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Renovation contingency budget

What is the project total after fees and contingency?

Your numbers

$
$
%

Project budget

$67,275

Contingency dollars$8,775
Before contingency$58,500

Tip. 10 to 20% contingency is common. Older homes and anything structural trend higher.

Assumptions

  • Total = (contractor estimate + fees) × (1 + contingency%).
  • The contingency applies to the soft costs as well, since permits and design work overrun too.
  • Excludes the cost of living around the work, such as eating out through a kitchen remodel or renting elsewhere during structural work.

Explore the numbers

Examples and charts

Start with a scenario, then read the response curve to see which input actually moves the answer.

Example 1

Cosmetic refresh

Paint, flooring, and fittings, where surprises are rarer and the contingency can be lighter.

Project budget

$20,350

Example 2

Kitchen remodel

A mid-range remodel with design and permit fees.

Project budget

$67,275

Example 3

Structural work in an older home

Where opening walls reliably finds something, so the contingency has to be serious.

Project budget

$167,500

Sweeps contingency from half to one and a half times your value, holding everything else fixed.

Response curve

How contingency moves the result

Project budget

$67,275

$64k$66k$68k$70k$72k10%15%20%
Chart axis: ContingencyNow 15% → $67k

What this calculates

Adds soft costs and a contingency on top of a contractor estimate, so the number you plan around is the one you are likely to spend.

How to use it

  1. Start with contractor / materials estimate and work down the form, or load an example to begin from a realistic case.
  2. Read the headline result alongside the supporting rows, which show the intermediate figures behind it.
  3. Check the assumptions. They decide what the number includes and, more importantly, what it leaves out.
  4. Sweep contingency on the response curve to see how much it actually moves the answer.
  5. Run a cautious case as well as an optimistic one before using the estimate in a decision.

Common mistakes

  • Spending the contingency on upgrades instead of holding it for surprises.
  • Leaving out permit and design fees because the contractor's quote did not mention them.
  • Budgeting nothing for living costs during the work, such as eating out through a kitchen remodel.

Formula

Total = (base estimate + fees) × (1 + contingency%)

Inputs

  • Contractor / materials estimate
  • Permits & design fees
  • Contingency (%)

FAQ

What belongs in fees?

Soft costs: permits, architectural and design work, engineering, and inspections. They are easy to leave out of a contractor's number because the contractor is not charging for them.

Why is 15% not enough for an older home?

Because a renovation on an older property routinely uncovers wiring, plumbing, or structure that has to be brought up to code once it is exposed. Those are not overruns, they are discoveries, and they are not optional.

What if I do not use the contingency?

Then the project came in under budget, which is a good outcome rather than money you are owed in upgrades. Spending the contingency on finishes is how a project with no cushion left meets its first surprise.

Are these numbers financial advice?

No. They are educational estimates based on the inputs and assumptions on this page. Confirm important decisions with a qualified professional and your own documents.

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