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Practical guides on personal finance, investing, and tax. Read fast, apply faster.

What the trovetool blog covers

The trovetool blog writes on wealth building, tax, and investing — articles a Korean resident can actually put to use. It picks topics that are hard to find well-organized for a Korean context: how compound interest works, how to set a FIRE target, the tax savings of ISA and pension accounts, comparisons of dividend ETFs like SCHD and JEPI, and the overseas ETF capital gains tax.

Every article is paired with a calculator on the site. After explaining the concept and tax structure, in-text links open the compound, FIRE, ISA, or dividend calculator so you can plug in your own numbers right away. The aim isn't an article you just read, but a flow where you immediately apply what you read to your own situation. Tax rates and deductions reflect the time of writing, so model important decisions with the tools and confirm them with a professional.

The Backdoor Roth IRA in 2026: How High Earners Legally Skip the $168,000 Income Limit — Without Triggering the Pro-Rata Tax Trap
Finance2026-08-05 · 12 min read

The Backdoor Roth IRA in 2026: How High Earners Legally Skip the $168,000 Income Limit — Without Triggering the Pro-Rata Tax Trap

In 2026 the Roth IRA phases out at $168K single / $252K joint. Here's the legal backdoor workaround — the two-step move, the pro-rata trap that surprises most people, and a full worked example.

#backdoor Roth#Roth IRA#2026 limits#pro-rata rule#Form 8606#high earners#retirement#IRA
The Fed Might Actually Hike on July 29 — How a Rate Increase Nobody Predicted a Year Ago Would Hit Your Money
Finance2026-07-24 · 10 min read

The Fed Might Actually Hike on July 29 — How a Rate Increase Nobody Predicted a Year Ago Would Hit Your Money

For the first time this cycle, markets price a real chance the Fed raises rates July 29. Here's why a hike is on the table, the odds, and what it does to your mortgage, savings, and portfolio.

#Federal Reserve#FOMC#interest rates#rate hike#inflation#high-yield savings#mortgage rates
Korea's Rate Decision, July 16: The Bank of Korea Hiked to 2.75% — What the Surprise Move Does to Your Loan, Deposit, and Investments
Finance2026-07-08 · 11 min read

Korea's Rate Decision, July 16: The Bank of Korea Hiked to 2.75% — What the Surprise Move Does to Your Loan, Deposit, and Investments

On July 16, 2026, the Bank of Korea raised its base rate from 2.50% to 2.75% — a first hike in 3.5 years that defied the cut-or-hold consensus. Updated with the hike's real-number impact on mortgages, deposits, and portfolios.

#base rate#Bank of Korea#interest rate#rate hike#mortgage#monetary policy
The 2026 Child Tax Credit Is $2,200 — the $1,700 Refundable Cap, the $2,500 Earned-Income Floor, and the SSN Rule That Cuts Millions Out
Finance2026-07-06 · 10 min read

The 2026 Child Tax Credit Is $2,200 — the $1,700 Refundable Cap, the $2,500 Earned-Income Floor, and the SSN Rule That Cuts Millions Out

OBBBA locked the Child Tax Credit at $2,200 per child for 2026, but only $1,700 is refundable, the poorest families can't get all of it, and a new SSN rule excludes ITIN filers. Here's the exact math.

#Child Tax Credit#OBBBA#2026 taxes#ACTC#tax credits
Losing Health Insurance Dependent Status in Korea (2026): The 20M-Won Income Line, the 10M-Won Financial-Income 'Cliff,' and How to Avoid the Regional-Subscriber Premium Bomb
Finance2026-07-03 · 12 min read

Losing Health Insurance Dependent Status in Korea (2026): The 20M-Won Income Line, the 10M-Won Financial-Income 'Cliff,' and How to Avoid the Regional-Subscriber Premium Bomb

A full 2026 breakdown of dependent status under Korea's national health insurance — the 20 million won income limit, the 540 million won property threshold, and the brutal financial-income cliff where crossing 10 million won by 1 won pulls the entire amount into your income. Plus the monthly 150,000–300,000 won regional-subscriber premium that hits when you lose dependent status, shown with real numbers and defense strategies.

