Gini Loh System Tools

Decision tools for your own money

Run the numbers before you commit.

Job offers, equity, leases, relocations, expat tax, laptop repairs — even the espresso machine. Every model runs in your browser: no signup, nothing uploaded.

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SIMULATOR // TCO_WATERFALL
LIVE MODEL
Monthly Value Gain: +$2,400/mo
Upfront Transition Outlay: $12,000

Payback Horizon

5.0 Months

3-Year Net Advantage

+$74.4k

Payback Progression Waterfall Profitable at Month 5
M0 (Outlay)
-$12.0k
Month 3
-$4.8k
Breakeven
$0 OFFSET
Month 5
Year 1
+$16.8k
Year 3
+$74.4k
Open Full Calculator Real-time mathematical model

Deterministic Decision Engines

Quantify compute, supply chain, and agentic workflows

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Portfolio Capital

RSU Hold vs. Sell & Mega Backdoor Roth Simulator

2026 IRS statutory model quantifying employer concentration risk, double-jeopardy exposure, and $72,000 Section 415(c) Mega Backdoor Roth asset allocation.

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Career

W-2 vs. 1099 / S-Corp Net Yield Calculator

2026 IRS statutory model comparing W-2 salary against 1099 Sole Prop and S-Corp entity structures. Models SE tax arbitrage, Solo 401(k) caps, and QBI deductions.

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Portfolio Capital

Secondary Tender vs. IPO Horizon Calculator

Model a private secondary or tender offer against the IPO you are waiting for: after-tax cash today, probability-weighted and discounted exit proceeds, and the break-even IPO price.

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Stack Economics

Build-vs-Buy Amortization Simulator

Compare internal tooling against a vendor on loaded engineering time, the permanent maintenance fraction, infrastructure and renewal escalation, over one discounted horizon.

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Compute Capital

Local Workstation vs. Cloud GPU Break-even

Compute cost per GPU-hour for owned hardware — purchase, power, maintenance and residual value — against on-demand cloud rates at your real utilisation, with the break-even hours per month.

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Personal Capital

Rent vs. Buy with Opportunity Cost

Run an owner and a renter to the same horizon: mortgage amortisation, tax, maintenance and selling costs against a portfolio funded by the down payment and the monthly difference.

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Real Estate

Lease Break Penalty & Offset Estimator

Evaluate your early lease termination exposure. Calculate contract penalty structures, exit fees, and security deposit offsets.

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Career

Job-Hop vs. Retention Compensation Calculator

Compare traditional 3% annual raises vs. strategic job-hops yielding 15-20% bumps, projecting 10-year cumulative earnings.

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Compensation

Total Compensation & Equity Visualizer

Model base salary, cash bonuses, and vesting RSUs or options with stock growth assumptions to evaluate tech offers.

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Personal Finance

Automated Income Waterfall Simulator

Visualize automated account routing: from checking, through retirement matches, HSAs, and index fund allocation.

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Career

Career Relocation Cost & Payback Calculator

Find out how many months of a new salary bump it takes to break even on moving costs, lease breaks, and new deposits.

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Lifestyle

Home Espresso Cost-per-Use Calculator

Determine if investing in a premium home espresso setup beats your daily café runs. Real-time cost-per-use calculator.

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Hardware

Tech Repair vs. Replace Optimizer

Calculate if repairing a 3-to-5-year-old laptop or phone is a smart fix or a financial liability. Uses the adapted consumer 1,500 index rule.

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Software & Ops

Tinkering Tax vs. SaaS Upgrade Calculator

Calculate the hidden tinkering tax of manual workarounds and sheets vs. upgrading to a centralized SaaS platform.

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Career

AI Career Radar

Find out how much of your job AI can already do — 1,000+ careers broken down task by task, plus a simulator for what changing your week would do.

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Global Mobility

Expat Financial & International Tax Evaluator

Compare cash flow and 5-year wealth impact of an international relocation (e.g. US to Spain). Model Beckham Law tax regime, US FEIE/FTC, tax equalization, and FX liability risks.

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CALCULATORS

Calculator Hub

> Lease break, salary velocity, and total compensation calculators you can run without hunting through the archive.

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Filtered Articles

Artificial Intelligence & Future of Work

6 articles

Chronological Archive

Latest Articles

24 Recent Articles
Descending Date • All Articles
Cinematic 35mm photograph of a thoughtful professional in their early 30s standing on a rain-slicked city street at dusk, holding a suitcase in one hand and a smartphone showing a job offer in the oth
Mental Models & Strategy • • 7 min read

Expats: Evaluating the True Value of a Job-Driven Move overseas

For mid-career professionals, moving abroad is no longer a simple salary comparison. Expats must weigh a U.S. $200K tech salary against a €130K European offer, then factor in lower healthcare, education, and daily costs alongside dual-country taxation expats face, visa rules, and hidden relocation expenses. This guide cuts through the noise with a practical framework for expats Costa Rica, expats Germany, and other markets, helping you answer the critical question: is relocating for a job worth it? You will learn how to calculate true net cash flow, anticipate cross-border tax liabilities, and score cities on livability, career momentum, partner employment, schools, and community. The Expat Financial & International Tax Evaluator turns guesswork into a clear, personalized decision. Before you accept the offer, run the numbers, test the lifestyle trade-offs, and protect your long-term wealth. Your next move deserves evidence, not hope.

close-up-view-rich-aromatic-espresso-shot-being-brewed-coffee-machine
Major Purchases & Assets • • 17 min read

Is a $3,000 Espresso Maker Machine Worth It?

For many coffee enthusiasts, the decision to invest in a premium espresso maker machine is clouded by emotion and brand loyalty. A data-driven approach, however, reveals a surprising bottom line. Using the Giniloh Strategic Decision-Intelligence Engine, a detailed cost-per-use analysis of a $3,000 dual-boiler home espresso machine versus daily $6.00 café lattes yields a clear verdict: buy the machine—but only just. Over three years of five weekly drinks, the home setup costs $5.92 per use, saving a mere $60 compared to the café’s $4,680 total. Hidden expenses like beans, milk, descaling, and maintenance push the total cost of ownership to $4,620, making this a borderline decision. The real value emerges when weekly usage increases, tipping the scales toward significant long-term savings. Before you swipe your card, run your own numbers: the difference between a rational investment and a costly impulse is just one calculation away.

My emergency fund
Money & Wealth • • 18 min read

Beyond the Emergency Fund: How to Build a Frictionless Wealth-Protection System

Imagine your checking account drops to $500 after an unexpected car repair—but within hours, an automatic sweep from your savings restores your floor, no manual intervention required. That’s the power of the Giniloh Frictionless Money Flow Simulator, a hands-on tool that lets you practice real-life financial shocks in a risk-free environment. The emergency expense scenario, a core feature, demonstrates how setting a $1,500 checking floor paired with a $15,000 high-yield savings account triggers an automated rescue when an unplanned bill hits. You can run the simulation yourself using AI chat commands or manual UI configuration, then watch the cyan flow path and audit trail log confirm every transfer. This isn’t static advice—it’s a live, repeatable drill that trains your system to protect against financial shocks and avoid high-interest debt, giving you confidence when real emergencies strike.

Looking for the enterprise tools?

Compute, AI stack and supply-chain analysis is now on AIChieve

The GPU TCO Analyzer, the build-vs-buy asset and software calculator, and the paid PRO apps moved to aichieve.net when the two sites split. This site stays focused on decisions you make with your own money.

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