How to Build a $30,000 Rehab Budget That Guarantees a 20% Profit on Your First Flip

Walking into a fixer‑upper feels like opening a mystery box—you see the potential, but the numbers can be fuzzy. I’ve been there, and on Renovation Riches I’ve learned that a solid budget is the difference between a win and a “what‑if.” Below is the step‑by‑step plan I use to turn a $30K rehab into a reliable 20% profit on my first flip.

Know Your Target After‑Repair Value (ARV)

Before you jot down a single dollar, you need to know what the house will sell for after you’re done. That number is your ARV, and it drives everything else.

How to find it:

Look for recent sales (comps) in the same neighborhood—homes that are a
Adjust for differences. If your place has an extra bathroom, add the typical value of a bath in that market (usually $5‑$10K).
Average three to five of those adjusted comps; that’s your ARV.

For a deeper dive on estimating returns, see how to calculate the true ROI on a fixer‑upper before you buy.

On my last Austin flip, the comps averaged $210,000, so that became my target resale price.

Set a Realistic Profit Goal

A 20% profit means you want to walk away with cash equal to 20% of the ARV. Using the Austin example:

Desired profit = $210,000 × 0.20 = $42,000

Now subtract what you’ll spend to acquire the house. If you bought it for $130,000 and paid $5,000 in closing costs, you have:

$210,000 – $130,000 – $5,000 = $75,000

That $75K is the pool for rehab plus profit. Since you need $42K profit, the most you can spend on rehab is $33K. I like to keep a little buffer, so I cap my rehab budget at $30,000. That gives me a cushion for any surprise expenses that pop up.

Break Down the $30K Budget

Core Structural Work (≈ $12,000)

These are the non‑negotiables that keep the house safe and sellable:

Roof repair or replacement
Foundation cracks
Plumbing leaks
Electrical panel upgrade

Skipping any of these will likely cause inspection failures and force you to drop the price later.

Cosmetic Updates (≈ $13,000)

Here’s where you get the biggest visual bang for your buck:

Paint all walls a neutral shade (white or light gray) – about $2,500
New flooring in high‑traffic rooms – $4,500 (replacing outdated flooring on a tight timeline)
Kitchen facelift: refaced cabinets, new countertop, basic appliances – $4,000
Bathroom refresh: new vanity, faucet, and tile in the shower – $2,000

Keep the design simple and timeless. Buyers love a clean, move‑in‑ready look more than the latest trend.

Unexpected Costs (≈ $5,000)

Even the best inspections miss something. I set aside a 10‑15% reserve for hidden mold, pest removal, or surprise permit fees. Having this money in the budget stops you from scrambling later and keeps the project on track.

Get Your Numbers in a Simple Spreadsheet

You don’t need fancy software. A plain Excel or Google Sheet with three columns works fine:

Category	Expected Cost	Actual Cost
Purchase Price	$130,000
Closing Costs	$5,000
Rehab – Structural	$12,000
Rehab – Cosmetic	$13,000
Unexpected Reserve	$5,000
Total Outlay	$165,000
Expected Sale (ARV)	$210,000
Desired Profit (20%)	$42,000

As you spend, fill in the “Actual Cost” column. When the actual stays at or below the expected, you know you’re still on track for that 20% profit.

Shop Smart, Not Cheap

When I need cabinets, I hit the nearest wholesale outlet and pick a “good enough” style—saves about $1,500 without looking cheap. For flooring, I order from a regional supplier that gives a 10% discount on bulk orders. The habit I swear by: compare three vendors before you buy anything. Even a small price drop adds up across dozens of line items. I always reference a step‑by‑step renovation checklist that saves thousands to keep the numbers tight.

Stick to the Timeline

Every extra day the house sits on the market eats into your profit. I plan a 45‑day rehab schedule and work backward from the closing date. Breaking it into weekly milestones keeps everyone focused:

Week 1: Demolition, permit approvals
Weeks 2‑3: Structural repairs
Week 4: Rough‑in plumbing and electrical
Week 5‑6: Drywall, painting, flooring
Week 7: Kitchen and bathroom installations
Week 8: Final touches, cleaning, staging

If a task slips, I shift crew hours rather than stretch the calendar. A tight schedule holds labor costs down and protects your margin.

How I Tested the Formula on My First Flip

Two years ago I bought a 1,400‑sq‑ft cottage for $128,000. After running the ARV calc, I set a $30,000 rehab cap. I followed the breakdown above, kept a $5,000 contingency, and wrapped up in 42 days. The house sold for $210,000, leaving me $42,000 profit—exactly 20% of the ARV.

The biggest takeaway? Discipline. I could have splurged on a high‑end backsplash, but I stuck to the plan. The profit came from staying within the numbers, not from fancy upgrades.

When you walk into a fixer‑upper, remember that the budget is your roadmap. By knowing your ARV, setting a clear profit goal, breaking down costs, and monitoring every dollar, you turn a $30,000 rehab into a reliable cash‑flow machine.