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How to Budget for a Kitchen Renovation

Kitchen money is the part of the project that people stress about most, because it is the part that is easiest to get wrong and hardest to undo. You can live with a worktop you are not crazy about. You cannot live with a budget that ran out halfway through.

Here is the uncomfortable part: most kitchen overruns are not caused by the big, obvious items. They are caused by the things nobody priced, plus the small “just this one” upgrade that quietly adds up. A budget that holds is not a lucky number. It is a method that accounts for the unknown from the start.

This is that method. Work through it and you will have a budget that reflects what you can actually spend, a place for the surprises, and a way to check the number as the project runs.

Why kitchen budgets blow up

The pattern is almost always the same, and seeing it makes it easier to prevent.

  1. The unknown shows up. The floor needs re-leveling. The plumbing is older than the kitchen. A circuit needs extending. None of it is visible until the units come off. The budget did not have a line for it, so the project borrows from somewhere else.
  2. The “just this one” upgrade. The taps you liked are a little more than the ones you budgeted. The worktop you chose has a more expensive edge profile. Each one is small. Together they move the total.
  3. One change pulls two more. You move the fridge to the other wall. Now the plumbing, the electrical, and a run of cabinets all change. The budget was built around the old layout.

None of this means you spent badly. It means the budget did not leave room for the project to actually happen, rather than the project on paper. That is the gap this method closes.

The five cost buckets

Keep the money in five buckets. It is coarse on purpose: the point is that every dollar has a home, and the surprises have a home too.

1. The build (labour)

The work: demolition, plastering, electrical, plumbing, carpentry, tiling, floor prep. This is where the itemised quote matters most, because it is the biggest source of the unknown. Get it broken into actual jobs, not “refit the kitchen.” If the scope is written down, the number behind it is trustworthy. If the scope is a paragraph, the number is a guess.

2. The units and worktop

The cabinetry, the worktop, and the doors and hardware. For a full kitchen this is very often the largest supply cost, and it is the part you decide early and on purpose, so it is the part you should control. Price it at the showroom or retailer, in writing, before you add it to the budget.

3. Appliances

Very often the second-largest cost, and the one where budgets quietly slip, because it is where people upgrade without thinking. Decide the appliance list early and set a ceiling for it. A written list stops the “while we are here” purchase from eating the contingency.

4. Finishes and soft items

Flooring, tiling, lighting, taps and fixtures, paint, and the small things nobody lists until they are needed. These are individually small, which is exactly why they add up. Give this bucket its own line so it is not silently absorbed into the others.

5. The unknown (contingency)

The buffer for the surprises in bucket one and the creep in buckets two to four. This is not wasted money. It is the difference between a budget that survives a real project and one that survives only on paper.

How to size each number

You do not need to be an estimator. You need three sources, and honesty about which ones are real.

Do not add a total until the big decisions are made. A budget built on “we will pick the worktop later” is not a budget, it is a hope. Decide the worktop, the units, and the appliances first, then the number is real.

The contingency: your insurance against the unknown

This is the single most useful line in the whole budget, and the one most people leave out.

What it is for: the things you cannot see until the work is open (structure, plumbing, electrics), and the changes you cannot predict. Every kitchen has some of this. Older properties and any change to the layout have more.

A common starting point is a buffer of 10 to 20 percent of the total, more if the property is old or the layout is moving. Treat that as a starting point, not a rule: the right size is whatever keeps you calm when the first surprise lands. The important part is not the exact percentage. It is that the buffer exists, and it is spent on purpose.

The discipline that matters: when you take money from the contingency, write down what it was for and how much it was. Then update the number. The contingency should shrink for a reason you can point to, not disappear quietly.

Tracking planned versus actual

A budget is a living number, not a one-time total. The move that keeps it honest is simple and boring, and it is the whole ballgame.

For each of the five buckets, keep two numbers: what you planned to spend, and what you are actually spending. Update the actual as you pay. Then look at the gap between the two.

The gap is the number that warns you early. If actual is running ahead of planned in the build bucket at 30 percent of the project, you can still make the call to hold the line, use the contingency, or change a scope decision. At 90 percent, you are reacting. Watch the gap, not just the total, and you catch problems while they are still cheap.

This is the part the Kitchen Renovation Planner is built around: its budget page keeps planned and actual side by side for each part of the project, and its decision register keeps the choices that move the number in one place. It is a $19 printable PDF, in US Letter and A4, emailed to you after payment. If you only want the tracking part, start with how to track a kitchen renovation in a spreadsheet.

The three budget mistakes to skip

The done-for-you version of this

If you would rather not build the budget yourself, the Kitchen Renovation Planner is a 26-page printable PDF that gives you this method on the page — the five cost buckets as a written budget, a contingency line with room to log every draw, and a planned-versus-actual sheet you can watch as the project runs. It is $19 one-time, in both US Letter and A4, and it is emailed to you after payment.

Get the Kitchen Renovation Planner — $19 one-time →

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FAQ

How accurate does my budget need to be before I start?

Accurate on the big items, and honest about the rest. If the build, the units, and the appliances are priced in writing, your budget is solid. You do not need to predict the exact price of every plug socket. You need the big numbers real and a buffer for the small unknowns.

What is a realistic contingency?

There is no single right number, because it depends on how old the property is and whether the layout is changing. A common starting point is 10 to 20 percent of the total, more for older homes or a moved layout. The point is to have the buffer and to spend it on purpose, logged, rather than to hit a magic figure.

Should the appliances be in the budget?

Yes, and give them their own line with a ceiling. Appliances are often the second-largest cost and the place budgets quietly slip, so keeping them as a separate, capped line is what stops them from eating the contingency.

Do I need a fixed budget before I start, or can I decide as I go?

Decide the big money items first and treat the budget as a plan you check as you go. A budget is not a wall you cannot cross; it is a number you watch. When actual starts to outrun planned, that is your signal to use the contingency, adjust a scope decision, or slow down, and the earlier you see it, the cheaper the fix.