How to estimate painting and decorating jobs in the UK

Why getting your estimate right matters

Underquoting a painting job is one of the quickest ways to lose money in the decorating trade. Get it right and you earn a fair wage for your skill. Get it wrong and you are working for below minimum wage while the customer wonders why you look miserable. There's nothing worse than realising halfway through a job that you've miscalculated and will end up out of pocket. It's a frustrating situation that can also tarnish your reputation with clients.

The challenge is that no two jobs are the same. A 4-bedroom house with low ceilings, good existing prep, and no wallpaper to strip is a very different proposition from a 3-bedroom house with woodchip on every surface, damp patches to treat, and a client who wants a feature wall in each room. As a decorator, understanding these nuances is what sets you apart. It's not just about slapping paint on walls; it's about assessing the unique requirements of each project and pricing them accurately.

Step 1: Measure the job properly

Before you can estimate materials or time, you need accurate measurements. The standard approach for rooms is to calculate the total wall area (perimeter x height), then deduct windows and doors (approximately 1.75 m² per door, 1.5 m² per standard window). Add ceiling area if included. Keep a notebook or use a free app like Canvas or PlanSwift Lite to record measurements on site. It might feel tedious, but getting these details right from the start saves a lot of hassle later.

For woodwork, measure the linear metres of skirting, architrave, door frames, window boards, and bannisters. Each type has a different prep time and paint coverage rate. Skirting typically takes 8 to 12 linear metres per hour to cut in and apply two coats. Remember, different materials and finishes will require different amounts of time and resources, so it's important to be thorough in your initial assessment.

Step 2: Consider additional factors

When estimating, you must also consider factors beyond just measurements. For instance, the condition of the surfaces can significantly impact the time and materials needed. A wall in poor condition will require more prep work such as filling, sanding, and possibly priming. This adds time and cost, which should be reflected in your estimate.

Additionally, the complexity of the job should be evaluated. Intricate mouldings, multiple colours, or decorative finishes will demand more time and precision. It's also worth considering access issues; if a job requires scaffolding or special equipment to reach high areas, this should be factored into your estimate. These factors are often overlooked, yet they play a critical role in how you price your work.

Step 3: Calculate materials

Standard coverage rates for trade paint in 2026:

• Emulsion (mid-sheen or matt): 10 to 14 m² per litre per coat
• Satinwood or eggshell (woodwork): 10 to 12 m² per litre per coat
• Primer/undercoat: 10 m² per litre
• Contract matt (ceiling): 14 to 17 m² per litre

Divide your surface area by the coverage rate and multiply by the number of coats to get litres needed. Add 10% for wastage and touching up. Trade paint brands such as Dulux Trade, Johnstone's, and Zinsser cost more than retail but give better coverage and durability. Budget £15 to £30 per 5-litre tin depending on product type. Selecting the right paint is important; opting for quality materials can save you time and effort in the long run.

Don't forget to calculate other materials like filler, masking tape, and brushes. High-quality tools last longer and provide a better finish, which contributes to customer satisfaction and your professional reputation.

Step 4: Calculate labour time

Experienced decorators use time-based estimating. Rough benchmarks per m² of wall (two-coat, good existing surface):

• Cutting in and rolling walls: 45 to 60 minutes per 10 m²
• Ceiling (two coats, rolling): 30 to 40 minutes per 10 m²
• Woodwork (satin, two coats): 8 to 12 linear metres per hour
• Stripping wallpaper: 45 to 90 minutes per 10 m² depending on type and adhesion
• Filling and sanding: 30 to 60 minutes per room depending on condition

Calculate total hours, then multiply by your daily rate divided by 8 to get hourly rate. A typical experienced decorator charges £25 to £40 per hour or £180 to £280 per day in the UK in 2026. Setting a fair rate is key to maintaining a sustainable business. Ensure your rates reflect both your experience and the complexity of the job.

Account for potential delays such as drying times, which can affect how many areas you can work on simultaneously. Weather conditions, especially for exterior painting, can also impact timelines. Planning for these can help you provide a realistic timeframe to clients, reducing the risk of disputes.

Step 5: Add your markup

Materials should be marked up 15 to 25% over your trade cost. This covers the time spent buying, storing, and transporting paint and sundries. It's part of the service. Do not forget smaller items: dust sheets, masking tape, filler, sandpaper, brushes and roller covers, sugar soap. These add up to £30 to £80 per room on a full repaint. Every penny counts, so ensure these costs are included in your estimate.

Once you have your total, add a contingency of 5 to 10% for unforeseen prep issues. Better to return a small amount to the customer than to ask for more money mid-job. Clients appreciate transparency, and being upfront about potential additional costs can build trust and avoid misunderstandings.

Step 6: Present the quote professionally

A written quote prevents disputes. It should include a clear description of work, number of coats, paint types and colours if agreed, a breakdown of rooms and work types, materials and labour split (or combined if you prefer), payment terms, and what happens if additional prep is found (e.g., damp treatment). Use the free quote generator to produce a professional PDF quote from your phone. Customers take you more seriously with a proper document than a WhatsApp message with a number on it. A professionally presented quote shows you mean business and reinforces your credibility.

Ensure that your terms are clear, especially regarding payment schedules and what happens in case of changes or cancellations. Clear communication upfront can prevent headaches down the line.

Step 7: Follow-up and maintain communication

After sending the quote, follow up with the client to address any questions or concerns they might have. This step is often overlooked but is essential in securing jobs. Clients appreciate prompt communication and it shows your commitment to customer service.

During the project, keep the client updated on progress and any issues that arise. Regular communication helps manage expectations and builds a positive relationship, which can lead to repeat business or referrals.

Common estimating mistakes to avoid

The most common mistakes decorators make when estimating: forgetting to account for prep time on poor surfaces; underestimating the number of coats needed on dark or bare surfaces; not charging for travelling time on larger jobs; forgetting PPE and consumable costs; and not accounting for drying times that affect how many rooms can be worked in a day. Price every job as if it will take slightly longer than you think it will. On the jobs where everything goes smoothly, you make a little extra. On the jobs where it does not, you break even rather than losing money.

Another mistake is not considering the impact of seasonal changes. Cold or damp weather can extend drying times and affect paint performance. Planning for these variables can help you provide more accurate estimates and avoid unnecessary delays.

Building a reputation through accurate estimates

Accurate estimating is not just about protecting your bottom line. It's also about building a strong reputation in the industry. Clients appreciate honesty and reliability. When you consistently provide accurate and fair estimates, you set yourself up as a trustworthy professional. This can lead to word-of-mouth referrals, which are invaluable in the trades.

Invest time in refining your estimating process. Learn from past jobs, adjust your calculations based on experience, and be open to feedback from clients. This continual improvement will not only enhance your business operations but also your standing in the community.