mBank vs ING Savings Account — Which Polish Bank Offers Better Rates in 2026?

mBank vs ING — the Battle for the Best Savings Account

mBank and ING are the two leading digital banks in Poland, both offering competitive savings accounts with promotional interest rates. In 2026, the two banks are aggressively courting customers — mBank with its eKonto Oszczędnościowe (5.5%) and ING with Konto z Lwem (5.2%).

Freenance regularly compares both banks' offers and notes that the interest rate difference is just the tip of the iceberg — what really matters are the conditions, limitations, and long-term strategy behind each offer.

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Quick Comparison — Decision Table

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Detailed Offer Analysis (February 2026)

mBank eKonto Oszczędnościowe

Promotional terms:

• Interest rate: 5.5% per annum
• Promotional period: 4 months from activation
• Promotional cap: 100,000 PLN
• Requirements: Hold an eKonto + minimum 2,000 PLN monthly inflow
• Eligible: New and existing customers (from November 2025)

After the promo:

• Standard rate: 2.0% per annum
• Compounding: Monthly
• Fees: 0 PLN with an active eKonto

ING Konto z Lwem — Savings Component

Promotional terms:

• Interest rate: 5.2% per annum
• Promotional period: 12 months from activation
• Promotional cap: 50,000 PLN
• Requirements: Hold a Konto z Lwem + 1 transaction per month
• Eligible: New customers (from January 2026)

After the promo:

• Standard rate: 1.0% per annum
• Compounding: Monthly
• Fees: 0 PLN when conditions are met

Activation Requirements — What You Need to Qualify

mBank — Promotional Requirements

Required products:

• eKonto: Free with 2,000 PLN monthly inflow
• Activity: Minimum 2,000 PLN monthly inflow to main account
• Timing: Activate promotion within 30 days of opening the account

Additional conditions:

• Funds must be "new" (not held at mBank in the previous 6 months)
• No option to extend the promotion after 4 months
• One-time use only

ING — Konto z Lwem Requirements

Required products:

• Konto z Lwem: Free with 1 transaction per month (BLIK, card, or transfer)
• Activity: Minimum 1 transaction per month (very easy to meet)
• Timing: Promotion activates automatically when the account is opened

Additional conditions:

• Promotion available only to new ING customers
• Funds can be withdrawn at any time
• No "new funds" definition — you can transfer from another bank

Calculations — How Much Will You Earn at Each Bank?

Scenario 1: Maximum Amount at mBank (100,000 PLN)

4 months promotional rate (5.5%):

• Gross interest: 100,000 × 5.5% × (4/12) = 1,833 PLN
• Belka tax (19%): 348 PLN
• Net interest: 1,485 PLN

8 months post-promo (2.0%):

• Gross interest: 100,000 × 2.0% × (8/12) = 1,333 PLN
• Belka tax (19%): 253 PLN
• Net interest: 1,080 PLN

Total for the year: 2,565 PLN net

Scenario 2: Maximum Amount at ING (50,000 PLN)

12 months promotional rate (5.2%):

• Gross interest: 50,000 × 5.2% = 2,600 PLN
• Belka tax (19%): 494 PLN
• Net interest: 2,106 PLN

Total for the year: 2,106 PLN net

Scenario 3: Hybrid Strategy (150,000 PLN)

Optimal allocation:

• 100,000 PLN at mBank (maximum promotional cap)
• 50,000 PLN at ING (maximum promotional cap)

Combined net interest for the year: 4,671 PLN

Average return: 3.11% net per annum

Detailed Cost and Fee Analysis

mBank — Cost Structure

eKonto (required for savings promotion):

• Maintenance: 0 PLN with 2,000 PLN monthly inflow
• Debit card: 0 PLN with active usage
• Online transfers: Free (unlimited)
• ATM withdrawals: 4 free per month, then 5 PLN each

Savings account:

• Maintenance: 0 PLN when holding an eKonto
• Internal transfers: Free
• Withdrawals: No restrictions or fees

