When it comes time to sell your home, most homeowners find themselves in an uncomfortable situation: they know they’ve spent significant money improving the property over the years, but they can’t actually prove it. Receipts are missing, contractors have changed numbers, and half the projects happened so long ago that the details are fuzzy. The result is money left on the table, either at the negotiating table or on their tax return.
Why It Matters for Taxes
The IRS allows homeowners to increase their cost basis by the amount spent on capital improvements. This directly reduces your taxable gain when you sell.
Here’s a concrete example. You bought your home for $400,000. Over ten years, you spent $50,000 on qualifying improvements: a kitchen remodel, a new roof, and a bathroom addition. You sell for $550,000. Without documentation, your taxable gain is $150,000. With proper records, your cost basis is $450,000 and your taxable gain drops to $100,000. That $50,000 difference matters a lot depending on your tax bracket and whether you exceed the $250,000/$500,000 exclusion for primary residences.
The key phrase is “qualifying improvements.” The IRS distinguishes between improvements that add value or extend the life of a property and ordinary repairs that simply maintain its current condition.
Improvements vs. Repairs
This distinction trips up a lot of homeowners. An improvement raises your cost basis; a repair generally does not.
Improvements include things like a kitchen remodel, bathroom addition, new roof, central air conditioning installation, adding a deck or fence, replacing windows, and finishing a basement. These add value, extend the property’s useful life, or adapt it to a new use.
Repairs include fixing a leaky faucet, patching a hole in the wall, replacing a broken window pane, or repainting. These maintain the property in its current condition but don’t add lasting value.
There are edge cases. Replacing a roof is an improvement; fixing a few shingles is a repair. When in doubt, consult a tax professional, but the general principle is whether the work adds lasting value versus simply maintaining what was already there.
What to Keep
The documentation burden is on you. If you’re ever audited or a buyer challenges your claimed improvements, you need evidence. Keep the following for every project:
- Contractor invoices with itemized work and total cost
- Receipts for materials if you did any work yourself
- Permits pulled for the project (these are public record, but having your own copy is easier)
- Before and after photos with timestamps
- Dates the work started and finished
- The name and contact information for any contractors involved
For larger projects, bank statements or canceled checks can corroborate the amounts. Some homeowners also keep the original contracts, though invoices usually suffice.
The Problem with Shoeboxes and Spreadsheets
Most people’s current system is either a literal shoebox of receipts or a spreadsheet they update inconsistently. Both fall apart over time. Paper gets lost, water-damaged, or thrown out during a move. Spreadsheets don’t have any of the actual documentation attached, so you have a number without proof. Photos live in your camera roll with no connection to the project they document.
When you need to produce this information, it’s often under pressure: during a tax audit, during a sale negotiation, or when a contractor needs to know what was done before. That’s not when you want to be reconstructing records from memory.
A Better Approach
The solution is to capture documentation at the time of the project, while details are fresh and receipts are in hand. Create a record for each project that includes the scope, the cost, the date, the contractor, and the supporting files attached directly to that record.
Tools like Raftermath let you attach receipts, photos, and contractor details to each project so everything is searchable when you need it. Whether you use a purpose-built tool or a well-organized folder structure, the important thing is doing it consistently from the start. Every project, every receipt, every photo, filed when the work is done, not years later when you’re trying to remember what that contractor’s name was.
Your future self, at closing or at tax time, will thank you.