How to Avoid Underbidding a Painting Job

Quick answer: Underbidding is almost never a math mistake. It is a scope you did not see or did not write down, plus costs you never loaded into your rate. Fix it by walking and documenting scope in detail, building a burdened hourly cost that includes taxes, insurance, vehicles, equipment and admin time, and running a pre-submit review on every bid. Check your quantities against the paint calculator before you send anything.

Every painter who has been in business more than a season has taken a job that felt fine on paper and bled money in the field. The instinct afterwards is to blame the arithmetic, or the crew, or the customer. Usually none of those are the culprit. The bid was wrong before anyone picked up a brush, and it was wrong in one of exactly two ways.

Either you priced work that was smaller than the work that actually existed, or you priced work correctly but at a rate that never covered what it costs to run your business. Those are different failures with different fixes, and mixing them up is why painters keep raising prices and still feel broke. Deal with them separately.

Root Cause One: Scope You Did Not See or Did Not Write Down

Scope error is the more common of the two and the easier to fix. It happens when the job you priced is genuinely not the job the crew shows up to.

Sometimes that is because you did not see it. You quoted from the doorway instead of walking every room. You never opened the closets. You did not notice the trim was oil based glossy enamel that needs de-glossing before anything sticks. You did not register that a light grey going over a deep burgundy accent wall needs three coats, not two. You never looked up at the stairwell ceiling and worked out how you would reach it.

Other times you saw it perfectly well and never wrote it down. This is the quieter version and it costs just as much, because unwritten scope is scope you cannot charge for later. The customer heard "I will paint the bedrooms" and understood that as including the closets, the ceilings, and touching up the hallway on the way out. You meant walls only. Neither of you is lying. The estimate just was not specific enough to settle it.

Here is the scope that goes missing most often:

• Prep. Washing, sanding, scraping, de-glossing, patching, caulking, priming spot repairs. Prep is the largest single underestimate in the trade because it is invisible in the finished result.
• Second and third coats. Especially on colour changes, on new drywall, and on any deep or vivid colour.
• Ceilings. Assumed in by the customer, assumed out by the painter, priced by nobody.
• Closets, pantries, and utility spaces. Small area, disproportionate labor because of the tight cutting and awkward angles.
• Trim, doors, and windows. Slow, detailed work that eats hours far out of proportion to its square footage.
• Masking and protection. In an occupied, furnished home this can rival application time.
• Touch ups and punch list. The final walkthrough almost always generates a list, and that list takes a real half day on a larger job.
• Cleanup and disposal. Including hauling, plus reinstalling hardware, switch plates, and fixtures.
• Travel and mobilisation. Loading, driving, unloading, setting up, breaking down. Every trip, every day.
• Multiple mobilisations. Coming back because another trade was not finished, because the customer had not chosen colours, or because weather stopped you.

The cure is procedural, not clever. Walk the job in a fixed order with a checklist, and write scope in specific language. Our post on doing a painting job walkthrough lays out the walk order and the condition checklist, and accounting for prep time in a painting estimate covers the biggest of these categories in depth.

Root Cause Two: Costs You Never Loaded Into the Rate

The second failure is more insidious because the job can run exactly as estimated and still lose money. This happens when your hourly rate is really just a wage, dressed up as a business rate.

If you pay a painter a wage and then bill their time at that wage plus a bit, you are not running a business, you are moving money through your bank account. The true cost of an hour of labor includes everything the business spends to make that hour possible. That burdened cost is meaningfully higher than the raw wage, and how much higher varies widely by state, insurance market, and how you are structured, which is exactly why you have to build it from your own numbers rather than copying a figure from the internet.

The costs that commonly get left out:

• Payroll taxes and employer contributions. These sit on top of every wage dollar.
• Workers compensation insurance. Painting classification rates vary enormously by state and by claims history.
• General liability insurance. Plus any bonding or additional insured requirements a customer demands.
• Vehicles. Payments or depreciation, commercial insurance, fuel, maintenance, tyres, registration.
• Equipment. Sprayers, ladders, scaffolding, sanders, drops, brushes and rollers, plus repair and replacement.
• Consumables. Tape, plastic, paper, caulk, spackle, sandpaper, rags, blades. Small individually, meaningful annually.
• Admin time. Answering the phone, scheduling, invoicing, chasing payment, bookkeeping, licensing, marketing.
• Unbilled estimating hours. Every walkthrough you drive to and never win is a real cost carried by the jobs you do win.
• Warranty and callbacks. The return visits you do not charge for.
• Downtime and weather. Paid crew hours with no billable work, rain days, gaps between jobs.
• Training and non productive time. Setup, meetings, supply runs, and the ramp up of a new hire.

Total your real annual overhead, divide it across the billable hours you actually sell in a year (not the hours in a calendar, which is a trap), and you get an overhead cost per billable hour. Add that to your burdened labor cost and you have a break even rate. Only then do you add profit. Our guides on calculating painting labor cost and painting contractor markup percentage walk through the mechanics, and painting business profit margin covers what should be left at the end.

One warning worth repeating: markup and margin are not the same number, and confusing them is a silent form of underbidding. Adding a percentage to your cost produces a smaller percentage of the sale price as profit. Painters who intend a healthy margin and actually apply it as a markup end up meaningfully thinner than they think, on every job, forever.

The Symptoms of Chronic Underbidding

Underbidding rarely announces itself. You do not usually get one catastrophic job. You get a pattern that feels like bad luck for years. Recognising the pattern is the first step.

