What this Korea-specific annuity comparison answers
A foreign-currency annuity insurance contract sets premiums and annuity payments in US dollars, Japanese yen, euros, or another contract currency.
A household that earns and spends Korean won is therefore exposed not only to the insurance design but also to the exchange rate when buying currency for premiums, the exchange rate when converting pension payments back to won, and transaction costs in both directions.
A higher declared interest rate by itself cannot establish that a foreign-currency illustration is better than a KRW illustration.
This calculator starts with figures already printed in two actual insurer illustrations: premium, annuity start, guaranteed payout term, monthly annuity, verified monthly deductions, and surrender value at annuity start.
It discounts monthly premiums and guaranteed annuity payments to one present date, applies a separate purchase exchange rate and three payout exchange-rate scenarios, and deducts both buy and sell spreads.
It then solves for the payout FX rate at which the two net present values are equal.
The prefilled values are fictional and exist only to demonstrate the controls.
The calculator does not estimate an insurer's future declared rate, rebuild an account value, recommend a product, or forecast an exchange rate.
Use it after receiving comparable illustrations, not instead of obtaining them.
Illustration inputs
It uses insurer-stated monthly benefits rather than creating a future benefit from an assumed declared rate.
Monthly present value
Premiums paid sooner and annuities received much later are translated to the same valuation date.
FX break-even
It identifies the average payout conversion rate required for the foreign plan to match the KRW plan by NPV.
How this differs from the broader foreign-currency insurance tool
MowaTool also offers a broader foreign-currency insurance calculator for early exploration of foreign whole-life and annuity insurance.
That tool accepts an assumed declared rate and expense ratio to estimate a future accumulation value.
The present page is narrower: it compares the guaranteed-period cash flows printed in one foreign-currency annuity illustration and one KRW annuity illustration.
This distinction matters because a declared rate is not the amount deposited into a customer's bank account.
Product expenses, guarantee structures, payout options, timing, and currency conversion sit between a headline rate and usable retirement income.
By using the two printed monthly annuities, this tool keeps those product calculations with the insurer and concentrates on timing, conversion costs, and the FX threshold.
Scope comparison between the two foreign-currency insurance calculators| Dimension | This calculator | Broader tool |
|---|
| Decision point | After receiving two annuity illustrations | While exploring a foreign insurance structure |
| Core input | Printed premiums, guaranteed monthly annuities, terms, and surrender values | Declared-rate and expense assumptions |
| Core output | Monthly NPV and payout FX break-even | Estimated accumulation and an FX band |
| Excluded here | Whole-life death benefits and declared-rate forecasts | Actual two-illustration guaranteed cash-flow comparison |
Documents and figures to collect first
Consistent definitions matter more than extra decimal places.
Ask both insurers for illustrations prepared for the same insured person, premium mode, payment term, annuity start, payout form, and guaranteed term whenever possible.
Confirm whether each monthly annuity is a guaranteed amount or an example based on the current declared rate, and whether it is shown before or after deductions.
- Find the monthly premium or single premium and the premium-payment term in each illustration.
Do not enter a KRW equivalent in the foreign amount field; enter the contractual foreign amount and identify its currency.
- Record the years from today until the annuity begins and the guaranteed payout term.
For a life annuity, enter only the guaranteed period that you intend to compare deterministically in this tool.
- Copy the monthly annuity from the same guarantee and declared-rate row in each document.
If the amount is gross, enter only a monthly tax or contract deduction verified by the insurer or a tax professional; if it is already net, leave the deduction at zero.
- Find the net surrender value at the annuity-start date after known contract and tax deductions.
It is treated as an alternative to starting the annuity, not an additional asset received together with the annuity.
- Confirm the spread after any exchange-rate discount when buying foreign currency for premiums and selling foreign payouts for KRW.
Also ask whether the insurer can pay into a foreign-currency account and what separate withdrawal or transfer charges may apply.
Questions to send the insurer in writing
- Is this monthly annuity guaranteed, or does it assume that the current declared rate continues.
- Is the monthly amount gross, or has tax and every contract deduction already been removed.
- Which exchange rate and post-discount spread apply when premiums are purchased and payouts are sold.
- Can each payout be received directly in a foreign-currency account, and what fees remain.
