Real Estate
Replacement Reserve Planner
Every major component, the year it dies, and what to set aside each month
What it does
Inside the workbook.
Roof, HVAC, water heater. They all die eventually. This is the month they do.
WHAT YOU GET
- A 5-tab workbook: START HERE · ASSET REGISTER · RESERVE PLAN · WHAT IS DUE · FAQ
- 2 charts that update themselves as you type
- Realistic example figures already filled in, so you can watch it work before you replace them
- A plain-English START HERE guide built into the file, plus a 11-question FAQ
WHY THIS ONE
- Works in FREE Google Sheets. Also opens in Excel. No add-ons.
- One-time purchase. No subscription, no account, no upsell.
- Nothing connects to your bank or your software. You type the numbers in yourself.
- Input cells are unlocked and formulas are protected so a stray paste cannot break the math — and there is NO password, so you can unlock and change anything.
- Every formula was opened in a calculation engine, fully rebuilt, and checked against values worked out independently of the file. If one disagreed, it would not be on sale.
HOW IT WORKS
1. Download and open the file. Nothing to unzip.
2. Read the START HERE tab — about two minutes.
3. Type your numbers over the examples in the blue cells.
GOOGLE SHEETS
File > Import > Upload > choose the file > Replace spreadsheet. No XLOOKUP, no LAMBDA, nothing that breaks on import.
INSTANT DOWNLOAD
Available immediately after purchase under Purchases and Reviews. Nothing ships.
REFUNDS AND SUPPORT
Instant digital downloads cannot be returned automatically through Etsy. Message me — if something is broken or not what you expected, I will fix it or refund you.
AI DISCLOSURE
This workbook was built with AI assistance. Every formula in it was then opened in a calculation engine and tested against independently calculated values before it was listed. The math is checked, not assumed.
This is a digital file only. No physical item will be shipped.
The proof
Every figure, worked out twice.
Before this workbook was listed it was opened in a calculation engine, rebuilt, and every headline figure was compared to a value computed independently in code from the same seed inputs. This is an excerpt of that ledger.
- BuildGenerated from a written spec, opened in a calculation engine, fully rebuilt.
- RecomputeEach figure worked out again in code — never read back from the sheet.
- CompareCell by cell, to a stated tolerance. One disagreement and it does not go on sale.
| Sheet | Cell | Expected | Calculated | Figure | |
|---|---|---|---|---|---|
| RESERVE PLAN | F5 | 3,467.74 | 3,467.74 | ✓ | SET ASIDE EACH MONTH |
| RESERVE PLAN | F6 | 41,612.93 | 41,612.93 | ✓ | Which is, per year |
| RESERVE PLAN | F7 | 12 | 12 | ✓ | omponents counted |
| RESERVE PLAN | F8 | 79,658 | 79,658 | ✓ | Replace all today |
| RESERVE PLAN | F9 | 98,049.42 | 98,049.42 | ✓ | Replace all when due |
| RESERVE PLAN | F12 | 12,800 | 12,800 | ✓ | Rule of thumb |
| RESERVE PLAN | F13 | 28,812.93 | 28,812.93 | ✓ | Rule-of-thumb gap |
| RESERVE PLAN | F14 | 58.3% | 58.3% | ✓ | Reserve as share of rent |
Questions
Before you buy.
Will it work in free Google Sheets?
Yes. File > Import > Upload > choose the file > Replace spreadsheet. Every formula was written to run in both Google Sheets and Excel — no XLOOKUP, no LAMBDA, no dynamic arrays, no add-ons and no subscription.
Why can't I type in some cells?
Those are formulas, locked so a stray paste cannot break the math. There is no password. Review > Unprotect Sheet in Excel, or Data > Protected sheets and ranges in Google Sheets, opens the whole thing if you want to change something.
The monthly number is enormous. Is it broken?
Check the overdue count first. Anything overdue gets divided over one year rather than its remaining life, because it is due now — so a single overdue roof can double the monthly figure on its own. That is the correct answer, not a bug. Deal with the overdue item and the number falls back into a range you can live with.
I do not know when something was installed.
Estimate, and write the guess in the notes so you remember it was a guess. An approximate install date produces an approximate year and a roughly right monthly number. A blank row produces nothing at all, which is strictly worse.
What counts as a component?
Anything big enough that paying for it out of one month's rent would hurt — roughly $500 and up, with a predictable life. Do not list light fixtures or faucet washers. Do list short-life items like seal coating and carpet; they are the ones people leave off and then act surprised about.
Does it work in free Google Sheets?
Yes. Every workbook is built with an older, universal formula vocabulary so it imports into free Google Sheets without add-ons, and it opens in Excel as well. You get both in one purchase.
How was it tested?
The workbook was opened in a calculation engine, fully rebuilt, and 40 figures were compared to values worked out independently in code from the same seed inputs. One disagreement would have stopped the release. An excerpt of that ledger is on this page.
Get it
Replacement Reserve Planner — $19.99
Instant download on Etsy. Google Sheets and Excel versions in the same purchase. No subscription, ever.
Educational estimates only. These calculators and workbooks do the arithmetic on the figures you enter; they are general-purpose tools, not financial, investment, tax, legal, lending, insurance or construction advice, and no result is a quote, an offer, or a guarantee of any outcome. Results depend entirely on your inputs and assumptions. Verify anything you intend to rely on with a licensed professional — a CPA, attorney, lender, licensed contractor, or your own agent. WorkbookBarn and Marcos Gil accept no liability for decisions made using these tools. Marcos Gil is a licensed Kentucky real estate agent (License No. 296259) and is not a lender, CPA or attorney.