Best Bonds to Buy in Poland 2026: Treasury Bonds (EDO, TOS, COI, ROS) Compared
Complete comparison of all Polish treasury bond types in 2026 — EDO, TOS, COI, ROS, OTS, DOS. Current rates, inflation protection, early redemption penalties, tax treatment, and ladder strategies.
Quick Answer
EDO (10-year, CPI + 1.00%) is the best long-term bond in Poland for 2026 — compound interest and full inflation indexation make it the strongest real-return vehicle among treasury bonds. For medium-term goals, COI (4-year, CPI + 1.00%) offers inflation protection without a decade-long commitment. TOS (3-month, ~3.00% fixed) is best for parking cash you need soon. DOS (2-year, ~3.30% fixed) bridges the gap between TOS and COI. ROS (6-year, CPI + 1.25%) is available only to recipients of the 800+ child benefit, offering a higher margin than EDO.
Why Polish Treasury Bonds in 2026?
Polish treasury bonds (obligacje skarbowe) are backed by the full faith and credit of the Republic of Poland. With the NBP reference rate at 5.75% and CPI inflation forecast at 4.0–5.0% for 2026, inflation-linked bonds remain one of the few instruments that historically have preserved purchasing power for Polish savers.
Key advantages over bank deposits:
- Inflation indexation (COI, EDO, ROS, ROD) — interest rate adjusts automatically with CPI
- No bank failure risk — government guarantee, not BFG (which caps at 100,000 EUR)
- Tax simplicity — 19% Belka tax is automatically withheld
- Low minimums — 100 PLN per bond, purchasable online
In 2025, Polish investors purchased over 72 billion PLN in treasury bonds — a record year that suggests growing awareness of these instruments.
All Polish Treasury Bond Types Compared
| Feature | OTS | DOS | TOS | COI | ROS* | ROD* | EDO |
|---|---|---|---|---|---|---|---|
| Duration | 3 months | 2 years | 3 years | 4 years | 6 years | 12 years | 10 years |
| Rate type | Fixed | Fixed | Fixed | CPI-indexed | CPI-indexed | CPI-indexed | CPI-indexed |
| Current rate | ~3.00% | ~3.30% | ~3.30% | 6.75% yr1, CPI+1.00% | 6.80% yr1, CPI+1.25% | 7.05% yr1, CPI+1.50% | 6.80% yr1, CPI+1.00% |
| Compounding | No | Annual | Annual | Annual | Annual | Annual (compound) | Annual (compound) |
| Early redemption fee | 0 PLN | 0.50 PLN | 0.70 PLN | 0.70 PLN | 1.00 PLN | 2.00 PLN | 2.00 PLN |
| Min. purchase | 100 PLN | 100 PLN | 100 PLN | 100 PLN | 100 PLN | 100 PLN | 100 PLN |
| Availability | Everyone | Everyone | Everyone | Everyone | 800+ only | 800+ only | Everyone |
*ROS and ROD are available exclusively to beneficiaries of the 800+ child benefit program (formerly 500+).
OTS — 3-Month Fixed-Rate Bonds
Best for: Emergency cash parking, waiting for better rates, very short-term goals.
How They Work
OTS bonds mature after exactly 3 months. The interest rate is fixed at purchase — currently around 3.00% annualized. At maturity, principal plus interest is returned automatically, or you can set up auto-renewal.
Real Return Calculation (April 2026)
- Nominal rate: 3.00% annualized (0.75% per quarter)
- After Belka tax (19%): 2.43% annualized
- With 4.5% inflation: real return of approximately -2.07%
When OTS Makes Sense
Some investors use OTS as a cash management tool rather than an investment. If you have 50,000 PLN earmarked for a home down payment in 6 months, OTS preserves slightly more value than a current account (typically 0–0.5%) while keeping full liquidity.
Drawback
OTS does not protect against inflation. Over any period longer than 6 months, historical data suggests that fixed-rate short bonds tend to erode purchasing power in environments where CPI exceeds 3%.
DOS — 2-Year Fixed-Rate Bonds
Best for: Medium-term parking with a known return, savers who want predictability.
How They Work
DOS pays a fixed rate (~3.30% in April 2026) with annual interest capitalization. After 2 years, you receive principal plus compounded interest.
