Best App for Multi-Currency Net Worth 2026 — EU

TL;DR

Net worth tracking gets a lot harder the moment your assets span multiple currencies. A €280,000 net worth that breaks down as €120,000 PLN-denominated (apartment, Polish savings, IKE/IKZE), €90,000 EUR-denominated (Trade Republic ETFs, German bank), €55,000 USD-denominated (Interactive Brokers stocks, US bank from a job abroad), and €15,000 GBP-denominated (UK pension from a 2-year contract) cannot be tracked correctly in a single-currency app. Worse, FX moves can swing your apparent net worth by €10,000+ in a quiet quarter, masking or exaggerating your actual progress. Data shows Kubera is the top pick for multi-currency net worth in 2026 (~$15/month, ~€14, supports 20+ currencies natively, tracks both spot value and FX gain/loss separately, handles illiquid assets like real estate and crypto and angel investments). The runner-up is Sharesight ($19-50/month, ~€17-45), the strongest pick if your wealth is mostly in equities and you want sophisticated multi-currency dividend and capital-gain reporting per jurisdiction. Monarch Money (€14.99/month) is the third pick when you also want a budgeting layer integrated. Snowball Analytics (€9.99/month) is the value pick for investment-heavy portfolios. Freenance is being built as an EU-native net-worth + cash-flow dashboard with EUR/PLN dual-primary support — see soft mention later. Winning use case: a 38-year-old who has worked in three countries, holds assets in four currencies, and wants a single dashboard showing both "what is my wealth in EUR today" and "what would it be if I converted everything to EUR right now after taxes." Key tip: pick an app that separates "spot value at today's FX" from "cost basis at historical FX" — the difference is your unrealized FX gain or loss and is taxable as a separate gain in many EU jurisdictions including Poland.

App features change frequently. Test free tier before committing to paid plan.

Why Multi-Currency Net Worth Tracking Is Hard

The naïve approach — convert everything to your home currency at today's FX rate and sum it up — is wrong in two ways that matter for both decision-making and tax compliance.

First, FX moves are not value creation or destruction. If your €90,000 of EUR-denominated ETFs gained 12% in EUR terms but EUR weakened 5% vs PLN, a PLN-reporting tracker shows you up 7% — but you are actually up 12% in the right unit (the one you bought the ETF in). Mixing real returns with FX moves obscures what your investment strategy actually did. Sophisticated trackers separate the two: "investment return: +12% EUR" and "FX impact: -5% PLN/EUR" with the combined PLN view as a third number, not the only number.

Second, FX gains and losses are often taxable as a separate category. In Poland, FX gains on foreign-currency accounts and on the conversion leg of foreign-asset sales are taxed under PIT, often at the 19% Belka rate for capital gains. If your tracker only shows you the net combined return, you cannot file accurately. You need historical cost basis at the FX rate on the purchase day, separated from current value.

Third, illiquid assets in foreign currencies (a Berlin apartment, a UK pension, restricted stock units from a US employer) have neither a daily spot price nor a clean way to determine current FX value. The best apps let you specify a valuation method per asset: market quote, custom monthly mark, or appraisal value at a stated FX rate.

Fourth, the cross-currency rebalancing problem. If you target a 60/30/10 split across stocks/bonds/cash, FX moves alone can push you out of balance without any trades. A multi-currency net worth app should show your allocation both in home-currency terms and in "as if I converted nothing" terms so you can distinguish allocation drift from FX drift.

Fifth, the consolidation problem: tax forms in Poland (PIT-38 for capital gains, PIT-ZG for foreign income) demand specific currency conversion methodology (NBP average rate from the day preceding the transaction). A tracker that uses different FX sources or interpolates rates incorrectly will produce numbers that disagree with your filed tax return.

Top 5 Apps Comparison Table — Multi-Currency Net Worth

Honorable mentions: Personal Capital / Empower (US-only but historically strong), Money Lover (mobile-first, simpler multi-currency), and self-hosted alternatives like Firefly III (free, technically demanding, full multi-currency support). For pure investment tracking, Portfolio Performance (free desktop, German-built, the analytical favorite of DACH FIRE community) deserves a mention even though it lacks bank account net-worth aggregation.

