Find Hidden Financial Fees with ChatGPT — 5 Prompt Templates to Share

Korean digital nomads juggle three or four financial ecosystems — a Korean card, a foreign bank account, Wise/Revolut balances, a brokerage, and maybe a US LLC account. Each one buries fees in fine print. The fastest way to find them? Feed the terms into ChatGPT and ask the right question.

Here are five prompt templates you can copy, paste your own numbers into, and get actionable answers in under a minute.

Prompt 1: Credit Card Rewards vs Fees — Is Your Card Actually Free?

Many premium cards in Korea (The Premier, Hyundai Card The Pink, etc.) charge annual fees that eat into your rewards. ChatGPT can do the math.

Copy this prompt:

I have a [Card Name] credit card in Korea. My annual fee is ₩[amount].
I spent approximately ₩[total spend] last year, broken down as:
- Domestic: ₩[amount]
- Online: ₩[amount]
- Overseas: ₩[amount]
- Dining: ₩[amount]

My card gives:
- [X]% cashback on [category]
- [Y]% points on [category]
- [Z] miles per ₩[amount] on flights

Calculate my effective net return after the annual fee.
Compare this to a no-fee alternative like [alternative card].
Should I downgrade or cancel this card?

Try it: Replace with your actual numbers from last month's statement. ChatGPT will surface whether that "premium" status is worth it — often it's not unless you spend over ₩2M/month on the bonus categories.

Prompt 2: Remittance Fee Comparison — Which Channel Is Cheapest Right Now?

Exchange rates change hourly. ChatGPT can compare Wise, Revolut, WireBarley, and your bank in real time if you feed it the current rates.

Copy this prompt:

I need to send [amount] [currency] to a [destination country] bank account.
I found these rates and fees today:

| Service | Exchange Rate | Fee | Expected Delivery |
|---------|--------------|-----|-------------------|
| Bank wire | [rate] | [fee] | [time] |
| Wise | [rate] | [fee] | [time] |
| WireBarley | [rate] | [fee] | [time] |
| Revolut | [rate] | [fee] | [time] |

Calculate the final amount received in local currency for each.
Which is best for this specific transfer?
Is there a minimum amount where the best option changes?

Pro tip: Spend the weekend rate-checking — Korean banks typically offer worse rates on Friday afternoons. Services like Wise use mid-market rate + transparent fee; the difference is often 1–3% you're leaving on the table with a wire transfer.

Prompt 3: Subscription Audit — Find the £15/Month You're Leaking

Korean nomads accumulate subscriptions in KRW, USD, EUR, and SGD — and forget half of them.

Copy this prompt:

Here is my bank and card transaction history from the last 3 months:

[paste transactions — Date, Merchant, Amount, Currency]

Identify all recurring subscriptions and their monthly costs.
Group them by category (streaming, productivity, cloud, gym, insurance, etc.).
Calculate total monthly subscription spend in KRW (use current exchange rates).
Flag any that I don't seem to be using based on transaction gaps.
Suggest which ones to cancel first and what I'd save annually.

How to get the data: Most Korean banks (토스뱅크, 신한 쏠, KB 스타뱅킹) let you export CSV from the app. Strip the account number column and paste the rest. ChatGPT will spot the ₩9,900 Apple iCloud upgrade you forgot about and the $4.99 Dropbox plan you haven't touched in six months.

Prompt 4: Insurance Policy Decoder — What Are You Actually Paying For?

Insurance documents in Korean (or English legalese) are designed to be impenetrable. ChatGPT is excellent at extracting key numbers from policy PDFs.

Copy this prompt:

I have an insurance policy with the following terms:

[paste key sections — premium, coverage limits, deductibles, exclusions, renewal terms]

Translate the coverage into plain language.
Calculate my effective monthly cost (annual premium / 12).
List the top 3 scenarios where this policy would NOT pay out.
Compare the premium to the industry average for [age/occupation/country].
Does this policy have hidden "gotcha" exclusions (war, nuclear, high-risk sports, etc.)?

Korean bonus: If your policy document is in Korean, ChatGPT handles the translation. Just paste the Korean text directly. Ask it to flag clauses like 면책사항 (exclusions) and 갱신 조건 (renewal conditions) specifically.

Prompt 5: Year-End Tax Prep — Are You Missing Deductions?

This one is for freelancers and US-Korea dual-income earners. Before you hand everything to an accountant, run this audit yourself.

Copy this prompt:

I am a [Korean resident / US citizen in Korea / Korean freelancer with foreign income].
My estimated 2026 income breakdown:
- Korean earned income: ₩[amount]
- Foreign freelance income: $[amount] (received via [Wise/Revolut/bank])
- Investment income (dividends, capital gains): ₩[amount]

My known deductible expenses:
- National pension: ₩[amount]
- Health insurance: ₩[amount]
- Rent: ₩[amount] (or monthly)
- Credit card spend (min 25% of salary for deduction): ₩[amount]
- [Other expenses]

Estimate my total tax liability for 2026 under Korean tax law.
Suggest deductions I might be missing (e.g., pension account contributions, education expenses, charitable donations).
Which category should I maximize before year-end to reduce taxable income?

Important: ChatGPT is not your accountant. Use this as a prep tool before you meet with a 세무사 (Korean tax accountant). It will save you an hour of billable time and help you ask smarter questions.

The One-Sentence Workflow

Once a month, export your transactions, paste one of these prompts, and fix one leak. In six months you'll recover enough to fund a round-trip ticket somewhere you actually want to be.

Have a prompt you use regularly? Reply on social or send it in — we'll share the best ones in a follow-up post.