Real Return Calculation
- Nominal rate: 3.30% annually
- After 2 years on 10,000 PLN: ~10,671 PLN gross, ~10,543 PLN after tax
- With 4.5% annual inflation: real return of approximately -1.20% per year
When DOS Makes Sense
DOS is historically preferred by conservative savers who want a guaranteed nominal return over a specific period. If you believe inflation will drop below 3% within your holding period, DOS could deliver a positive real return.
TOS — 3-Year Fixed-Rate Bonds
Best for: Savers with a 2–3 year horizon who prefer rate certainty over inflation indexation.
How They Work
TOS bonds pay a fixed annual rate (~3.30%) for 3 years. Interest is capitalized annually, meaning year 2 and year 3 earn interest on a slightly higher base.
Real Return Calculation
- Nominal rate: 3.30%
- After 3 years on 10,000 PLN: ~11,018 PLN gross, ~10,824 PLN after tax
- With 4.5% average inflation: real return of approximately -1.20% per year
Early Redemption
Early redemption costs 0.70 PLN per bond plus forfeiture of interest from the current period. On a 10,000 PLN position (100 bonds), that is 70 PLN — not catastrophic but worth considering.
COI — 4-Year Inflation-Linked Bonds
Best for: Medium-term inflation protection, saving for goals 3–5 years away.
How They Work
Year 1 pays a promotional fixed rate (~6.75% in April 2026). From year 2 onward, COI pays CPI inflation + 1.00% margin. Interest is paid annually (not capitalized into principal).
Real Return Calculation
Assuming 4.5% average CPI over 4 years:
| Year | Rate | Gross interest on 10,000 PLN |
|---|---|---|
| 1 | 6.75% (fixed) | 675 PLN |
| 2 | 4.5% + 1.0% = 5.50% | 550 PLN |
| 3 | 4.5% + 1.0% = 5.50% | 550 PLN |
| 4 | 4.5% + 1.0% = 5.50% | 550 PLN |
- Total gross interest: 2,325 PLN
- After 19% Belka tax: ~1,883 PLN
- Effective annual return after tax: ~4.71%
- Real return: ~+0.21% per year (approximately breakeven with inflation)
Why COI Over a Bank Deposit
As of April 2026, most Polish bank deposits offer 3.5–5.0% for 12-month terms. COI's advantage emerges if inflation rises — the rate adjusts upward automatically, while a bank deposit locks in the initial rate. Historical data from 2022-2023, when Polish CPI spiked to 18.4%, showed COI bondholders earning 19.4% in year 2, while bank deposits from mid-2021 were locked at 2–3%.
EDO — 10-Year Inflation-Linked Bonds (Compound Interest)
Best for: Long-term wealth preservation, retirement planning, children's education funds.
How They Work
Year 1 pays a fixed promotional rate (~6.80%). From year 2, EDO pays CPI + 1.00%. The critical difference from COI: interest is capitalized annually, meaning you earn compound interest on previous years' interest.
Real Return Calculation
Assuming 4.5% average CPI over 10 years:
| Year | Principal (start) | Rate | Interest |
|---|---|---|---|
| 1 | 10,000 | 6.80% | 680 |
| 2 | 10,680 | 5.50% | 587 |
| 3 | 11,267 | 5.50% | 620 |
| 4 | 11,887 | 5.50% | 654 |
| 5 | 12,541 | 5.50% | 690 |
| 6 | 13,231 | 5.50% | 728 |
| 7 | 13,959 | 5.50% | 768 |
| 8 | 14,727 | 5.50% | 810 |
| 9 | 15,537 | 5.50% | 854 |
| 10 | 16,391 | 5.50% | 902 |
- Final value: ~17,293 PLN gross
- After 19% Belka tax on 7,293 gain: ~15,907 PLN net
- Effective annual net return: ~4.76%
- Real return: ~+0.26% per year after inflation and tax
High Inflation Scenario (8% CPI)
If inflation averages 8% (as Poland experienced in 2022-2023):
- EDO rate from year 2: 9.00% (8% + 1%)
- 10,000 PLN after 10 years: ~24,180 PLN gross
- After tax: ~21,285 PLN net
- Real return: approximately +0.93% per year — comfortably positive
EDO vs COI — The Compounding Gap
Over 10 years, the difference between COI (simple interest paid out) and EDO (compound interest capitalized) is significant:
| Scenario | COI total return (10yr, rolling) | EDO total return (10yr) |
|---|---|---|
| 4.5% CPI | ~47% gross | ~73% gross |
| 8% CPI | ~83% gross | ~142% gross |
The compounding effect becomes more powerful as inflation rises and time extends.