Top Pick Deep-Dive: Kubera

Kubera wins because it was built ground-up for the cross-border wealth tracking problem. The data model has currency as a first-class property of every account, every holding, and every transaction. You can hold accounts in EUR, PLN, USD, GBP, CHF, SGD, and many more simultaneously, and the dashboard shows both your reporting-currency total and per-currency totals. Each asset's cost basis is recorded in its native currency, with FX-converted home-currency value as a derived field. The "FX gain/loss since acquisition" report is a built-in feature, which is rare.

Kubera also handles asset classes that most apps refuse to: real estate (with appraisal value or Zillow / IndexValue API), private equity / angel investments (manual valuation rounds), crypto (across 100+ exchanges and wallets), insurance cash value, even physical collectibles. For a globally-positioned wealth holder, this completeness eliminates the need for a separate spreadsheet for "off-book" assets.

Pricing at ~$15/month (about €14) is on the higher side but justifiable if your tracked net worth exceeds €100,000. The 14-day trial is the only way to test without commitment. The web-first interface is functional rather than beautiful — Kubera caters to the substance-over-style FIRE community rather than the consumer market.

The killer feature for many EU users: the "Beneficiary" mode lets you designate someone (spouse, executor) who automatically gets full read-only access to your Kubera if you do not log in for a set period. This is the only mainstream net-worth app that takes estate planning seriously, and it removes the "if I die my partner cannot find my assets" risk that growing wealth complexity creates.

Runner-Up Deep-Dive: Sharesight

Sharesight at €17-45/month is the runner-up for users whose wealth is concentrated in liquid investments (stocks, ETFs, funds) rather than balanced across asset classes. Sharesight is the best-in-class multi-currency portfolio tracker for equities specifically: it imports trade history from 200+ brokers, applies the correct historical FX rate for cost basis, calculates true total return (price appreciation + dividends + FX impact, separated), and produces jurisdiction-specific tax reports for AU, NZ, UK, US, CA, and others.

The European-specific weakness: no native PIT report for Poland, Germany, or France as of 2026. Sharesight users in EU jurisdictions typically use the CGT (capital gains) export plus the dividend report and adapt for their local filing. The free tier (10 holdings, 1 portfolio) is enough to test the workflow; serious use needs the Investor tier (€17/month, 30 holdings) or Expert tier (€31/month, unlimited).

Choose Sharesight if your wealth is 70%+ in market-traded instruments and you want sophisticated tax-adjusted performance attribution. Choose Kubera if your wealth is mixed across real estate, private investments, crypto, and accounts plus markets — Kubera handles the breadth, Sharesight handles the depth.

Common Pitfalls for Multi-Currency Net Worth Apps

The most expensive pitfall: using an app that converts everything to home currency at today's FX and stops there. You lose the ability to distinguish FX impact from investment performance and you cannot file FX-gain taxes correctly. Always verify the app stores native-currency cost basis.

Second pitfall: inconsistent FX sources across apps and across time. If your tax filing uses NBP average rate (Polish requirement) but your tracker uses interbank mid-rate or a different provider, your numbers will disagree with your tax return. Some apps let you pick the FX source — use the one your tax authority requires.

Third pitfall: ignoring FX on income (dividends, interest, RSU vesting in foreign currency). Each event creates a tax obligation valued at the FX rate on the event date. Apps that record only the home-currency-equivalent at receipt date — and ignore later FX moves — make ongoing FX gain/loss invisible.

Fourth pitfall: real estate marked at purchase price forever. A flat in Warsaw bought for 480,000 PLN in 2014 is not still worth 480,000 PLN in 2026. Apps that don't prompt for periodic appraisal updates leave a major asset stale. Kubera, Monarch, and good spreadsheets all support custom valuation cadence.

Fifth pitfall: forgetting non-account wealth — pension (ZUS account, IKE, IKZE, OFE residuals, foreign pension entitlements), employer equity (vested RSUs, options, ESPP), and insurance cash value. These can easily be €50,000+ in total but are invisible if you only track bank and brokerage accounts.

Sixth pitfall: double-counting due to joint accounts. A €40,000 joint account with a spouse becomes €80,000 of "net worth" if both partners' trackers count the full balance. Apps that support % ownership per account are the right tool; manual workarounds work but require discipline.

