Section 01 — Core Systems
The core systems are the practical heart of Safe Harbor. The goal is to build simple systems that make the safer choice the default.
The core systems are the practical heart of Safe Harbor. The goal is to build simple systems that make the safer choice the default.

Most tax advice tells you to “estimate your taxes,” which sounds reasonable until you try to do it and realize you’re basically guessing and trying to hit a moving target. Income shifts, withholding changes, and the rules care not just how much you pay, but when you pay it …
A budget should not require you to become a part-time bookkeeper.
That is the problem with a lot of traditional budgeting advice. It starts with a reasonable goal: spend less than you earn, save for future costs, and make sure your money is going where you want it to go …

Most credit card advice focuses on rewards, but the real problem isn’t earning an extra percent—it’s what happens when a card gets compromised. One breach can trigger a cascade: subscriptions fail, payments bounce, and you’re stuck hunting down every account tied to that number. This system …

This system is about removing decision-making, not adding more of it. Instead of juggling categories, remembering which card earns what, and inevitably defaulting to “good enough,” you lock in high cashback at the places where you already spend the most. By turning Amazon and Walmart into dedicated “suppliers” with their …

Credit card numbers get compromised. Cards get replaced. And when that happens, the real problem isn’t the fraud—it’s the cleanup.
If you’ve ever had to replace a card, you know the drill: figure out which subscriptions were tied to it, log into each account, and update …
This article gives you a simple system for solving two problems that break most financial plans: using targets that don’t keep up with inflation, and expecting yourself to suddenly switch from saving to spending at some arbitrary point in the future.
It does two things. First, it replaces fixed …
This system tells you how much in dividend-producing assets you need to cover your monthly living expenses and close the gap between your expenses and your guaranteed income. Also, this system allows you to estimate how your expenses would change if you moved to a different city and how much …