Understanding your result
The headline is the cash saving per hour of your time: what the job pays you, in effect, for doing it instead of hiring. The sub-line gives the cash saving and the hours. The four figures show the quote, the DIY cash cost, the DIY all-in cost (cash plus your time at the value you gave) and the verdict.
The table lays the comparison out: the quote, the DIY cash with the mistakes allowance, the saving, the hours with the allowance, the saving per hour, your time at your rate, the all-in DIY total and the difference between the quote and the all-in figure. The verdict is in the notes with its reasoning, and the quality caveat sits under it.
The two inputs that decide the answer are the hours and the value of your time, and both are yours to be honest about. The painting time calculator gives the hours from the areas and the method; the paint cost calculator gives the materials; and the painter cost estimator supplies a midpoint quote if you have none yet. The break-even guide works through the whole decision with the usual traps.
How we calculate this
The mistakes allowance is applied to both the cash and the hours, because a first-timer’s overrun is in both. The saving per hour is the number that answers the question: it is what you are paid, tax-free, for each hour of your own labour. The verdict uses a margin of 50% above your stated value before it says a clear “DIY”, because the stated value is usually optimistic and the hours usually understated; between the value and 1.5 times it, the result says “lean DIY” and names what would tip it.
The all-in comparison is the same decision from the other side: the quote against the DIY cash plus your time priced at your own rate. If the difference is positive, DIY is cheaper even after paying yourself. The painters’ charges guide explains why the saving is so large (labour is 75 to 85% of a quote) and the production rates guide explains why an amateur’s hours are about half as long again as a professional’s.
The assumptions behind the numbers
| Assumption | Default | Where it comes from |
|---|---|---|
| Professional quote | $1,800 | A one-room-plus quote at the midpoint of published ranges; replace with yours |
| Materials | $250 | Paint and supplies for a large room, from the paint cost calculator |
| Tools | $80 | A ladder rental or an extension pole and tray set |
| Hours | 16 | A 12 × 14 room with ceiling and trim at amateur pace, from the painting time calculator |
| Value of your time | $25 per hour | A round figure near the US median wage; it is yours to set |
| Mistakes allowance | 10% | A fair overrun for a first job; a round figure |
| Verdict thresholds | 1.0 and 1.5 × your value | Site judgement, explained above |
Assumptions last reviewed October 7, 2026.
The calculator does not model the resale of tools, the risk of a fall from a ladder, the cost of a poor finish on a surface that shows it, or the value of a job finished in two days rather than three weekends. It does not know whether the quote and the DIY plan cover the same scope; that is the first thing to check.
Two worked examples
A large bedroom, quoted at $1,800
Paint and supplies $250, a ladder rental $80, 16 hours of your time at $25, 10% allowance.
- DIY cash: ($250 + $80) × 1.10 = $363
- Saving: $1,800 − $363 = $1,437
- Hours: 16 × 1.10 = 17.6
- Saving per hour: $1,437 ÷ 17.6 = $81.65
- DIY all-in: $363 + 17.6 × $25 = $803, so $997 cheaper than the quote even after paying yourself
The verdict is DIY, by a wide margin: the job pays more than three times what the owner said their time was worth.
A small job, expensive time
A $600 quote for a hallway, $250 of materials, no tools, 12 hours at $60 an hour, no allowance.
- Saving: $600 − $250 = $350
- Saving per hour: $350 ÷ 12 = $29.17
- DIY all-in: $250 + 12 × $60 = $970, so $370 dearer than the quote
Hire. A $2,000 quote against $500 of materials and tools and 50 hours at $25, for comparison, pays $30 an hour: lean DIY, and the result’s note on jobs over 40 hours applies.
Where to find your inputs
Quote. A written quote for the scope you would do yourself, or the midpoint from the painter cost estimator.
Materials and tools. From the paint cost calculator; the supplies calculator for the sundries; the rental counter for a ladder or sprayer.
Hours. From the painting time calculator, plus shopping, moving furniture and cleanup. If in doubt, add half.
Value of your time. Your hourly earnings if you would otherwise be working, or what a free weekend is honestly worth to you. There is no right number; there is only your number.
Common mistakes
- Counting only the painting hours. Prep, masking, drying waits and cleanup are most of a DIY weekend.
- Valuing your time at zero. Then every job is DIY, including the ones you will regret.
- Comparing a one-coat quote with a two-coat DIY plan. Match the scope first.
- Ignoring tools. A sprayer rental, a stairwell ladder or a scaffold tower can eat the saving on a small job.
- DIY on the surfaces that show. Cabinets and trim are where the pro earns the money; walls are where you do.
- Forgetting the second weekend. A job that spills over is a job that costs goodwill.
Questions people ask
- How much do I save by painting it myself?
- Roughly the labour, which is 75 to 85% of a quote. On an $1,800 quote with $250 of paint and supplies and $80 of tools, the cash saving is $1,437 after a 10% allowance for mistakes, and at 17.6 hours of work the job pays you about $82 an hour.
- What is the break-even hourly value?
- The cash saving divided by the hours you would spend. If it is more than what your time is worth to you (an hourly wage, or what you would pay to have a free weekend), doing it yourself is the better deal in money terms. If it is less, hiring is. The calculator compares the two and gives a verdict.
- Why an allowance for mistakes?
- Because first jobs take longer and use more paint than planned, through a second trip to the store, a wall that needs a third coat, a drip to sand out. Ten percent on both the cash and the hours is a fair figure for an amateur; set it to zero if you have done this before.
- Does the calculator judge quality?
- No, and it says so in the notes. Walls and ceilings are forgiving and most people get a good result; trim, doors and cabinets show every brush mark and are where a professional's finish is hard to match. Put a higher value on your time for those jobs, or hire them and do the walls.
- What should I count in my hours?
- Everything the painter would do, meaning moving furniture, masking, prep, two coats with the drying time in between, cleanup, and the trips to the store. The painting time calculator estimates the painting part; add the rest honestly, because underestimating the hours is the usual way DIY looks better than it is.
- What should the quote include?
- The same scope you would do yourself, with the same surfaces, two coats and the same prep. A cheap quote for one coat and no prep is not comparable with a careful DIY job. The quote-reading guide lists what to check.