ROS — 6-Year Family Bonds (800+ Only)
Best for: Families receiving the 800+ benefit who want better-than-EDO margins.
How They Work
ROS is available exclusively to beneficiaries of the 800+ child benefit. Year 1 pays ~6.80% fixed; from year 2, CPI + 1.25% (vs. EDO's 1.00% margin). Interest is capitalized annually.
Who Qualifies
Any parent or guardian receiving the 800+ child benefit (formerly 500+) can purchase ROS and ROD bonds. There is no limit tied to the benefit amount — you can invest any sum.
Return Comparison vs EDO
At 4.5% CPI over 6 years:
- ROS (CPI + 1.25%): ~13,890 PLN from 10,000 PLN
- EDO (CPI + 1.00%) after 6 years: ~13,670 PLN
The 0.25% higher margin compounds over time. For a family investing 50,000 PLN, that difference amounts to approximately 1,100 PLN over 6 years.
ROD — 12-Year Family Bonds (800+ Only)
ROD is the longest and highest-margin bond available in Poland: CPI + 1.50% with 12-year maturity and annual compounding. At 4.5% average inflation, 10,000 PLN could grow to approximately 20,600 PLN gross over 12 years. Some financial advisors consider ROD the single strongest inflation-protection instrument available to retail investors in Poland.
Tax Treatment — Belka Tax
All Polish treasury bonds are subject to the 19% capital gains tax (podatek Belki):
- OTS, DOS, TOS: Tax withheld at maturity or early redemption
- COI: Tax withheld on each annual interest payment
- EDO, ROS, ROD: Tax withheld at maturity on total accumulated interest
There is no way to hold treasury bonds in IKE or IKZE accounts to avoid Belka tax. This is a frequently misunderstood point — IKE/IKZE accounts are limited to stocks, ETFs, funds, and certain deposits.
Tax Optimization Tip
Since EDO/ROD tax is deferred until maturity (or early redemption), you effectively receive an interest-free tax loan from the government for up to 10–12 years. This deferral is itself worth approximately 0.15–0.20% per year in additional real return compared to instruments where tax is paid annually.
How to Buy Polish Treasury Bonds
Option 1: obligacjeskarbowe.pl (Primary Market)
- Create an account at obligacjeskarbowe.pl
- Verify identity (video call or PKO BP branch)
- Select bond type and amount (minimum 100 PLN)
- Pay via bank transfer
- Bonds appear in your account within 1–2 business days
Option 2: PKO BP Branch or PKO BP Online (iPKO)
PKO Bank Polski is the official distribution agent. You can purchase bonds:
- In any PKO BP branch
- Through iPKO online banking
- Through the IKO mobile app
Option 3: mBank, ING, and Other Banks
Several banks offer treasury bond purchases through their platforms. Availability varies — check with your bank. The bonds themselves are identical regardless of purchase channel.
Monthly Issuance Schedule
New bond series are issued on the first business day of each month. Rates for the new series are announced 2–3 days before issuance on obligacjeskarbowe.pl.