#Health Insurance#Dependent Status#Financial Income#Korea#Regional Subscriber
The 2026 SALT Deduction Is $40,400 Now — But the 30% Phase-Out Creates a Hidden 45% Tax Bracket
Finance2026-07-01 · 10 min read

The 2026 SALT Deduction Is $40,400 Now — But the 30% Phase-Out Creates a Hidden 45% Tax Bracket

The 2026 SALT cap jumped from $10,000 to $40,400. Who really benefits, the $505K phase-out that pushes your marginal rate near 45%, and how to plan around it.

#SALT deduction#OBBBA#itemized deductions#state and local tax#2026 taxes#IRS#MAGI#tax planning
Korea's Youth Future Savings Launched June 22 — Turn 500K KRW/Month Into 22.5M in 3 Years? A Full Breakdown of the 12% vs 6% Government Match
Finance2026-07-01 · 12 min read

Korea's Youth Future Savings Launched June 22 — Turn 500K KRW/Month Into 22.5M in 3 Years? A Full Breakdown of the 12% vs 6% Government Match

Korea's Youth Future Savings account launched on June 22, 2026: ages 19–34, up to 500,000 KRW a month for three years, a government match of 12% (preferred) or 6% (standard), and tax-free interest. Here's the real payout by income band, how it compares with the Youth Leap Account, and whether switching pays off — all verified against primary sources.

#Youth Future Savings#Youth Leap Account#government match#savings#tax-free#wealth building
Social Security COLA 2027: Why the Estimate Just Jumped to 4.7% — and the Tax Trap That Eats It
Finance2026-06-27 · 10 min read

Social Security COLA 2027: Why the Estimate Just Jumped to 4.7% — and the Tax Trap That Eats It

The 2027 Social Security COLA estimate climbed to 4.7% as CPI-W hit 4.4%. See how the COLA math actually works, what it adds to your check, and the un-indexed tax trap that claws it back.

#Social Security#COLA#Retirement#Inflation#Taxes
Korea's National Pension Rises Again in July 2026: A 9.5% Rate, a New ₩6.59M Ceiling — How Much More Leaves Your Paycheck
Finance2026-06-26 · 11 min read

Korea's National Pension Rises Again in July 2026: A 9.5% Rate, a New ₩6.59M Ceiling — How Much More Leaves Your Paycheck

In 2026 Korea's National Pension goes up twice: a January contribution-rate hike to 9.5% and a July ceiling raise from ₩6.37M to ₩6.59M of monthly income. Here is the difference between the two, the added cost by income band, and what the 43% replacement rate really means.

#national pension#pension reform#contribution rate#Korea#take-home pay
The 2027 HSA Limits Are In — Why It's the Most Tax-Advantaged Account in America (and the 'Stealth IRA' Move Most People Miss)
Finance2026-06-25 · 12 min read

The 2027 HSA Limits Are In — Why It's the Most Tax-Advantaged Account in America (and the 'Stealth IRA' Move Most People Miss)

2027 HSA limits jump to $4,500 / $9,000. Here's the triple tax advantage in plain English, the age-65 'stealth IRA' pivot, the receipt strategy, and the mistakes that quietly cost you thousands.

#HSA#triple tax advantage#2027 limits#IRS#HDHP#stealth IRA#retirement#tax-free
How to Calculate Capital Gains Tax on U.S. ETFs in Korea (2026)
Finance2026-06-24 · 12 min read

How to Calculate Capital Gains Tax on U.S. ETFs in Korea (2026)

22% capital gains tax on overseas ETFs, the 2.5M KRW annual deduction, currency gains and loss-netting — a structure Korea's 2026 tax reform proposal leaves untouched. With a tax-by-gain-size table, domestic vs. overseas comparison, and a mistakes checklist.

#capital gains tax#ETF#tax#overseas investing#loss netting
ISA Account — Is Korea's 'Tax-Free Account' Really Tax-Free?
Finance2026-06-24 · 12 min read

ISA Account — Is Korea's 'Tax-Free Account' Really Tax-Free?

