How to Budget for a Home Renovation (Without Losing Track)
Almost every renovation ends the same way. You had a number in your head at the start, the work finished, and now nobody can say what it actually cost. Not because the money vanished — because it left in forty separate payments over five months, mixed in with groceries, fuel, and the usual rent.
A renovation is not monthly spending. It has a start, an end, and a total. Budget it that way and the final number stops being a mystery.
Here is the method, and a template you can copy.
Why renovation budgets fail
Three things go wrong, and they are always the same three.
The money has no boundary. A €400 payment to a tiler and a €400 weekly grocery run look identical in a normal transaction list. By month three you cannot separate “life” from “the kitchen”, so you stop trying.
The spend is spread over months. A renovation crosses four or five monthly cycles. Any tool that resets on the first of the month throws away exactly the number you care about — the running total since the project began.
Nobody plans for the surprise. The wall opens, the wiring is from 1974, and the quote grows by €900. This is not bad luck. It happens on nearly every job, and a budget without room for it is wrong before the work starts.
Step 1 — Set the total you can actually spend
Start from what you have, not from what you want. Take the cash you are willing to put into this project and stop there. That single number is the budget. Everything below is a split of it.
Write it down before you get a single quote. Quotes anchor you, and an anchored number always drifts upward.
Step 2 — Split the total into categories
Five or six categories is right. Fewer and you learn nothing; more and you will not keep it up.
For a kitchen, a normal split looks like this:
| Category | Amount | Share |
|---|---|---|
| Cabinets and worktop | €4,800 | 40% |
| Appliances | €2,400 | 20% |
| Plumbing and electrics | €1,800 | 15% |
| Flooring | €1,200 | 10% |
| Paint and materials | €600 | 5% |
| Contingency | €1,200 | 10% |
| Total | €12,000 | 100% |
The percentages matter more than the euros. If your total is €30,000 rather than €12,000, the same shares hold roughly true for a kitchen. Bathrooms shift toward plumbing. Whole-flat jobs shift toward labour.
Step 3 — Hold a real contingency
Ten percent is the floor. Fifteen is sensible for anything older than about thirty years, and twenty if you are opening walls or touching plumbing you have never seen.
The rule that makes it work: the contingency is not yours to spend. It is not a slush line for a nicer worktop. It exists for the wiring from 1974. If the job finishes and the contingency is untouched, you did not over-budget — you got a €1,200 refund.
Step 4 — Track it as one project, not as monthly spending
This is the step people skip, and it is the one that decides whether you know the final number.
Every payment connected to the renovation goes into one bucket that never resets. Rent, groceries, and fuel stay out of it. At any moment you can answer two questions: how much has gone in, and how much is left.
You can do this with a spreadsheet. It works until the third month, when you are standing in a hardware shop with a receipt and no laptop, and the entry never gets made.
In PennyPulse it is a project:
- Create a project called Kitchen Renovation and give it an icon.
- Set a budget of €12,000 and choose the All time period. This is the important part. All time means the budget never resets on the first of the month — it measures the whole job from first payment to last.
- Log each expense against the project as you pay it, from your phone, in the shop.
The project screen then shows a progress bar with the amount spent, the amount remaining, and a status that changes as you go: ✓ On track up to 60% of the budget, ⚡ Watch it past 60%, and ⚠️ Near limit past 85%.
That threshold at 60% is deliberate. It is early enough that you can still choose the cheaper tap.
Step 5 — Review once a week, by category
Once a week, open the project and look at the By Category breakdown. You are checking one thing: which category is running ahead of its share.
Appliances at 90% of their line in week two is not a crisis on its own — but it tells you the remaining categories now have less room than the plan said. Caught in week two, you change one appliance. Caught in week nine, you are taking the contingency, and then you are over.
A worked example
Kitchen, €12,000 total, six weeks in.
Payments so far: cabinets deposit €2,400, worktop €1,900, oven and hob €1,450, electrician first visit €780, tiles €610, plus €200 of paint and small materials. Total spent: €7,340.
The project shows 61% of €12,000, €4,660 remaining, status ⚡ Watch it.
Now read it by category. Cabinets and worktop are at €4,300 of €4,800 — nearly done, and the fitting is still to be paid. Appliances are at €1,450 of €2,400, with a dishwasher still to buy. Plumbing and electrics are at €780 of €1,800, and the wall has not been opened yet.
The picture is clear enough to act on. Cabinets will overrun by a few hundred euros at fitting. The dishwasher has to come from the cheaper end of the shortlist, not the one you looked at first. Nothing has touched the €1,200 contingency, which is correct at week six — the electrics are the risk, and they are still ahead of you.
That is the entire value of the method. Not the total. The fact that in week six you can see which decision to change.
The template
Copy this and fill in your own numbers:
- Total budget: the cash you are willing to spend, decided before the first quote
- 5–6 categories, each with a euro amount and a share of the total
- Contingency: 10% minimum, 15% for an older property, 20% if you are opening walls
- One project that never resets, holding every renovation payment
- Weekly review of the category breakdown, not just the headline total
- Final number: whatever the project reads when the last invoice is paid
A note on the free plan
The PennyPulse free plan includes one project and unlimited transactions. A renovation is a good use of it — one bounded job, tracked from start to finish, on a plan that costs nothing.
If you want the renovation running alongside Everyday, Travel, or Freelance projects at the same time, that is Premium at €4.99 per month. Either way your data exports to CSV, on every plan, whenever you want it. See the pricing for the details.
One thing worth saying plainly: PennyPulse does not connect to your bank. You enter transactions yourself. For a renovation that is less of a chore than it sounds — you are paying in large, memorable amounts, not forty small ones a week — and it means the number in the app is a number you decided, not one an importer guessed at.
Start with the total
If you take one thing from this: decide the total before you get the quotes, hold a real contingency, and keep every renovation payment in one place that does not reset each month.
New to PennyPulse? Read what it does and how projects work, or create an account and set up your renovation project in about two minutes.
Renovating right now? Tell us how you are tracking it — hello@pennypulse.io or @pennypulse_io.