Budget truthfully

Starter guide · 6 min read

How to Build a Rehab Budget and Stick to It.

A flip budget isn't the same as a wishlist. It's a contract you write with yourself before any demolition — line items padded to your worst case, must-do split from nice-to-have, and a weekly re-baseline that catches the swing before it eats the margin.

The skeleton

Line up every category of work before you swing a hammer.

The first draft of a rehab budget starts as a category list — drywall, paint, flooring, plumbing, electrical, HVAC, kitchen, baths, roofing, landscaping. Every category gets a line, every category gets a number, and no category is ever folded into "miscellaneous." A category without a number is the one that costs you money you didn't plan to spend. Walk the property with the category list in hand and write per category before you ever call a contractor.

The padding

Pad each line item to your worst case — not your best.

When a contractor tells you a kitchen is "$8,000 to do", that's the floor, not the middle. Add 25% for the unseen work — the repair behind the wall, the subfloor under the vinyl, the panel swap you avoided mentioning. The line item you underbid is the line item that erodes your margin. Pad each item to your worst-case number, total the categories, and live with the total — it's the one that keeps the margin intact.

The split

Separate "must-do" from "nice-to-have" — and price them both.

Granite counters are a nice-to-have. A new panel box is a must-do. Tag every line item with one of the two labels, then sum them — must-do is the contract floor, nice-to-have is what you fold in if the budget holds. Most first-time flips go over because the nice-to-have list gets priced at zero. Price both; then decide which ones earn the swing.

The overlay

Layer ZIP-local discounts on top of every category.

The big-box quote is the worst-case number. Within a 50-mile radius of your ZIP, builder-supply yards, salvage yards, paint shops, and contractor outlets each hold category-specific discounts that won't show up unless you look them up. Pull the per-category top-end discount and reflect it in a "discounted total" column — that's the number you should actually budget against, not the worst-case total.

The cadence

Re-baseline weekly — not at the end of the project.

A budget you only check at the end of a project is a budget you can't correct. Set a weekly 30-minute re-baseline: actual-to-date vs. plan, scope adds vs. scope cuts, discount applied vs. discount still available. If the swing is wider than 10%, stop, re-write one line of the contract, and re-confirm the margin before next week's draw. The re-baseline is the one habit that keeps a rehab budget working.

Build the budget

Punch in the line items. See the swing from your ZIP.

The Sparboard rehab budget tracker turns drywall, paint, plumbing, and flooring into line items, then layers the per-category top-end discount from the stores within 50 miles of your ZIP on top. You see the raw total and the discounted total side by side — so the budget you write is the one you can keep.

See a sample flip score with the savings overlay →

Budget discipline checklist

  • · List every category; no line item folded into "misc."
  • · Pad each line item to your worst case, not the bid.
  • · Tag must-do vs. nice-to-have; price both.
  • · Layer ZIP-local discounts per category.
  • · Re-baseline weekly — actual vs. plan vs. discount.