ISA's tax-free limits (2M general / 4M lower-income), 9.9% separate taxation, loss offsetting, the 60-day IRP transfer — plus what Korea's 2026 tax reform bill proposes: a 5-year contract cap and the new Productive Finance ISA.

#ISA#tax#investing#tax saving#IRP
Korea's July Property Tax Bill Is Coming — Why a Single-Home Owner Pays Half, and the 43% Fair-Market-Value Ratio Behind It
Finance2026-06-24 · 11 min read

Korea's July Property Tax Bill Is Coming — Why a Single-Home Owner Pays Half, and the 43% Fair-Market-Value Ratio Behind It

Korea's residential property tax is due July 16–31, 2026. The June 1 assessment date, the 43–45% fair-market-value ratio for single-home owners, standard vs. special rates with a worked example, and ways to trim what you pay — explained plainly.

#property tax#Korea#single-home#tax saving#fair-market-value ratio
The Savings Ladder Strategy (2026): Deposit vs. Installment Savings
Finance2026-06-24 · 12 min read

The Savings Ladder Strategy (2026): Deposit vs. Installment Savings

Why an installment savings account pays only about half the interest of a lump-sum deposit, plus the savings ladder rotation strategy and after-tax interest (15.4%).

#installment savings#time deposit#savings ladder#interest calculation#personal finance#interest income tax
The $6,000 Senior Bonus Deduction: Why It Isn't 'No Tax on Social Security,' Who Phases Out, and How to Claim It in 2026
Finance2026-06-23 · 9 min read

The $6,000 Senior Bonus Deduction: Why It Isn't 'No Tax on Social Security,' Who Phases Out, and How to Claim It in 2026

The OBBBA's $6,000 senior deduction (2025–2028) isn't 'no tax on Social Security.' Who qualifies, the 6% phase-out math most guides get wrong for couples, and how to claim it for 2026.

#senior deduction#OBBBA#Social Security#standard deduction#IRS#retirement#MAGI#2026 taxes
Trump Accounts Launch July 5: How the $1,000 Baby Bonus Works, the Tax Catch, and What It Could Really Be Worth
Finance2026-06-21 · 10 min read

Trump Accounts Launch July 5: How the $1,000 Baby Bonus Works, the Tax Catch, and What It Could Really Be Worth

Starting July 5, 2026, every child born 2025–2028 can get a free $1,000 from the Treasury in a new 530A 'Trump Account.' Here's how to claim it with Form 4547, the contribution and tax rules, and what the money could grow into by age 18 and 60.

#Trump Accounts#530A#baby bonus#IRS#OBBBA#kids savings#IRA#compound interest
No Tax on Car Loan Interest in 2026: The $10,000 Deduction, the Made-in-USA Catch, and Who Actually Qualifies
Finance2026-06-20 · 9 min read

No Tax on Car Loan Interest in 2026: The $10,000 Deduction, the Made-in-USA Catch, and Who Actually Qualifies

The OBBB lets you deduct up to $10,000 of new-car loan interest a year through 2028 — even if you take the standard deduction. Here's how the phase-out, the U.S.-assembly rule, and Form 1098-VLI really work.

#car loan interest#auto loan deduction#OBBB#IRS#tax deduction#above-the-line
Korea's Income Tax Refunds Land in Late June 2026 — How to Check If Yours Is Stuck and Reclaim Five Years of Overpayments
Finance2026-06-20 · 9 min read

Korea's Income Tax Refunds Land in Late June 2026 — How to Check If Yours Is Stuck and Reclaim Five Years of Overpayments

If you filed your Korean comprehensive income tax return in May, your refund arrives late June to early July. Here's when, how much, and why — plus how to check on Hometax if it's stuck, and how to reclaim up to five years of overpaid tax.

#income tax refund#comprehensive income tax#amended return#Hometax#Korea tax
The Fed Meets June 16–17 With Inflation Back at 4.2% — What 'Higher for Longer' Now Does to Your Money
Finance2026-06-16 · 9 min read

The Fed Meets June 16–17 With Inflation Back at 4.2% — What 'Higher for Longer' Now Does to Your Money

Inflation jumped back to 4.2% on an energy shock and the Fed meets June 16–17 deeply divided. Here's what higher-for-longer rates mean for your savings, mortgage, and portfolio.