- What net amount would be paid if the contract were surrendered when the annuity is scheduled to begin.
- Does the specific contract meet a Korean tax exemption, considering its date, owner, premium changes, and the owner's other policies.
Entering exchange rates and spreads
Separate premium conversion from payout conversion
The premium FX input is an average effective rate or conservative planning rate for purchasing the contract currency during the payment period.
Actual monthly rates will differ, but the model intentionally uses one level rate for every premium month and does not forecast the path.
For an existing contract, an effective historical average may be reconstructed from the KRW actually paid and the foreign premiums purchased; for a new contract, use a stress level that the household could afford.
The lower, base, and higher payout rates are sensitivity assumptions for converting guaranteed annuity payments.
A lower quoted rate produces fewer won per foreign unit and is adverse for a KRW-spending retiree, while a higher rate has the opposite effect.
The scenarios have no probability attached, and the calculator does not claim that any one of them is likely.
Japanese yen uses a KRW-per-100-JPY quote
USD and EUR inputs are KRW per one unit of foreign currency, while the JPY input follows the common Korean quote of KRW per JPY 100.
If the quote is KRW 900 per JPY 100, a JPY 10,000 monthly premium costs KRW 90,000 before the purchase spread.
The calculator divides by the quote unit internally, so do not divide a yen amount by 100 yourself.
The purchase and sale spreads work in opposite directions
A 1% buy spread converts a foreign premium at 101% of the entered premium rate.
A 2% sell spread converts annuity and surrender proceeds at 98% of each payout scenario rate.
The reported exchange cost is the present value of these differences across the relevant cash flows, not merely a one-time nominal fee.
Monthly present-value method
Timing of premiums and guaranteed annuities
The annual effective discount rate is converted to an effective monthly rate.
A monthly premium is paid at the end of each modeled month, while a single premium is paid at month zero.
If the annuity starts 15 years from now, its first monthly payment is placed in month 181; a 20-year guarantee then creates 240 monthly payments.
monthly rate = (1 + annual discount rate)^(1 / 12) - 1
cash-flow PV = monthly amount / (1 + monthly rate)^payment month
plan NPV = net guaranteed-annuity PV - premium PV
foreign advantage = foreign-plan NPV - KRW-plan NPV
The model subtracts the entered monthly deduction before valuing annuity receipts.
It does not apply a blanket Korean tax rate to the whole benefit because an annuity payment can include returned principal and because tax treatment depends on contract facts.
Intermediate calculations retain precision; displayed KRW values are rounded to the nearest won, foreign amounts to two decimals, and percentages to four decimals.
Solving the break-even payout FX rate
The foreign guaranteed-annuity PV is first calculated in contract currency and reduced by the payout sell spread.
The calculator then solves the linear exchange-rate equation that makes the foreign plan NPV equal to the KRW plan NPV.
This yields a quoted rate per USD 1, EUR 1, or JPY 100, matching the input convention.
Break-even payout FX = (KRW-plan NPV + foreign premium PV in KRW) / (foreign annuity PV in contract currency × net sell factor)
The result assumes one level average conversion rate over the guaranteed payout term.
Monthly conversion, delayed conversion, or continued foreign-currency holding will create a different path-dependent result.
Worked fictional example and validation numbers
Consider a deliberately simple case with no discounting and no exchange spread.
The foreign plan charges USD 100 monthly for one year and pays USD 120 monthly for one guaranteed year beginning one year from now; the KRW plan charges KRW 100,000 and pays KRW 120,000 on the same schedule.
At a premium and base payout rate of KRW 1,000 per USD, both premium PVs are KRW 1,200,000, both annuity PVs are KRW 1,440,000, and both NPVs are KRW 240,000.
Net present values in the zero-discount zero-spread validation example| Payout FX | Foreign NPV | KRW NPV | Foreign advantage | Amount-only result |
|---|
| KRW 800 | -KRW 48,000 | KRW 240,000 | -KRW 288,000 | KRW plan leads |
| KRW 1,000 | KRW 240,000 | KRW 240,000 | KRW 0 | Tie |
| KRW 1,200 | KRW 528,000 | KRW 240,000 | KRW 288,000 | Foreign plan leads |
The exact break-even in that case is KRW 1,000 per USD.
