Is a Bank Deposit Worth It? After-Tax Income, Inflation and Access

A bank deposit is a contract: you hand the bank money for a fixed term or on demand, and the bank pays it back with interest. Whether a deposit is worth it has little to do with the headline rate. It depends on three things: when you will need the money, how much of the interest you keep after tax, and whether that income outpaces rising prices. This article gives you a decision table by time horizon, one calculation you can repeat with your own numbers, and the contract terms worth checking before you sign. The worked examples use Ukraine's tax rules, deposit guarantee and current market figures, because they make the arithmetic concrete; the same questions apply to a deposit anywhere. There is no bank ranking and no "best rate" list here: rates change every week, the logic of the decision does not.

What the money is for and when you will need it

Start with the goal, not the rate. Three questions tell you what you are actually looking for:

• When will you need the money? In a month, a year, five years, or at any moment, as with an emergency fund.
• How firm is that date? A tuition payment in September is a firm date. Losing a job or a car repair is not.
• What happens if the amount is temporarily lower? For a home down payment due in six months, that is a problem. For retirement savings twenty years away, usually not.

The strength of a deposit is predictability. The balance does not fall when markets fall, and the rate on a term deposit is set in the contract. The weakness is that the return is capped at that rate, and after tax and inflation it can be zero or negative in real terms. The longer the horizon, the more that gap matters.

The table below is not advice. It is a way to sort the decision by situation:

How much to hold in reserve and where to keep it is covered in Emergency fund: what it is and how to build one. Here the focus is on judging the deposit itself.

The advertised rate versus what you actually earn

An advertised rate is the annual interest before tax. Less of it reaches your pocket.

Tax. Many countries tax deposit interest, at rates and with allowances that vary widely, so check the rules where you are a tax resident. In Ukraine, as of 20 October 2026, interest on an individual's deposit is subject to 18% personal income tax (Art. 167.1 of the Tax Code) and a 5% military levy (subpara. 1.3, para. 16-1, subsection 10, section XX), 23% of the interest in total. The bank withholds both each time it accrues interest, and that income counts as finally taxed (Art. 170.4.1). The 5% levy applies during martial law; under the current wording of the code it falls to 1.5% from 1 January of the year after the third calendar year after martial law ends.

Compounding. If interest is paid out, you simply receive the after-tax rate. If the contract adds interest to the balance monthly, the net interest earns interest itself the next month, so the result for the year is slightly higher.

Promotional terms. A higher rate may require new money, a specific term, opening online, or giving up top-ups or early withdrawal. Compare deposits on equal terms, not just on the number in the banner.

A worked example

This is an illustration, not a current bank offer or a forecast: 100,000 hryvnias (UAH) for one year at a hypothetical 12% a year, with no compounding and no fees, taxed under Ukraine's rules.

• Interest before tax: 100,000 × 12% = 12,000 UAH.
• Income tax at 18%: 2,160 UAH. Military levy at 5%: 600 UAH.
• Net income: 12,000 − 2,160 − 600 = 9,240 UAH, or 9.24% instead of 12%.
• After one year the account holds 109,240 UAH.

With monthly compounding, the net monthly rate would be 12% ÷ 12 × 0.77 = 0.77%, and after a year the account would hold about 109,642 UAH. Compounding helps, but far less than tax takes away.

A quick rule for Ukraine: net rate = contract rate × 0.77. Wherever you live, replace 0.77 with one minus your own tax rate on interest.

Inflation: comparing purchasing power

Nominal income tells you how many more units of currency you have. Real income tells you how much more you can buy with them. The Fisher equation links the two: real rate = (1 + net rate) ÷ (1 + inflation) − 1.

Continue the example with hypothetical inflation of 10% a year: 109,240 ÷ 1.10 ≈ 99,309 UAH in start-of-year prices. You earned 9,240 UAH on paper, yet the deposit's purchasing power fell by about 0.7%. A positive interest rate does not by itself mean your money kept its value.

For a sense of real figures in Ukraine:

• According to the National Bank of Ukraine's comment of 12 October 2026, consumer inflation in September 2026 was 10.0% year on year.
• The UIRD hryvnia deposit index, calculated from 20 leading banks for a standard 100,000 UAH deposit, stood on 19 October 2026 at 13.94% for 12 months, 14.41% for 6 months and 13.77% for 3 months.
• After 23% tax, 13.94% becomes 10.73%. Against 10.0% inflation, that is a real return of only about +0.7% a year.

These numbers change every month, so check fresh data before deciding. The NBU key policy rate has been 16% since 18 September 2026 (decision of 17 September 2026), and the next monetary policy meeting is scheduled for 29 October 2026. Rates on new deposits depend on the policy rate and on competition between banks.

Why money loses value and how to read a consumer price index is explained in Inflation and Why Money Loses Value, and the inflation impact calculator shows how rising prices erode a fixed sum over several years.

Early access, renewal and the contract terms

Access to the money is as important a term of a deposit as the rate. A good rate matters little if you need the money before the contract lets you take it out.

On-demand and term deposits. The rules differ by country, so read your contract. In Ukraine, under Art. 1060 of the Civil Code (Code as in force on 5 August 2026), a bank must pay out an on-demand deposit whenever the depositor asks, and a contract cannot waive that right. A term deposit is repaid when the term ends, and early only if the contract provides for it. So before signing, find the clause that says whether you can withdraw early and what happens to the interest if you do.

Rates on demand deposits can change. In Ukraine a bank may change the rate on an on-demand deposit unless the contract says otherwise; it must notify depositors of a cut, which then applies to money already deposited one month after the notice, unless the contract says otherwise (Art. 1061). The rate on a term deposit cannot be cut by the bank unilaterally, and a contract clause allowing that is void.