#Federal Reserve#FOMC#interest rates#inflation#CPI#high-yield savings#mortgage rates
No Tax on Tips and Overtime in 2026: The Caps, the Phase-Outs, and What Changes on Your W-2
Finance2026-06-15 · 9 min read

No Tax on Tips and Overtime in 2026: The Caps, the Phase-Outs, and What Changes on Your W-2

The OBBB lets workers write off up to $25,000 in tips and $12,500 in overtime through 2028 — and in 2026 it finally lands on your W-2. Here's how the caps and phase-outs work.

#no tax on tips#overtime deduction#OBBB#IRS#tax deduction#W-2
Q2 2026 Estimated Taxes Are Due Monday, June 15 — How to Size the Payment and Skip the Penalty
Finance2026-06-14 · 8 min read

Q2 2026 Estimated Taxes Are Due Monday, June 15 — How to Size the Payment and Skip the Penalty

The second-quarter 2026 estimated tax deadline is Monday, June 15. Here's who must pay, the safe-harbor rules that block IRS penalties, and how to size your check before the clock runs out.

#estimated taxes#quarterly taxes#IRS#self-employed#tax penalty#safe harbor
2026 401(k) and IRA Limits Are In: $24,500, an $8,000 Catch-Up, and the $11,250 'Super Catch-Up' for Ages 60–63
Finance2026-06-13 · 8 min read

2026 401(k) and IRA Limits Are In: $24,500, an $8,000 Catch-Up, and the $11,250 'Super Catch-Up' for Ages 60–63

The IRS set 2026 retirement limits: $24,500 for 401(k) deferrals, $7,500 for IRAs, an $8,000 catch-up at 50+, and a $11,250 super catch-up for ages 60–63. Here's how much more you can shelter — and the moves to make before December 31.

#401k#IRA#Roth IRA#contribution limits#retirement#tax planning
Korea's National Growth Fund: 40% Deduction Isn't a 40% Refund — Here's Your Real Tax Saving
Finance2026-06-12 · 11 min read

Korea's National Growth Fund: 40% Deduction Isn't a 40% Refund — Here's Your Real Tax Saving

Korea's National Growth Fund closed its first subscription window (May 22–Jun 11). We test the headline perks with real numbers: a 40% income deduction, a 20% loss buffer, and a 9.9% separate dividend tax rate — why a deduction is not a tax credit, plus the ₩25M combined-deduction trap.

#National Growth Fund#income deduction#separate taxation#loss protection#productive finance Korea#tax saving
Korea's 2026 Dividend Separate Taxation — How Much Tax You Save vs. Comprehensive Taxation
Finance2026-06-11 · 11 min read

Korea's 2026 Dividend Separate Taxation — How Much Tax You Save vs. Comprehensive Taxation

From 2026, dividends from high-payout Korean listed companies can be taxed separately at a flat rate instead of being folded into comprehensive income tax. Who qualifies (a 40% payout ratio), the 14–30% rate table, and worked examples of when it pays off — a temporary rule for 2026–2028.

#dividend separate taxation#high-dividend stocks#value-up Korea#dividend tax#financial income tax#tax saving
Korea's 2026 ISA Overhaul — Should You Wait for the New ISA Accounts?
Finance2026-06-10 · 9 min read

Korea's 2026 ISA Overhaul — Should You Wait for the New ISA Accounts?

Korea's 2026 ISA reform: the new National Growth ISA, Youth ISA, and proposed 5M KRW tax-free limit — what's confirmed vs. still proposed, and whether to wait.

#ISA#National Growth ISA#Youth ISA#tax#2026 reform
Dividends vs Homemade Dividends: Who Wins on Tax at ₩10M/Month?
Finance2026-06-07 · 10 min read

Dividends vs Homemade Dividends: Who Wins on Tax at ₩10M/Month?

Dividends vs homemade dividends: which is taxed less for ₩10M/month of retirement income? Korean vs US stocks under financial income, 22% schedular, and 2026 separate tax.

