The Template Logic blog

Financial clarity,
written plainly

Spreadsheet how-tos, personal finance frameworks, and honest takes on money tools. No fluff.

9 articles
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Finance Tips5 min

The Zero-Based Budget That Actually Works When You Overspend

Every zero-based budget tutorial assumes you hit your categories. Real life doesn't work that way. Here's how to handle the month when it all goes sideways.

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How-to6 min

Etsy Fees Explained: The Hidden Costs Most Sellers Miss

Listing fee, transaction fee, payment processing fee, offsite ads — and that's before shipping labels. We break down every Etsy fee and show you where most profit calculations go wrong.

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How-to8 min

KDP Royalties: Why Your Actual Profit Is Lower Than You Think

Amazon shows you a royalty rate. It doesn't show you what you keep after print costs, ads, and returns. This is what a KDP book actually earns per sale.

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Finance Tips9 min

How to Model Rental Income Before You Buy

The deal that looks good on Zillow rarely survives a proper model. Vacancy, maintenance reserves, property management, and taxes reshape the numbers fast. Here's how to run them before you commit.

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Product Updates4 min

FBA Fee Changes: What Amazon Sellers Need to Update in Their Models

Amazon restructured its FBA fee schedule again. If you're using a calculator that hasn't been updated, your margin numbers are wrong. Here's exactly what changed and what to do about it.

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Finance Tips6 min

Quarterly Estimated Taxes for Freelancers: A Simple System

Missing an estimated tax payment costs you money. Overpaying gives the IRS an interest-free loan. This is the system for getting close enough to avoid both.

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Finance Tips5 min

The Sinking Fund Method: How to Never Be Surprised by a Bill Again

Car registration, insurance renewals, annual subscriptions — they're predictable expenses that still feel like surprises. A sinking fund system turns them into planned line items.

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Product Updates7 min

Why Spreadsheets Still Beat Finance Apps for Real Budgeting

Bank sync sounds convenient until it miscategorises half your transactions. Here's why a spreadsheet you control still outperforms an app that learns from you — slowly, and wrong.

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Finance Tips6 min

Portfolio Rebalancing: When Should You Actually Rebalance?

The standard advice is 'rebalance annually.' The real answer is more nuanced — and depends on your tax situation, drift threshold, and whether you have new contributions to deploy.

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