Emergency Boarding-Up and Scheduled Replacements Both Count
Glazing work splits fairly evenly between emergency call-outs (break-ins, accidents, storm damage needing urgent boarding-up and glass replacement, often at premium out-of-hours rates) and scheduled work (window and door unit replacements booked in advance). Every payment, however urgent or planned the job, counts identically towards your MTD qualifying income.
Glass and Unit Costs Are a Substantial Share of Each Job
Like other materials-heavy trades, your qualifying income is the full invoice amount — glass, sealed units, and framing materials included — before deducting what you paid your glass supplier or merchant. This is worth understanding clearly since glass costs can represent a large share of a job's total invoice value, meaning your gross qualifying income may look considerably higher than your actual margin.
Worked Example
Wren. Self-employed glazier covering emergency call-outs and scheduled double-glazing unit replacements.
Emergency call-outs (gross, including glass and boarding materials): £19,800
Scheduled unit replacements (gross, including glass): £16,400 Total qualifying income: £36,200 — above the £30,000 Phase 2 threshold. Wren joins MTD from April 2027. The glass units he buys from his supplier are claimed as a business expense, but his qualifying income remains the full amount customers pay, both for scheduled work and premium emergency call-outs.
What You Can Claim
Glass, sealed units, and framing materials — claimed at what you paid your supplier
Van costs — fuel, insurance, or the 45p/mile mileage rate
Tools and equipment — glass cutting and handling equipment, usually claimed in full
Public liability insurance
Boarding-up materials kept on hand for emergency call-outs
Software links are affiliate, help fund CheckMyMTD. Recommendations based on ease of use for self-employed income tracking.
Frequently Asked Questions
Does an emergency out-of-hours call-out count differently to scheduled work?
No, however your pricing varies by urgency, every payment counts identically towards your qualifying income.
Is my qualifying income the glass price, or my margin after what I paid the supplier?
It's the full amount you invoiced the customer, including the glass or unit. What you paid your supplier is claimed back separately as a business expense.
My gross income looks high because of glass costs, but my actual profit is much lower. Does that matter for MTD?
No, MTD eligibility is based on your gross qualifying income, not your profit margin, which is worth being aware of given how material-heavy this trade is.
Can I claim boarding-up materials I keep in stock for emergencies?
Yes, materials and consumables kept on hand for your work are a normal allowable business expense.
Do domestic and commercial glazing jobs combine into one figure?
Yes, all self-employment income combines into a single qualifying income figure regardless of whether the client is domestic or commercial.
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