The short version
- A contingency is a planned line item, not an admission that the project will go wrong.
- Size three separate reserves: design changes, construction surprises, and old-house discoveries.
- Keep the money where you can see it, label it, and only release it in writing.
The wall comes open on a Tuesday. Your contractor looks at the framing, then at you, then back at the framing, and says the sentence every remodeler eventually hears: “So, we found something.”
What happens next depends on a decision you made weeks earlier, while you were still picking tile. Either your budget has a contingency line, or it has a hopeful total and a knot in your stomach.
A contingency is a line item, not pessimism
Most budgets get built by adding up what you want and staring at the total until it stops being frightening. The contingency gets left out because it feels like admitting the project will fail. It isn’t. It’s the difference between a project with a plan and a project with a hope.
A contingency is the money that lets you say yes without renegotiating your whole life. When the electrician finds a junction box that shouldn’t exist, you want a number already set aside for exactly this.
The shift that makes it easier to write down: the contingency is not part of what you hope to spend. It’s part of what you’re prepared to spend. If you never touch it, you didn’t waste it. You bought a quiet project.
Three contingencies, not one
A single lump called “extra” is hard to reason about. Three smaller reserves are easier to size, and easier to defend when someone asks why your budget is bigger than the quote.
Design contingency. This covers changes you make after the drawings are done: moving an outlet, adding a window, upgrading the tile you already picked. It’s spent before demolition, it’s entirely in your control, and that makes it the easiest one to drain without noticing.
Construction contingency. This covers what the house does to you: hidden water damage, framing that isn’t where the drawing said, a price that moves between quote and order. It applies once work starts, and only with a written change order.
Old-house contingency. If your house is past the half-century mark, this is the reserve for the specific genre of surprise old houses produce. Knob-and-tube wiring, galvanized pipe at the end of its life, a joist someone notched in 1974 to fit a drain.
| Contingency | What it covers | When it’s spent | Planning range to discuss |
|---|---|---|---|
| Design | Changes after drawings are finished | Before demolition | 5–10% of design and soft costs |
| Construction | Hidden conditions and price movement during the build | Once work starts, by change order | 10–15% of construction cost |
| Old house | Systems and structure that predate the last remodel | As discoveries happen | 5–10% of construction cost, on top |
Those percentages are planning ranges to start a conversation with a builder. They are not averages, not guarantees, and your house gets a vote. A newer townhouse with thorough drawings may need less. A 1920s four-square whose last permit is typed on onion skin may need more.
The point is to pick numbers deliberately and stop treating the reserve as if it were the budget.
Where the money actually hides
Nobody decides to blow a budget. They decide, one small yes at a time, and each yes sounds reasonable on its own.
Scope creep, which never announces itself
The sink moves six inches. Then the outlets have to move with it. Then, since the wall is open, recessed lights seem sensible. Then the faucet has to match the new sink, and the cabinet hardware has to match the faucet. Each decision feels like a few hundred dollars. Twelve of them is a used car.
The defense is boring and it works: every change gets a price in writing before you say yes, so you can see the total while you can still change your mind.
The stuff behind the wall
Water damage, old wiring, a beam that isn’t doing what it appears to be doing, a vent that goes nowhere. Not every wall hides a problem, but the possibility is normal, and a contingency is how normal people pay for it without a crisis.
Living costs during the build
If the kitchen is out, you’re eating out more than you expect. If the only bathroom is out, you may be showering at a gym or a relative’s house. Furniture goes into storage. None of that appears in a contractor’s quote, and all of it appears on your card statement.
The ten percent you forget
Walk this list before you finalize anything. Every item is small. Together they are not.
- Permit fees, plus the re-inspection fee nobody mentions until it happens
- Dumpster delivery, pickup, and the second dumpster for the second load
- Paint, primer, rollers, and the brushes you’ll throw away rather than clean
- Cabinet hardware, hinges, and the jig you buy to install them straight
- Delivery fees, lift-gate fees, and the “inside delivery” upgrade
- Temporary kitchen gear: hot plate, microwave, dish bins, paper plates
- Floor protection, plastic sheeting, and tape by the case
- A storage unit for the furniture from the room
Quote, allowance, change order
These three words decide who pays when something shifts. Learn them before you sign anything.