The win rate one deserves a second look. A very high close rate feels like success and is usually the clearest evidence of underpricing. If nearly nobody says no, your price is not testing the market at all. Losing a reasonable share of bids is normal and healthy. Our post on competing with lowball painting bids covers how to hold a price without matching the cheapest quote in town, and how to raise your painting prices deals with the transition once you realise your numbers have been low.

Track Estimated Hours Against Actual Hours

You cannot fix an estimating problem you are not measuring. The single most valuable habit in a painting business is recording estimated hours per job and comparing them against actual hours, every job, without exception.

Do it by phase if you can: prep hours, application hours, trim hours, cleanup hours. Within a few months you will see exactly where your estimates run light, and it is almost always the same phase every time. Most painters discover their application estimates are close and their prep estimates are badly short. Once you know your personal bias, you can correct for it deliberately instead of hoping.

This is also the only honest source of production rates. Published production rates are a useful sanity check, but your crew, your product, your typical property type and your local conditions determine your real pace. Two competent companies in the same city can differ substantially, so build your own history and price from that.

A Pre-Submit Review Checklist

Before any estimate leaves your hands, spend five minutes on this. It is the cheapest insurance in the business.

1. Have I listed every room or elevation by name, and is anything excluded stated explicitly as excluded?
2. Are ceilings, trim, doors, windows, and closets each individually stated as in or out?
3. Is the coat count stated, and does it reflect the actual colour change?
4. Is the prep scope described specifically, with a limit on what is included?
5. Have I priced furniture moving, protection, and reinstalling hardware, or excluded it in writing?
6. Have I included travel, mobilisation, and the likely number of trips?
7. Does my hourly cost include payroll burden, insurance, vehicles, equipment, and overhead, not just wages?
8. Have I added profit on top of break even, and applied it as markup correctly?
9. Are my material quantities calculated rather than guessed, with a waste allowance?
10. Is there contingency for the unknowns I flagged during the walkthrough?
11. Does the total pass the gut check? If the number feels low for the work, it probably is.
12. Are payment terms, timeline, and the change order process stated in writing?

That last item matters more than it looks. A written change order process is what makes it possible to charge for scope that appears mid job. Our guide on handling change orders on a painting job explains how it works, and estimating paint and material costs covers the quantity side of item nine.

What to Do When You Realise Mid-Job That You Underbid

It will happen anyway. When it does, you have a small number of honest options and one dishonest one to avoid.

First, work out why. If the job grew beyond the written scope, that is a change order, and a specific original scope is what makes it defensible. Raise it immediately, in writing, before doing the extra work. Show the customer what was quoted, what is now being asked, and what it costs.

If the scope did not change and you simply priced it wrong, you generally have to eat it. That is the hard, correct answer. Going back to a customer to ask for more money for the same scope damages trust badly and rarely succeeds. Finish the job properly, take the loss, and write down exactly which assumption was wrong so the next twenty bids are better. A single bad job is tuition. The same bad job repeated for two years is a business model.

If the loss is severe enough to threaten your ability to complete the work safely or pay your crew, that is a different conversation and worth having early and openly with the customer, and possibly with an accountant or attorney depending on the contract. Do not let a bad bid become a walked off job.

What you must not do is quietly cut quality to recover the money. Skipping prep, thinning coats, or skipping a second coat converts a financial loss into a reputational one, and it usually produces a callback that costs more than the original shortfall. The customer paid for what was written. Deliver it.

Build the Habit, Not the One-Off Fix

Avoiding underbidding is not a trick you apply to your next estimate. It is three habits practised continuously: walk and document scope specifically, price from a burdened cost you actually calculated, and compare estimated to actual hours on every single job. Do those and the problem shrinks year over year without any dramatic intervention.

When you are ready to rebuild your process from the ground up, our guide on how to bid a painting job puts the whole sequence in order, from the walkthrough to the signed proposal.

Frequently asked questions

Why do painters underbid so often?

Two reasons dominate. Scope gets missed or left unwritten during the walkthrough, especially prep, second coats, ceilings and protection. And overhead costs like payroll burden, insurance, vehicles, equipment and admin time never get loaded into the hourly rate, so the price covers wages but not the business.

How do I know if I am underbidding?

Look for the pattern rather than one job. Winning nearly every bid, running long on most jobs, having no cash cushion despite being busy, and needing to work on the tools yourself to make jobs pencil are all strong signals. Tracking estimated versus actual hours confirms it quickly.

Should I go back to the customer if I underbid?

Only if the scope changed. If the work grew beyond what you wrote, raise a change order immediately and in writing before doing the work. If the scope is the same and you simply mispriced it, the honest move is to finish as agreed, absorb the loss, and correct the assumption for future bids.

What is the biggest thing painters forget to price?

Prep, consistently. Washing, sanding, de-glossing, scraping, patching, caulking and spot priming take real hours and leave no visible trace in the finished job, which makes them easy to underestimate. Masking and protection in an occupied home is a close second.

Is a high bid win rate a good sign?

Usually not. A very high close rate generally means your price is not testing the market. Losing a reasonable share of bids is normal for a properly priced company. If almost nobody declines, it is worth checking whether your rate covers overhead and profit or just wages.

How much contingency should I add to a bid?

There is no universal figure, and it varies widely by job type and by how much of the property you could actually inspect. The better approach is to reduce uncertainty during the walkthrough, price known conditions specifically, and add a stated allowance for genuinely unknown items such as hidden substrate damage, rather than padding the whole number blindly.