#dividends#homemade dividends#tax#US stocks#separate taxation
Korean Financial Income Tax: The 20 Million Won Threshold Explained (2026)
Finance2026-06-01 · 9 min read

Korean Financial Income Tax: The 20 Million Won Threshold Explained (2026)

When yearly interest and dividends exceed 20 million won, the excess is taxed at progressive 6-45% rates. A 2026 guide to brackets, health insurance rules, and ISA strategies.

#financial income tax#dividend tax Korea#comprehensive taxation#health insurance dependent#ISA#income tax
How to Build a Monthly Dividend ETF Portfolio for Steady Cash Flow (2026)
Finance2026-06-01 · 9 min read

How to Build a Monthly Dividend ETF Portfolio for Steady Cash Flow (2026)

Build a monthly dividend ETF portfolio by staggering SCHD, JEPI, JEPQ, DIVO, and Realty Income (O) to fill every month, with 2026 yields, schedules, and the 15% US tax.

#monthly dividend ETF#dividend portfolio#SCHD#JEPI#cash flow investing
Korea Retirement Pension DC vs DB: Which to Choose (2026)
Finance2026-06-01 · 12 min read

Korea Retirement Pension DC vs DB: Which to Choose (2026)

Korea's DB vs DC retirement pension: who manages the money, who keeps the returns, how to choose by wage growth vs investment return, plus conversion and IRP transfer rules.

#retirement pension#DC plan#DB plan#IRP#severance pay#Korea
VOO vs QQQ in 2026: Which Should Korean Investors Buy (or in What Ratio)?
Finance2026-06-01 · 11 min read

VOO vs QQQ in 2026: Which Should Korean Investors Buy (or in What Ratio)?

VOO (S&P 500) vs QQQ (Nasdaq-100) for Korean investors in 2026 — expense ratio, sector concentration, 10-year returns and drawdown, and the 22% overseas-ETF tax, with picks by risk, a DCA scenario, and a common-mistakes checklist.

#VOO#QQQ#S&P 500#Nasdaq 100#overseas ETF#capital gains tax
Pension Savings vs IRP — Same Tax Credit, So Why Both?
Finance2026-05-26 · 11 min read

Pension Savings vs IRP — Same Tax Credit, So Why Both?

Pension Savings caps at ₩6M, IRP at ₩9M (combined). Same credit rate — but eligibility, early withdrawal, assets, and fees differ. A worked-example guide for Korean employees.

#pension savings#IRP#tax credit#Korea#retirement
5 Strategies to Maximize Your Korea Year-End Tax Refund (2026)
Finance2026-05-26 · 12 min read

5 Strategies to Maximize Your Korea Year-End Tax Refund (2026)

The average '13th-month paycheck' is around ₩700~800K — but with the right combo of IRP, debit cards, medical, donations, and spouse allocation, you can push it into the millions.

#year-end tax#tax#Korea#IRP#pension savings
SCHD vs JEPI vs JEPQ — Dividend ETF Comparison 2026
Finance2026-05-06 · 12 min read

SCHD vs JEPI vs JEPQ — Dividend ETF Comparison 2026

Dividend growth vs. high-yield covered calls. A direct comparison of SCHD, JEPI, and JEPQ on yield, expense ratio, strategy, volatility, and taxes using official fact sheets — plus after-tax monthly income on a 100M KRW position and which investor each ETF suits.

#SCHD#JEPI#JEPQ#dividend#ETF
The Compound Magic: ₩1M Monthly for 30 Years
Finance2026-04-27 · 11 min read

The Compound Magic: ₩1M Monthly for 30 Years

How interest-on-interest changes everything. A 30-year simulation that includes Korean tax and inflation, worked out in real numbers.

#compound#investing#FIRE
Is FIRE Possible in Korea? The Limits of the 4% Rule and Real Scenarios
Finance2026-04-22 · 13 min read

Is FIRE Possible in Korea? The Limits of the 4% Rule and Real Scenarios

Housing, medical bills, health-insurance premiums, children's education. Where the American FIRE formula breaks in Korea—plus years-to-retire by savings rate, target assets by FIRE type, and what Korea's 2026 tax reform bill changes for withdrawal strategy.

#FIRE#retirement#investing#health insurance#4% rule