Do Subcontractors Pay 40% Tax? UK CIS FAQ for Construction Subcontractors
10 March 2026•5 min
This FAQ covers what to look for in construction quotes software, which tools are best for estimating and quotations in the UK, and whether you can do accurate estimates from a mobile app. It’s written for busy contractors, builders, and trades who need to price work quickly, protect margins, and keep paperwork tidy.
Frequently Asked Questions
What is the best software for construction estimates?
The “best” estimating software is the one that produces consistent, repeatable estimates with clear labour, materials, plant and overheads—without you rebuilding spreadsheets every time. In the UK, that usually means software that supports:
<ul class="my-4 space-y-2"><li class="ml-4 list-disc list-inside">Cost libraries and templates (e.g., standard rates for blockwork, plastering, first fix)</li><li class="ml-4 list-disc list-inside">Mark-ups, waste factors, prelims and contingency</li><li class="ml-4 list-disc list-inside">Clear breakdowns for clients and for your internal job pack</li><li class="ml-4 list-disc list-inside">Version control (so you can revise without losing the original)</li><li class="ml-4 list-disc list-inside">Easy conversion from estimate to quote, then to job tracking</li></ul>On a typical domestic extension in Leeds, you might be pricing foundations, drainage runs, steelwork, and a kitchen fit-out. Good estimating software lets you build a structured estimate (groundworks, structure, M&E, finishes), apply waste to concrete and timber, and add prelims like skips, welfare and temporary fencing. It also helps you avoid common margin killers—like forgetting scaffold hire for two lifts or under-allowing for cart-away on a strip-out.
SiteSamurai is designed to make this practical: you can create estimate templates for repeatable work (bathroom refurbs, loft conversions, small civils), pull through standard line items, and generate professional quotes quickly. The goal is simple: fewer missed items, faster turnaround, and estimates you can defend when a client asks, “What’s included in that figure?”
Which software is best for quotation?
The best quotation software in construction is the one that helps you send clear, professional quotes fast—then keeps a record of what was agreed. For UK contractors, that typically means:
<ul class="my-4 space-y-2"><li class="ml-4 list-disc list-inside">Branded quote templates with your company details and insurances</li><li class="ml-4 list-disc list-inside">Clear scope wording (what’s included/excluded) to reduce disputes</li><li class="ml-4 list-disc list-inside">Optional/variant line items (e.g., “add underfloor heating”, “upgrade to aluminium bifolds”)</li><li class="ml-4 list-disc list-inside">Digital acceptance (so you’ve got an audit trail)</li><li class="ml-4 list-disc list-inside">Easy amendments and re-issues (Rev A, Rev B) without confusion</li></ul>On site, clarity prevents arguments. For example, a small builder pricing a rear extension in Bristol might include “supply and fit kitchen” but exclude appliances and client-selected tiles. If the quote software forces you to specify inclusions/exclusions and assumptions, you’re less likely to end up absorbing costs when the client expects premium finishes.
Likewise, a subcontractor quoting drylining on a commercial fit-out in Manchester can use proper line items for partitions, MF ceilings, insulation type, access equipment, and working hours restrictions. That makes it easier to justify rates when the main contractor compares tenders.
SiteSamurai supports fast, consistent quoting with structured line items, reusable templates, and professional outputs you can send straight to clients. It’s particularly useful when you’re quoting between site visits—so you can produce a tidy, detailed quote the same day, keep revisions organised, and reduce the back-and-forth that slows down winning work.
Is there an app you can use for doing construction estimates?
Yes—many UK contractors now use an estimating app on mobile or tablet, especially when they’re pricing work straight after a site visit. The key is choosing an app that’s genuinely usable on site (not just a desktop tool squeezed onto a phone). Look for:
<ul class="my-4 space-y-2"><li class="ml-4 list-disc list-inside">Mobile-friendly entry for labour, materials, plant and subcontract packages</li><li class="ml-4 list-disc list-inside">Templates for common jobs (e.g., patios, fencing, bathroom refits)</li><li class="ml-4 list-disc list-inside">The ability to add photos/notes from the site visit</li><li class="ml-4 list-disc list-inside">Offline-friendly workflow (signal can be poor on new builds and basements)</li><li class="ml-4 list-disc list-inside">Quick export to a professional quote you can email/WhatsApp</li></ul>Practical example: a groundworker pricing a driveway and drainage connection in a new housing estate outside Milton Keynes can measure up, note access constraints, and build an estimate with items like excavation, Type 1, ACO channels, soakaway crates, and muck-away. If the app lets them add waste factors and plant (mini digger, wacker plate) there and then, they’re less likely to underprice.
Another example: an electrical contractor quoting a rewire in a Victorian terrace in Glasgow can use a template for points, consumer unit, testing and certification, plus allowances for chasing/plaster making good.
SiteSamurai is built to support quick estimating and quoting while you’re on the move—so you can capture site details, produce consistent estimates using templates, and turn them into clear quotes without waiting until you’re back at the office. That speed helps you respond first (often the difference between winning and losing the job) while still protecting your margin.
Choosing the right construction quotes software comes down to speed, consistency, and protecting your margin with clear scope and accurate allowances. If you want to quote faster, reduce missed items, and present professional estimates and quotations, SiteSamurai can help—book a demo or start a trial to see how it fits your workflow.