What happens when the term ends. In Ukraine, if you do not withdraw a term deposit when it matures, the contract is treated as extended on on-demand terms unless it states otherwise (Art. 1060, part 4). A contract may provide for something else, such as automatic renewal for a new term; then it matters at what rate the renewal happens. Check which rule your contract sets and put a reminder on the end date.

Also worth checking:

• whether you can top up the deposit and whether there is a minimum amount;
• how interest is paid: monthly, at the end of the term, or added to the balance;
• whether there are fees for withdrawing cash or transferring money after the term ends.

Splitting a sum into several deposits with staggered end dates puts part of the money within reach more often than one long deposit, and makes you less dependent on the rate on any single date.

What a deposit guarantee covers, and where it stops

Many countries run a deposit guarantee scheme that repays depositors if a bank fails, usually up to a limit per depositor per bank. In Ukraine this is the Deposit Guarantee Fund (ФГВФО), which covers individuals' deposits in Ukrainian banks.

According to the Fund's explanation, as of 20 October 2026:

• During martial law and for three months after it ends or is lifted, the Fund repays each depositor in full, including interest accrued up to the end of the day before the bank's removal from the market begins.
• After that three-month period, repayment is capped at 600,000 UAH per depositor per bank, however many accounts you hold there.
• Foreign-currency deposits are covered too, but repaid in hryvnias at the official NBU exchange rate.

The limits worth remembering apply to guarantee schemes in general:

• A guarantee is not access. It protects you if the bank fails, but it does not let you withdraw a term deposit early when the contract does not allow it.
• A guarantee returns the deposit, not the promised income. In Ukraine, interest stops accruing at the end of the day before the bank's removal from the market begins, so you do not receive interest for the rest of the term.
• Not everything a bank sells is a deposit. Under Ukraine's Law on the Household Deposit Guarantee System (Art. 2, part 1, item 3), a deposit means money held in an account or deposit under a contract with a bank. Government bonds, shares and fund units are not deposits, even when bought through a bank. Money a bank raises by issuing savings or deposit certificates is not a deposit either, so the Fund does not cover it. The exception is registered certificates issued before 30 June 2021, which the Fund still repays under the same law's transitional provisions.

For a large sum, it helps to know in advance how it fits the guarantee limit, and whether spreading it across several banks makes sense.

When a deposit fits the goal, and when to rethink the term or the mix

A deposit usually fits the goal when:

• the money is needed within months or a few years and a drop in value is not acceptable;
• the after-tax rate at least keeps up with inflation;
• the access terms match when you might need the money.

It is worth rethinking the term or the mix when:

• the after-tax rate is below inflation over a long horizon. The deposit then preserves the number of hryvnias, dollars or euros, but not purchasing power. For long goals, compare it with other instruments over the same horizon;
• the term is longer than you can realistically wait. A shorter deposit, or several deposits with staggered end dates, may fit better;
• there is a tax-free alternative for a 1–3 year goal. In Ukraine, interest on OVDPs (domestic government bonds) is exempt from both personal income tax and the military levy, so the fair comparison is the deposit rate × 0.77 against the OVDP yield. But OVDPs are not deposits and are not covered by the Deposit Guarantee Fund, and selling before maturity happens at the market price. What Are Bonds explains how bonds work, and OVDPs and Ukraine's War Bonds covers how to buy OVDPs and what they yield;
• the goal is in a foreign currency. Then compare options in the currency of the goal. In Ukraine the 12-month UIRD index for US dollar deposits stood at only 1.07% on 19 October 2026, so choosing between hryvnias and dollars is a separate decision about currency risk, not just a comparison of rates.

When you compare a deposit with market investments, remember that the deposit rate is written into the contract, while an investment's return is only an assumption: the outcome can be higher or lower, including a loss. Why a higher expected return always comes with a wider range of outcomes is explained in Risk and Return.

Frequently asked questions

Does a positive interest rate mean my purchasing power grows?

No. Purchasing power grows only when the rate after tax is higher than inflation. In the worked example, 12% before tax becomes 9.24% after tax, and with 10% inflation the real result is negative, about −0.7% for the year.

How is a deposit guarantee different from being able to take the money out right away?

A guarantee protects you if the bank fails. Whether you can take the money out at any moment is set by the contract: in Ukraine, an on-demand deposit must be paid out on request, while a term deposit can be withdrawn early only if the contract allows it. A guaranteed deposit can be locked until the end of its term, and an accessible one can exceed the guarantee limit.

Do I need to declare deposit interest in Ukraine?

In Ukraine the bank withholds the tax itself as a tax agent. If all your income came from tax agents, your obligation to file a return is treated as met and no return is filed (Art. 179.2 of the Tax Code). If you file a return for other reasons, check with the State Tax Service how to fill it in. Elsewhere, the rules depend on your country of tax residence.

How do I compare a deposit with a market investment over the same horizon?

Use the same horizon and the same amount, and compare the results after tax, fees and inflation. A deposit's income is known from the contract; an investment's return is an assumption, so look at several return scenarios rather than one number. The deposit vs. investment calculator makes this side-by-side comparison easy.

Summary

A deposit is a predictable tool for money you will need within a known period, or might need at any moment. Three steps tell you whether it fits: multiply the contract rate by one minus your tax rate on interest (0.77 in Ukraine) to get the net rate, compare that with inflation, and make sure the early-withdrawal and renewal terms match your plans. A deposit guarantee protects you if the bank fails, but it does not replace access to the money and usually has a limit; in Ukraine that limit returns at 600,000 UAH three months after martial law ends. Try different terms, rates, inflation and taxes in the deposit vs. investment calculator, remembering that the market return in it is an assumption, not a contractual promise.