ING — Cost Structure

Konto z Lwem (required for the promotion):

• Maintenance: 0 PLN with 1 transaction per month
• Debit card: Always 0 PLN
• Online transfers: Free (unlimited)
• ATM withdrawals: 5 free per month in Poland, then 6 PLN each

Savings component:

• Maintenance: 0 PLN when holding a Konto z Lwem
• Transfers: Free between own accounts
• Withdrawals: No time restrictions

Mobile App Comparison

mBank Mobile — Savings Features

✅ Pros:

• Clear balance display and interest history
• Instant transfers between accounts
• Push notifications for accrued interest
• Integration with budgeting and financial planning

❌ Cons:

• Occasional app performance issues
• Complex interface for beginners
• No dedicated savings goals section

ING Mobile — Savings Features

✅ Pros:

• One of the best banking apps in Poland
• Intuitive account and goal breakdown
• Excellent notifications and spending controls
• "Skarbonka" (Piggy Bank) — automatic micro-savings

❌ Cons:

• Limited long-term analysis tools
• No advanced savings calculators
• Some features only available via browser

Security and Guarantees

mBank — Security

Deposit guarantees:

• BFG (Polish Deposit Guarantee Fund): Up to 100,000 EUR per person (~430,000 PLN)
• Credit rating: A- (S&P), stable outlook
• Parent company: Commerzbank (Germany) — established banking group

Technical security:

• Two-factor authentication (SMS/app)
• Biometric login in the mobile app
• 24/7 transaction monitoring

ING — Security

Deposit guarantees:

• BFG: Up to 100,000 EUR per person
• Credit rating: A+ (S&P), stable outlook
• Parent company: ING Groep (Netherlands) — one of the largest European banks

Technical security:

• Mobile token in the app
• Push notifications for every transaction
• One-tap card blocking

Long-Term Analysis — What Happens After the Promo?

mBank — Strategy After 4 Months

Options after the promotional period ends:

1. Stay at 2.0% — still competitive in the market
2. Move to ING — if a new-customer promotion is available
3. Hunt for a new promo — Santander, Alior, other banks
4. Switch to government bonds — 5.75–6.25% with no bank risk

ING — Strategy After 12 Months

Options after the promotional period ends:

1. Stay at 1.0% — not attractive long-term
2. Move to a competitor — chase the next promotion
3. Use other ING products — term deposits, funds, investments
4. Hybrid strategy — split between ING and new promotions

Freenance Recommends: Optimization Strategy

🎯 For Savers with Up to 50,000 PLN

Recommendation: ING Konto z Lwem

• Longer promotional period (12 vs 4 months)
• Simpler activation requirements
• Better mobile app
• Stability for the entire year

🎯 For Savers with 50,000–150,000 PLN

Recommendation: Hybrid Strategy

• 50,000 PLN at ING (maximize the 12-month promotion)
• 100,000 PLN at mBank (higher rate for 4 months)
• After 4 months, move mBank funds to the best available offer

🎯 For Savers with Over 150,000 PLN

Recommendation: Diversify

• Max out promotional caps at both banks
• Place the rest in Santander (6.5%), Nest Bank (5.8%), or government bonds
• Review new promotions quarterly

Practical Tips — How to Rotate Between Promotions

Timeline for the Hybrid Strategy

Month 1 (March 2026):

• Open accounts at both banks
• Transfer funds according to promotional caps
• Set reminders for mBank promo end date (June)

Month 4 (June 2026):

• Assess the current savings promotion landscape
• Move mBank funds to the best available option
• Keep ING running until the 12-month promo ends

Month 12 (March 2027):

• Evaluate new offers on the market
• Decide whether to move ING funds
• Plan your strategy for the next year

Tracking Tools

Financial calendar:

• Reminders for promotion end dates
• Monitor new bank offers
• Track changes in terms and conditions

Comparison spreadsheet:

• Current interest rates across all banks
• After-tax return calculations
• History of your decisions and their outcomes

Alternatives Worth Considering

Other Competitive Offers (February 2026)

Santander savings account:

• 6.5% for 4 months on up to 100,000 PLN
• Higher rate than both mBank and ING
• Requires a personal account with 2,000 PLN monthly inflow

Nest Bank:

• 5.8% for 6 months on up to 200,000 PLN
• Longer promo than mBank, higher cap than ING
• Requires a 360° account with 3,000 PLN monthly inflow

Government bonds:

• EDO: 5.75% for one year
• TOS: 6.0% for two years
• No amount limits, full state guarantee

Summary — Final Recommendations

For most savers, the best strategy is a combination of both banks, maximizing promotional benefits while spreading risk.

Freenance recommends:

🥇 First Place: Hybrid Strategy (ING + mBank)

• Maximize promotional rates
• Spread risk across two stable banks
• Combined interest of ~4,600 PLN net per year on 150,000 PLN

🥈 Second Place: ING Only (for simplicity)

• One bank, one promotion for the whole year
• Excellent mobile app
• No need to shuffle funds around

🥉 Third Place: mBank Only (for rate maximizers)

• Highest promotional interest rate (5.5%)
• Highest cap (100,000 PLN)
• Requires active management after 4 months

Important notes:

• Promotions may change — monitor offers regularly
• Remember the Belka tax (19%) on interest income
• Don't keep all your savings in a single bank

Final comparison scores:

• mBank: ⭐⭐⭐⭐ (4/5) — high promo rate, but short-lived
• ING: ⭐⭐⭐⭐⭐ (5/5) — best balance of duration and returns

There's no clear-cut winner — success depends on your financial situation and willingness to actively manage savings account promotions.

March 2026 Rate Updates — Latest Changes

Since our February analysis, both banks have adjusted their offerings. Here are the current terms as of March 16, 2026:

mBank eKonto Oszczędnościowe — March Updates

NEW Promotional terms (effective March 1, 2026):

• Interest rate: 5.8% per annum (increased from 5.5%)
• Promotional period: 6 months (extended from 4 months)
• Promotional cap: 150,000 PLN (increased from 100,000 PLN)
• Requirements: eKonto + 1,500 PLN monthly inflow (reduced from 2,000 PLN)
• Eligible: New and existing customers (extended promotion)

Post-promo changes:

• Standard rate: 2.2% per annum (up from 2.0%)
• No changes to fees or accessibility

ING Konto z Lwem — March Adjustments

Updated promotional terms:

• Interest rate: 5.0% per annum (reduced from 5.2%)
• Promotional period: 12 months (unchanged)
• Promotional cap: 75,000 PLN (increased from 50,000 PLN)
• Requirements: Konto z Lwem + 1 transaction per month (unchanged)
• Eligible: New customers only

Post-promo changes:

• Standard rate: 1.2% per annum (up from 1.0%)

Recalculated March 2026 Returns

Scenario 1: Maximum at mBank (150,000 PLN)

• 6 months promo (5.8%): Net interest = 3,520 PLN
• 6 months standard (2.2%): Net interest = 1,335 PLN
• Annual total: 4,855 PLN net

Scenario 2: Maximum at ING (75,000 PLN)

• 12 months promo (5.0%): Net interest = 3,037 PLN
• Annual total: 3,037 PLN net

Scenario 3: Optimal hybrid (225,000 PLN)

• 150,000 PLN at mBank + 75,000 PLN at ING
• Combined annual total: 7,892 PLN net
• Effective rate: 3.51% per annum after tax

Detailed Conditions for Promotional Rates

mBank Requirements — Comprehensive Breakdown

eKonto activation:

1. Account opening: Must be done online or in branch
2. Initial deposit: Minimum 100 PLN (can be immediately transferred)
3. Monthly inflow requirement: 1,500 PLN from external source
4. Qualifying inflows: Salary, pension, benefits, transfers from other banks
5. Non-qualifying inflows: Internal mBank transfers, cash deposits, loan proceeds