Adding a 1% premium buy spread and a 2% payout sell spread raises foreign premium PV to KRW 1,212,000 and reduces its base annuity PV to KRW 1,411,200.
Foreign NPV becomes KRW 199,200, or KRW 40,800 below the KRW plan, and the payout break-even rises to KRW 1,028.91 per USD.
A yen validation uses a quote of KRW 900 per JPY 100 and a JPY 10,000 premium.
The pre-spread KRW premium is KRW 90,000, demonstrating why the quote unit must be handled explicitly.
These figures are deterministic test vectors, not representative market illustrations or expected returns.
How to read the result in order
- Check whether all four verification boxes are complete.
An unchecked result is useful for exploring assumptions but should not be treated as ready for a purchase decision.
- Read the base scenario leader and the KRW difference.
A small lead may be reversed by one definition error in tax, spread, guarantee basis, or monthly benefit.
- Compare the break-even rate with a range the household can tolerate, rather than with a single optimistic forecast.
If the break-even exceeds even the higher scenario, the foreign plan does not catch up within the entered range.
- Inspect the spread from lower to higher FX outcomes.
The swing in foreign advantage is often more informative about retirement-income risk than the base-case point estimate.
- Review the premium, annuity, and exchange-cost components.
If transaction costs account for much of the difference, ask about direct foreign-currency receipt, preferred exchange rates, transfer fees, and conversion frequency.
- Finally, read the surrender-at-start alternative separately.
A low surrender PV can signal substantial liquidity loss before retirement, but it must never be added to annuity PV because the two choices are mutually exclusive.
Practical planning scenarios
Before a new application
Reissue both illustrations on matched terms, enter their printed figures, and measure how far the break-even rate sits above or below the base assumption.
Even when the foreign plan leads, test whether retirement spending could absorb the lower-FX outcome without forced conversion at an unfavorable time.
Reviewing an existing monthly-pay contract
Estimate the effective rate from actual KRW paid to date, then obtain an updated benefit and surrender illustration.
This calculator does not instruct a surrender, reduction, or continuation, so confirm each contractual alternative and its loss directly with the insurer.
Matching retirement spending currencies
A retiree whose expenses are almost entirely in KRW is likely to convert much of each foreign payment.
Someone with recurring overseas living costs may retain part of the foreign benefit, so a full-KRW conversion model should be supplemented by a separate currency-specific spending plan.
Preparing for a family or adviser meeting
Sharing one input sheet and three sensitivity outcomes keeps the discussion focused on contract evidence rather than a confident FX prediction.
Beneficiary rules, death benefits, inheritance consequences, and life-contingent benefits after the guarantee period should remain explicit follow-up questions.
Korean law, disclosure, and consumer alerts checked in 2026
The legal and official-source review for this calculator was completed on September 3, 2026.
Article 16(1)(9) of the Korean Income Tax Act places gains from savings-type insurance within interest income as a starting rule, while Article 25 of its Enforcement Decree defines contract-specific exceptions for qualifying long-maintenance, monthly-savings, and life-annuity structures.
The calculator cannot determine an exemption because it does not know every contract date, owner-level policy, premium change, prepayment, or life-annuity condition.
Korean legal and official references for the foreign and KRW annuity comparison| Reference | Version checked | Boundary used here |
|---|
| Income Tax Act, Article 16 | MST 280405 · effective January 1, 2026 | Recognizes the insurance-gain starting rule without deciding one contract's tax result |
| Income Tax Act Enforcement Decree, Article 25 | MST 286211 · effective July 1, 2026 | Uses only a verified monthly deduction instead of auto-applying an exemption or tax rate |
| Financial Consumer Protection Act, Articles 19 and 23 | MST 277247 · effective January 2, 2026 | Turns explanation and contract-document review into explicit verification gates |
| Insurance Business Act, Articles 95-2 and 124 | MST 265389 · effective January 31, 2025 | Points users to insurer documents and Korea Life Insurance Association product disclosures |
| Commercial Act, Article 638-3 | MST 272919 · effective July 23, 2026 | Contract terms and their explanation take priority over a calculator result |
A February 25, 2025 Financial Supervisory Service consumer alert states that foreign-currency insurance should not be treated as an FX investment and highlights premium and benefit changes from exchange rates, foreign interest-rate exposure, conversion fees, and early-cancellation loss.
