and an invented tax is 20% of the positive TRY 14,000 gain. Matching inflation is 25%. Answer: tax = TRY 2,800; net cash = TRY 61,100; nominal return = 22.2%; real return = 1.222 / 1.25 − 1 = −2.24%. The exit fee is assumed not deductible from this invented tax basis. Explain why subtracting the annual management fee again would understate the result.

Takeaway: compare net cash at the same date, then translate it into purchasing power.

Reference guide: bank-deposit; mutual-fund; holding-period-return; real-return; gross-return; net-return; real-return. Next: C1T2L1. Topic test.

Sources: SPK Mutual Funds Introduction Guide — What is a fund; fund expenses; fund types; founder and manager; recorded units; date not stated; retrieved 2026-10-26; checked 2026-10-26; GIB Investment Income Tax Guide, publication 584 — Introduction; income classification; income excluded from declaration; withholding and declaration sections; date 2026-02; checked 2026-10-26. Source records: sources.json. Check the cited rule dates and confirm current dealing terms before any transaction.

Shared reference guide | Class examination