Korean Banks' 90% FX Preferential Calculator
Reveal the true effective cost of outbound remittance from Korean commercial banks, even at advertised 90% FX preferential rates.
Launch →Calculators & Tools
Interactive tools for U.S. patent strategy, cross-border business, and international money movement.
Last updated: June 19, 2026
Cross-Border Money & Finance
Tools for expats, global families, and founders moving money internationally — exposing the real, all-in cost of remittance corridors after FX spreads, SWIFT fees, correspondent bank charges, and stablecoin alternatives.
Money That Goes to Your Family Calculator
Compare four real remittance routes — stablecoin, Wise/Remitly, Western Union, and bank wire — and see exactly what your recipient receives after every fee.
Launch →Stablecoin vs. SWIFT Payout Calculator
Compare stablecoin payout rails against traditional SWIFT routing for cross-border B2B and personal transfers.
Launch →Crypto DCA & Stablecoin Yield Simulator
Compare dollar-cost averaging into crypto, stablecoin yields, and traditional savings over a 1–10 year horizon.
Launch →U.S. Patent & IP Strategy
Tools for inventors and IP professionals quantifying the real cost of U.S. patent strategy — from filing fees and claim economics to multiple dependent claim traps and 20-year lifecycle maintenance costs.
US Patent Filing & Maintenance Fee Estimator
USPTO utility patent filing fees, MDC surcharge logic, and full 20-year lifecycle maintenance cost projections for Large, Small, and Micro entities.
Launch →Borderless Business & Tax
Tools for solo founders and U.S.-connected expats running businesses across borders — S-Corp salary mechanics, U.S. expat tax presence tests, payment processor fees, and FIRE and retirement math.
S-Corp Reasonable Salary Calculator
Estimate a defensible "reasonable salary" for a U.S. S-Corporation owner-operator under IRS guidance.
Launch →U.S. Expat Physical Presence Test Tracker
Track days inside and outside the United States toward the 330-day Physical Presence Test for the Foreign Earned Income Exclusion.
Launch →Stripe vs. PayPal Fee Calculator
Compare per-transaction fees, international surcharges, and currency conversion costs across Stripe and PayPal.
Launch →Mortgage Early Payoff Calculator
Model the total interest saved and timeline shortened by making extra principal payments against a U.S. mortgage.
Launch →Advanced AI API Cost Estimator
Project monthly spend on AI API usage across models, token volumes, and concurrent workloads, for solo founders integrating LLMs into their stack.
Launch →The Asset Portfolio Planner
A baseline portfolio planner for FIRE math, retirement timing, and the Crossover Point.
Launch →Advanced Multi-Asset Portfolio Planner
An advanced version of the portfolio planner accounting for 401(k) employer match, tax brackets, and crypto allocations.
Launch →About the SK Pulse Tools
Every tool in the SK Pulse suite exists to quantify a real decision that a global founder, inventor, or expat actually faces — not as a marketing device, a lead-capture funnel, or a generic calculator. Each one was built because the underlying decision, whether a USPTO filing, an S-corp salary, or a remittance corridor, is one the author has seen mis-estimated by smart people due to opaque fee structures or counterintuitive rules.
Every calculator publishes its assumptions, data sources, and known limitations directly on the tool's own page. Where official figures exist — USPTO fee schedules, IRS publications, Financial Supervisory Service guidance, bank disclosures — those are the primary sources. Where worked examples or illustrative figures are used, they are clearly labeled as illustrative, not as live data.
All calculators run entirely in your own browser. No account is required, and calculator inputs are not transmitted to or stored by SK Pulse. The tools are educational simulations, not financial, legal, or tax instruments — verify any output against an official source or a qualified professional before making a financial, legal, or business decision.
Methodology and Limitations
The same standard applies across every tool in the suite:
- Sources. Each tool's underlying figures come from official sources where they exist — USPTO fee schedules, IRS publications, FSS guidance, published bank disclosures, fintech provider terms. Each tool's individual page lists its specific sources.
- Update cadence. Official figures change. SK Pulse updates calculators when underlying figures change, but does not warrant that any specific number shown is current at the moment of use. The authoritative source is always the issuing body, not this site.
- Worked examples are labeled. Sample amounts, illustrative rates, and example scenarios are clearly identified on each tool's page. They are not live quotes or guaranteed outcomes.
- Verification is the visitor's responsibility. Outputs should be cross-checked against the issuing body or a qualified licensed professional before any financial, legal, or business decision is made.
Your Inputs Stay With You
Every calculator on SK Pulse runs entirely in your own browser. Calculator inputs — transfer amounts, salary figures, patent claim counts, asset balances, or anything else you type into a tool — are not transmitted to SK Pulse and not stored on any SK Pulse server. SK Pulse has no record of any individual calculation a visitor performs.
Standard server log data, such as IP address, browser type, page visited, and timestamp, may still be recorded by the web server, as described in the Privacy Policy. The values you enter into a calculator are not part of that log data.
What These Tools Are Not
The calculators are not legal advice; they cannot evaluate the patentability of a specific invention, the validity of a specific claim, or any other matter requiring a licensed attorney or registered patent agent. They are not tax advice; they cannot determine an individual visitor's tax obligations, residency status, or treaty position. They are not financial or investment advice — portfolio and yield tools illustrate compound math under stated assumptions, not a recommendation to invest, hold, or sell any asset. And they are not a quote: output is an estimate based on the inputs and assumptions disclosed on each tool's page.
Reporting an Error
If you identify a factual error, an outdated figure, a broken calculator output, or a methodology question, you are encouraged to report it to contact@sk-pulse.com with as much specificity as possible — the tool name, the input values that produced the issue, and the source supporting the correction. Legitimate corrections are acted on as soon as the relevant source can be verified.
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