A joint Financial Services Commission and FSS notice from October 25, 2020 similarly explains that premiums and benefits are denominated in foreign currency and that relevant currency and rate risk can remain with the consumer.
Read the archived 2025 consumer alert and the official FSC notice before treating any numeric advantage as a decision.
Product comparisons are available through the Korea Life Insurance Association disclosure service, while historical exchange-rate context is available from the Bank of Korea ECOS snapshot.
Neither source replaces the policy terms and individual illustration, and historical rates do not supply a future forecast.
Present-value timing follows standard discounted cash-flow logic, with NIST Handbook 135e2025 used as an additional methodological reference rather than a Korean product rule.
Risks and values outside the model
- Future declared-rate changes, minimum guarantees, dividends, product expenses, risk charges, and changing monthly benefits are not forecast.
- Life-contingent payments after the guarantee period, death benefits, beneficiary payments, and inheritance consequences are not added.
- Insurer credit risk, depositor-protection scope, payment restrictions, exclusions, and claim decisions are not evaluated.
- The FX path, foreign interest rates, monthly conversion timing, and returns after retaining foreign currency are not estimated.
- Tax exemption, withholding, aggregate financial-income taxation, and the tax character of currency gains or losses are not determined.
- Cooling-off, cancellation, unlawful-contract termination, reduction, extension, and early-surrender rights or losses are not decided.
A larger NPV is not a product recommendation
Even if the foreign plan leads in all three scenarios, the result means only that its entered guaranteed cash flows have a larger KRW present value under those assumptions.
Retirement spending currency, emergency liquidity, health, ability to sustain premiums, family protection, and contract enforceability can change the practical choice.
Frequently asked questions
Is the foreign annuity always better when its declared rate is higher
No.
A declared rate is only one component behind an illustrated payout, while expenses, guarantees, payout structure, and timing are also embedded in the insurer's figures.
For a KRW-spending household, premium conversion, payout conversion, and both spreads must also be reflected.
What future exchange rate should I enter
The calculator supplies no recommended forecast.
Choose a lower stress rate, a central comparison rate, and a higher rate wide enough to reveal the sensitivity of retirement income.
Historical data may inform the width of a scenario but cannot validate a future outcome.
Why enter a monthly deduction instead of a tax rate
Korean savings-insurance taxation can depend on the contract date, payment pattern, maintenance period, payout form, owner, and other contracts.
Applying one percentage to the entire annuity could incorrectly treat returned principal as taxable income.
Enter a deduction only when it has been verified; otherwise leave it at zero and label the result as a pre-tax comparison.
Why does a life annuity use only the guaranteed term
This tool compares the deterministic guaranteed-period cash flows visible in two illustrations.
Payments after that period depend on survival and payout design, so they are not automatically appended without a mortality model.
Ask both insurers for comparable longevity scenarios if post-guarantee lifetime income is material to the decision.
Is surrender value added to annuity present value
No.
Starting the annuity and surrendering at the start date are mutually exclusive alternatives.
Adding both would double-count the value of one contract, so the calculator presents a separate surrender-alternative NPV.
Does an FX rate above break-even mean I should buy the policy
No.
Break-even is the rate at which the entered cash flows have equal amount-only NPV, not a prediction that the rate will occur or a complete suitability test.
Review current matched illustrations, policy terms, liquidity, taxation, family needs, and independent professional advice before applying.
Turn the comparison into a concrete next step
Replace every fictional value with figures from the same basis row in two current illustrations and complete all four verification checks.
Save the break-even rate, three-scenario differences, exchange-cost PV, and surrender alternative, then mark any item that needs a written insurer answer.
If terms differ or the break-even sits outside a tolerable range, pause the decision and request reissued illustrations on matched terms.
Final checklist
- Match premium mode, payment term, annuity start, guarantee term, and gross or net basis.
- Treat lower, base, and higher FX rates as sensitivity inputs, not forecasts.
- Prefer printed monthly annuities and surrender values to a headline declared rate.
- Let the insurer, tax adviser, and legal professional resolve tax and contract questions.