Savings account activation:

1. Timing: Must activate within 60 days of eKonto opening
2. Minimum balance: No minimum required for promo activation
3. Fund source: "New funds" - not held at mBank in previous 6 months
4. Maximum delay: Promo starts from first deposit, not account opening

Maintaining eligibility:

• Monthly eKonto inflow must continue throughout promo period
• If inflow stops, savings account reverts to standard rate immediately
• Promo cannot be reactivated if conditions are resumed

ING Requirements — Step-by-Step Guide

Konto z Lwem setup:

1. Eligibility check: Must not have held ING account in previous 12 months
2. Account opening: Online process takes 5-10 minutes
3. Identity verification: Video call or branch visit required
4. Initial deposit: No minimum, but recommend 100 PLN for testing

Monthly activity requirement:

• Qualifying transactions: Card payment, BLIK, online transfer, direct debit
• Minimum amount: Any amount counts (even 1 PLN BLIK)
• Timing: Must occur within each calendar month
• Grace period: One month grace if requirement missed

Savings component activation:

• Automatically available once Konto z Lwem is active
• No separate application required
• Interest starts accruing immediately upon deposit
• No "new funds" restriction

Deep-Dive Mobile App Comparison

mBank App — Detailed Feature Analysis

Savings Management Features:

• Interest tracking: Real-time display of daily interest accrual
• Goal setting: Create savings targets with progress visualization
• Automatic transfers: Schedule recurring transfers to savings
• Rate alerts: Notifications when promotional rates change
• History: 12-month interest earnings breakdown

Advanced Tools:

• Spending analysis: Categorized expense tracking
• Budget integration: Connect savings goals with spending budgets
• Investment bridge: Easy transfer to mBank mutual funds or ETFs
• Tax reporting: Annual interest summary for tax declaration

User Experience:

• Navigation: 7/10 - Feature-rich but complex for beginners
• Performance: 8/10 - Fast loading, occasional glitches during peak hours
• Design: 7/10 - Professional but not as intuitive as competitors
• Offline features: Limited offline functionality

ING App — Comprehensive Review

Savings Management Features:

• "Skarbonka" auto-saving: Round up purchases to nearest złoty, save difference
• Visual goals: Photo-based savings targets (vacation, car, home)
• Transfer scheduling: Flexible recurring and one-time transfer options
• Interest calculator: Built-in tool for projecting earnings
• Multiple sub-goals: Separate "pots" within the main savings account

Unique ING Features:

• Spending insights: AI-powered categorization and spending predictions
• Payment planning: Timeline view of upcoming bills and obligations
• "Pulpit finansowy": Dashboard showing complete financial picture
• Integration: Seamless connection with ING investment and insurance products

User Experience:

• Navigation: 9/10 - Consistently rated best banking app in Poland
• Performance: 9/10 - Excellent stability and speed
• Design: 9/10 - Clean, intuitive interface
• Accessibility: Full support for vision/hearing impaired users

Feature-by-Feature App Comparison

Overall app rating: ING wins 6-2 for general banking; mBank stronger for investment-focused users.

Which Bank for Which User Profile — Detailed Recommendations

Profile 1: Young Professional (23-30 years old)

Typical situation:

• First stable job, building emergency fund
• Monthly savings: 1,000-3,000 PLN
• Values: Simplicity, good mobile experience, growth potential

🏆 Recommendation: ING Konto z Lwem

Why ING wins:

• Superior mobile app for daily banking
• Low-maintenance requirements (1 transaction/month)
• Auto-saving features help build habits
• Strong foundation for future financial products

Setup strategy:

• Start with 25,000-50,000 PLN to test the system
• Use "Skarbonka" round-up feature to boost savings
• Graduate to investment products once emergency fund complete

Profile 2: Established Professional (30-45 years old)

Typical situation:

• Higher income, optimizing returns on substantial savings
• Monthly savings: 3,000-8,000 PLN
• Values: Maximum returns, financial sophistication, tax optimization

🏆 Recommendation: mBank + Hybrid Strategy

Why mBank wins:

• Higher promotional rates for larger amounts
• Better integration with investment products
• More sophisticated financial planning tools
• Professional investment advisory services available

Setup strategy:

• Max out mBank promotional cap (150,000 PLN)
• Use remaining funds across ING and other promotional offers
• Transition post-promo funds to mBank mutual funds or ETFs

Profile 3: Pre-Retirement (50-65 years old)

Typical situation:

• Substantial savings, conservative approach
• Monthly additions: 2,000-5,000 PLN
• Values: Security, stability, predictable returns

🏆 Recommendation: ING (Primary) + Government Bonds

Why this combination:

• ING's 12-month stability reduces need for active management
• Government bonds provide guaranteed returns above promotional rates
• Lower risk than chasing multiple bank promotions
• Simpler tax reporting and management

Setup strategy:

• Place 75,000 PLN at ING for promotional rate
• Invest additional funds in 2-year Treasury bonds (TOS)
• Minimize account switching and promotion hunting

Profile 4: Small Business Owner / Freelancer

Typical situation:

• Irregular income, needs flexible access
• Business and personal savings mixed
• Values: Cash flow management, minimal fees, integration

🏆 Recommendation: mBank (Business focus)

Why mBank wins:

• Better integration between personal and business banking
• More flexible inflow requirements (reduced to 1,500 PLN)
• Advanced financial management tools
• Professional advisory services for business growth

Setup strategy:

• Use business account for regular operations
• Channel personal savings through promotional account
• Leverage mBank's investment platform for business surplus funds

Profile 5: Conservative Family Saver

Typical situation:

• Saving for children's education, family goals
• Monthly savings: 1,500-4,000 PLN
• Values: Safety, simplicity, family-friendly features

🏆 Recommendation: ING (Family focus)

Why ING wins:

• Excellent family budgeting and goal-setting features
• Photo-based savings goals motivate children to understand money
• Superior customer service for family-related questions
• Lower complexity reduces financial stress

Setup strategy:

• Set up visual savings goals for each child
• Use family photo goals (vacation, education, home improvements)
• Teach children about money using ING's educational app features

Advanced Optimization Strategies for Power Users

Strategy 1: Promotion Chain Management

Concept: Systematically rotate funds between promotional offers to maintain above-market rates year-round.

Implementation:

1. Q1: mBank (6 months promo) + ING (12 months)
2. Q3: Move mBank funds to Santander (4 months) + keep ING
3. Q4: Scout for new offers, plan Q1 of following year
4. Repeat: Continuous optimization cycle

Requirements:

• Minimum 100,000 PLN to make switching worthwhile
• Time investment: 2-3 hours quarterly
• Spreadsheet tracking system
• Alert system for new promotions

Strategy 2: Tax Optimization Through Timing

Concept: Manage interest income across tax years to optimize total tax burden.

Implementation:

• High income years: Minimize interest by timing withdrawals before year-end
• Lower income years: Maximize interest income when in lower tax brackets
• Business owners: Coordinate with business income fluctuations
• Retirees: Plan around pension tax thresholds

Strategy 3: Interest Rate Hedging

Concept: Protect against rate changes by diversifying across different promotion periods.

Implementation:

• Short-term promotions (mBank): 40% allocation
• Medium-term promotions (ING): 30% allocation
• Long-term bonds: 20% allocation
• Liquid cash: 10% allocation

Benefits:

• Protection against falling promotional rates
• Guaranteed income from bond portion
• Flexibility to capitalize on new opportunities

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💰 Optimize your savings strategy with Freenance. Track interest earnings across multiple banks, set automatic alerts for promotion expiry dates, and monitor your total return against inflation. See which promotional strategies are actually working for your money. Start maximizing your savings returns →