DIY Alternative: The Multi-Currency Net Worth Spreadsheet

For users comfortable with spreadsheets and willing to refresh monthly, a Google Sheets template using GOOGLEFINANCE() for FX rates and equity prices is fully competitive with paid apps. The minimum viable template: one row per asset with columns for asset name, currency, native amount, cost basis native, current price (live-linked for liquid assets, manual for illiquid), home-currency value (calculated), FX gain/loss (calculated), and a tag for asset class.

The template's main weakness is monthly refresh discipline — if you do not update real estate appraisal and illiquid valuations every 3-6 months, the spreadsheet becomes stale and misleading. The main strength is total transparency: you can audit every number and adjust for any tax-jurisdiction quirk.

Break-even point for paying an app: typically around €100,000 net worth and/or 4+ currencies and/or 10+ asset accounts. Below that, a free spreadsheet is hard to beat.

Multi-App Stack: The Global Citizen Setup

A 2026 stack for someone living in EU with assets across multiple countries: Kubera as the master net-worth dashboard (€14/month), Sharesight for sophisticated investment performance and dividend tax reports (€17/month), a budgeting app of choice (Lunch Money or YNAB) for the cash-flow layer, and a country-specific tax tool at year-end (e.g., e-PIT Polish online tax submission). Total monthly cost: ~€32-42 plus a one-time annual tax-prep cost.

This stack is overkill for someone with €30,000 net worth in one currency but appropriate for €250,000+ across 3+ currencies. The marginal cost of correct multi-currency tracking is roughly 0.15-0.2% of net worth annually at this scale, which is small relative to the FX-related tax errors that a single-currency tracker would cause.

Freenance is being designed to consolidate this stack for EU users: a single dashboard with EUR and PLN dual-primary support, native USD/GBP/CHF coverage for foreign-asset holders, FX gain/loss tracked separately from investment return, and a Polish-tax-aware reporting layer. The vision is one EU-native app instead of stacking three US-first tools.

Polish Reader Angle: Multi-Currency Holders Under Polish Tax Law

A Polish tax resident with foreign assets faces specific reporting requirements that affect multi-currency tracking.

ORD-U (foreign income tax form) for foreign-source income above thresholds. Requires conversion of foreign income to PLN at NBP average rate from the day preceding the payment.

PIT-ZG: declaration of foreign income for tax credit / exemption depending on treaty.

PIT-38: capital gains, including from foreign-domiciled brokers (Interactive Brokers, Trading 212, Trade Republic). Each transaction must be PLN-converted at NBP rate from the day preceding the trade. Apps that use a different FX source will produce numbers that disagree with what you must file.

Belka tax (19% capital gains) applies to gains on foreign accounts and securities including unrealized FX gain on closing of a foreign-currency account in some circumstances.

IKE / IKZE annual limits (~26,019 PLN IKE and ~10,407 PLN IKZE for 2026, subject to update) are tracked in PLN regardless of the underlying instrument currency. An app that displays your IKE in EUR equivalent without flagging the PLN limit usage will mislead you.

PSD2 bank coverage in 2026 spans PKO BP, mBank, Pekao, ING Bank Śląski, and Santander Bank Polska reliably; Revolut and Wise multi-currency accounts also support PSD2 in EU. Smaller banks have variable coverage. For brokerages, most major EU brokers (Trade Republic, Trading 212, Scalable Capital, Interactive Brokers) support automated import via CSV or broker-specific connectors in Sharesight and Kubera; PKO Brokerage, mBank Brokers, and BOSSA are typically manual.

For currency, the realistic Polish-resident-with-foreign-assets stack is PLN primary (operating account, taxes, daily life), EUR secondary (often Revolut or Wise, plus an EU broker), and USD tertiary (a US-employer RSU plan, an IBKR account, or a foreign-bank account from a past job).

EU Privacy and GDPR

Net-worth aggregator apps hold what is arguably the most sensitive financial data: total wealth, location of accounts, and asset composition. Where this data lives is a serious question. Kubera hosts in the US (AWS) with documented EU DPA but no EU-region option as of 2026. Sharesight hosts in Australia/AWS multiple regions with EU customer data optionally in EU region. Monarch hosts in the US. Snowball Analytics hosts in EU (Estonia). Freenance is EU-native by design.