Bond Ladder Strategy for Polish Treasury Bonds
A bond ladder diversifies across maturities to balance liquidity with long-term returns. Here is a model allocation for a 100,000 PLN portfolio:
Conservative Ladder
| Allocation | Bond | Purpose |
|---|---|---|
| 15,000 PLN | OTS (3-month) | Emergency liquidity, renewed quarterly |
| 20,000 PLN | DOS (2-year) | Near-term goals |
| 25,000 PLN | COI (4-year) | Medium-term inflation protection |
| 40,000 PLN | EDO (10-year) | Long-term core holding |
Aggressive Inflation-Protection Ladder
| Allocation | Bond | Purpose |
|---|---|---|
| 10,000 PLN | OTS (3-month) | Minimal liquidity reserve |
| 30,000 PLN | COI (4-year) | Medium-term goals |
| 60,000 PLN | EDO (10-year) | Maximum compounding |
Family Ladder (800+ Eligible)
| Allocation | Bond | Purpose |
|---|---|---|
| 10,000 PLN | OTS (3-month) | Liquidity |
| 20,000 PLN | COI (4-year) | Medium-term |
| 30,000 PLN | ROS (6-year) | Higher margin |
| 40,000 PLN | EDO (10-year) | Long-term compounding |
Early Redemption — What You Actually Lose
Early redemption is possible for all bond types after a minimum holding period (typically the first month). The costs:
| Bond | Fee per bond | Interest forfeited | Effective cost on 10,000 PLN |
|---|---|---|---|
| OTS | 0 PLN | None (matures in 3 months) | 0 PLN |
| DOS | 0.50 PLN | Current period | ~50 PLN + lost interest |
| TOS | 0.70 PLN | Current period | ~70 PLN + lost interest |
| COI | 0.70 PLN | Current period | ~70 PLN + lost interest |
| ROS | 1.00 PLN | Current period | ~100 PLN + lost interest |
| EDO | 2.00 PLN | Current period | ~200 PLN + lost interest |
| ROD | 2.00 PLN | Current period | ~200 PLN + lost interest |
Rule of thumb: If you might need the money within 2 years, some investors prefer COI over EDO — the lower redemption fee (0.70 vs 2.00 PLN per bond) reduces the penalty if plans change.
Common Mistakes When Buying Polish Bonds
- Buying only OTS/DOS — fixed-rate bonds lose purchasing power when inflation exceeds the coupon. Historical data from 2022-2023 showed OTS holders losing 10–15% in real terms.
- Ignoring the compounding difference — COI pays interest out; EDO capitalizes it. Over 10 years, this gap historically has exceeded 25 percentage points.
- Not checking 800+ eligibility — ROS and ROD offer 0.25–0.50% higher margins. Families leaving money in EDO instead of ROS/ROD are giving up free return.
- Buying at the wrong time — rates reset monthly. If inflation is expected to rise, buying COI/EDO early locks in the promotional first-year rate while future years benefit from higher CPI.
- Comparing nominal rates across types — a 3.30% TOS is not comparable to a 6.80% EDO year-1 rate. Always compare expected total return over your actual holding period.
FAQ
Can foreigners buy Polish treasury bonds?
Yes. Any person with a Polish PESEL number and a Polish bank account can purchase treasury bonds at obligacjeskarbowe.pl. EU citizens can obtain a PESEL at any municipal office (urzad gminy). Non-EU residents need a residence permit.
What happens to my bonds if obligacjeskarbowe.pl goes down?
Your bonds are registered in the central securities depository (KDPW). The website is just an interface — your ownership is recorded independently. Even if PKO BP had financial difficulties, your bonds would remain government obligations.
Can I gift or transfer bonds to another person?
Yes, but only through inheritance or a court order. Treasury bonds are not transferable between living individuals through the standard platform. Some investors consider this a limitation for estate planning.
How do treasury bonds compare to ETFs on GPW?
Treasury bonds offer guaranteed nominal returns with inflation protection. ETFs (such as those tracking WIG20 or S&P 500) offer potentially higher returns but with market risk. Historical data suggests that over 10-year periods, global equity ETFs have outperformed EDO bonds approximately 70% of the time, but with significantly higher volatility. Some investors allocate bonds as the "safe" portion and ETFs as the "growth" portion.
What is the maximum amount I can invest in treasury bonds?
There is no upper limit for standard bonds (OTS, DOS, TOS, COI, EDO). You can invest millions of PLN if desired. ROS and ROD are limited to 800+ beneficiaries but have no per-person cap.
Are Polish treasury bonds safe if Poland's credit rating drops?
Poland currently holds an A- rating from S&P and A2 from Moody's — investment grade. Treasury bonds are considered one of the safest PLN-denominated instruments. A rating downgrade would not affect existing bond terms, though it could influence future issuance rates.
Can I hold bonds in IKE or IKZE?
No. Polish treasury bonds purchased through obligacjeskarbowe.pl cannot be held in IKE or IKZE accounts. The 19% Belka tax applies to all treasury bond interest without exception.
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