A quote is a fixed price for a defined scope. It’s only as fixed as the scope is specific. If the quote says “tile selected by owner,” it isn’t finished. It’s a number waiting to move.
An allowance is a placeholder for a choice you haven’t made yet: tile, lighting, a vanity. Spend more and you pay the difference. Spend less and you should get a credit, but ask how it’s calculated, because “unused allowance” and “unused allowance minus restocking” are different numbers.
A change order is a signed amendment that changes the price, the schedule, or both. No signature, no work. Also no signature, no bill. Get it in writing even when it’s small, especially when it’s small.
A worked example, with numbers invented on purpose
None of the figures below are market prices. They’re round, made-up numbers chosen so the arithmetic is visible.
Say the construction subtotal, labor and materials before any reserve, comes to $60,000. You hold a 12% construction contingency, which is $7,200, and a 5% old-house contingency because the house is older than you are, which is $3,000. The working budget is $70,200. You also held $2,500 for design changes; whatever survives that phase rolls into construction.
Now say your cabinets come in at $14,000 against an allowance of $12,000. That’s a $2,000 change order. You sign it, the work continues, and the construction contingency drops from $7,200 to $5,200. Nothing else in the budget moves. You’re annoyed about the cabinets, not about the project.
Two weeks later the electrician finds wiring in the ceiling that has to be replaced before the inspection. The fix is $3,400. You have $5,200, so you say yes and still have $1,800.
Then the stone you picked has a long wait, and the alternative you like better costs $900 more. You have $1,800. You can say yes, or you can say no and keep the money. Either way you’re choosing, not scrambling. That’s the point.
Write it down in one place
| Category | Your number | Notes |
|---|---|---|
| Design and drawings | $ | |
| Permits and inspections | $ | |
| Demolition and disposal | $ | |
| Rough-in: plumbing, electrical, HVAC | $ | |
| Insulation and drywall | $ | |
| Cabinets | $ | |
| Countertops and fabrication | $ | |
| Tile and flooring | $ | |
| Appliances | $ | |
| Lighting, hardware, and paint | $ | |
| Labor | $ | |
| Living costs during the build | $ | |
| Construction contingency | $ | Planning range, decided and labeled |
| Old-house contingency | $ | If your house qualifies as old |
| Total | $ |
The printable version, with room to write, is on the budget worksheet. Print two: one to fill in with a pencil, one clean for your contractor conversation.
Hold it somewhere you can’t spend it
A contingency in your checking account is not a contingency. It’s a balance you’ll negotiate with yourself every time a nice faucet appears.
Move it to a separate savings account and label it. Release money in writing, with the date, the amount, and what it paid for. Recalculate at three checkpoints: after demolition, after rough-in, and after cabinets.
Tell your contractor the budget for the scope, not the size of your reserves. A number you mention casually becomes a number someone plans around.
When you have to use it
Using the contingency is not failure. That’s what it’s for. The discipline is in what you spend it on.
Before you sign any change order, ask three questions. Is this required by code, by inspection, or because the thing is broken? Is this the price, in writing, including any schedule effect? Is there a cheaper way to get the same outcome, even if it’s less elegant?
If the answer to the first question is “not really, but it would look better,” it belongs on a phase-two list, not in the contingency. If you’re less than halfway through the work and more than halfway through the reserve, stop and re-plan. That conversation is cheaper now than in six weeks.
What to do next
Open the budget worksheet and fill in the categories you already know, even roughly, because a budget with gaps beats a budget in your head. Then work through the planning checklist so forgotten costs get caught before they’re invoices. When you’re ready to talk to a builder, the order a kitchen remodel actually happens in tells you which decisions have deadlines.