For high-net-worth users, the practical advice is: enable 2FA without exception, do not connect every account (some users prefer Kubera knows about brokerage and savings but not the operating checking account that has full debit-card access), export full data quarterly to a local encrypted backup, and set up the beneficiary / executor feature so a spouse or estate can access if needed.

GDPR right-to-export is supported by all four major options.

Worked Example: Eva, EU Tax Resident with Four-Currency Portfolio

Eva is 38, Polish citizen, EU tax-resident in Poland. She worked in Germany for 3 years (2017-2020) and Ireland for 18 months (2020-2022) before returning to Warsaw. Her net worth in 2026: a Warsaw apartment (810,000 PLN current appraisal), Polish savings (94,000 PLN across IKE and a current account), German bank residual (€18,500 at N26), Trade Republic ETF portfolio (€72,000 mostly VWCE), Irish pension entitlement (€21,000 transferred-value estimate), US Interactive Brokers account from a side-consulting gig ($34,000), and Bitcoin (€11,500 current value at €43,000/BTC equivalent). Total in PLN: roughly 1,420,000 PLN at current FX.

Her app stack: Kubera for the consolidated net-worth view (€14/month), Sharesight Investor tier for the equity / ETF performance and dividend tax reports (€17/month), Toshl on phone for daily expenses in EUR/PLN (~€3/month), and a quarterly spreadsheet review for the Irish pension and Bitcoin custodial valuations. Total monthly cost: ~€34.

Her workflow: Kubera auto-syncs N26 and most accounts via Plaid; PKO BP and IKE-providing broker are manual monthly updates from statements. Sharesight imports Trade Republic and IBKR via CSV. Each quarter she does a 90-minute deep review: updates the apartment appraisal (uses sale-comparable from major Polish real estate sites for a custom mark), refreshes the Irish pension estimate, exports tax reports to share with her Polish accountant for the year-end PIT-38 and PIT-ZG filings.

Finding from year-one of disciplined multi-currency tracking: 8% of her apparent annual net-worth gain was FX-driven (EUR strengthening vs PLN) rather than investment-driven. Knowing this changed her decision on whether to hold cash in EUR or PLN going forward.

FAQ — Multi-Currency Net Worth Apps

Q: Can I track Polish IKE and IKZE in Kubera or Sharesight? A: Kubera yes, as a custom account with manual valuation updates. Sharesight only if your IKE provider gives you per-instrument data — most Polish IKE providers do not export this way, so manual entry is common.

Q: Does any app file Polish tax forms automatically? A: No. Sharesight produces foreign-jurisdiction tax reports that you adapt for Polish PIT-38 and PIT-ZG. Most users hand the Sharesight CSV plus Kubera summary to a Polish accountant for filing.

Q: Which currency should I set as "primary" if I live in PL but hold mostly EUR investments? A: PLN if you spend, file taxes, and plan in PLN. Set EUR as your "investment reporting currency" so your ETF performance is judged in the right unit. Most apps allow separate display and reporting currencies.

Q: How do I handle real estate FX exposure? A: A property in Berlin is a EUR asset even if you live in Warsaw. Mark it in EUR, refresh appraisal annually, let the app convert to PLN for net-worth display. Do not "EUR-convert and forget" — the FX moves matter.

Q: I have RSUs from a US employer vesting quarterly. Best app? A: Sharesight handles the vest-day FX correctly and tracks ongoing capital gain. Kubera also supports it via a custom account model. Both will produce numbers you can hand to your accountant for Polish PIT.

Q: How do AI features help with multi-currency net worth? A: AI is useful for scenario questions ("what's my PLN net worth if EUR drops 10%?") and for surfacing unusual moves ("your EUR holdings moved 8% this quarter — 3% was investment, 5% was FX"). This space is early. Freenance is building toward this use case for EU multi-currency holders — depending on which accounts you connect, depth will vary.

Sources

• Kubera feature documentation
• Sharesight tax reports and methodology pages
• Monarch Money product pages
• Snowball Analytics feature documentation
• NBP (Narodowy Bank Polski) FX reference rate methodology
• Polish KAS (Krajowa Administracja Skarbowa) PIT-38 and PIT-ZG guidance 2026
• EBA (European Banking Authority) PSD2 register
• EDPB (European Data Protection Board) data export guidance