Few trades see pricing swing as dramatically as plumbing — a routine tap replacement might be £80, while a burst pipe at 11pm on a Sunday can be £250 or more. However your pricing structure works, every payment you receive counts identically towards your MTD qualifying income. There's no special category for emergency, weekend, or out-of-hours premiums; they're simply part of your total self-employment income for the year.
Whether you're fitting a replacement part on a call-out or supplying and installing a full boiler, your qualifying income is the full invoice total, parts and labour combined, before deducting what you paid your supplier or merchant. What you spent on parts and materials is claimed back separately as a business expense, reducing your taxable profit but not your gross qualifying income.
Plumbers who also work as CIS subcontractors on larger construction or renovation projects follow the same gross-income rule as any CIS trade: your qualifying income is based on your invoiced amount before the contractor's CIS deduction, not your net take-home after tax is deducted at source.
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No, however dramatically your pricing varies by urgency or time of day, every payment counts identically towards your qualifying income.
It's the full amount you invoiced the customer, including parts. What you paid your merchant or supplier is claimed back separately as a business expense, reducing your taxable profit but not your gross qualifying income.
Yes, all self-employment income combines into one qualifying income figure, whether it came from direct customer call-outs or CIS subcontract work, though CIS income is assessed on the gross amount before deduction.
Yes, professional registration and renewal fees required for your work are a normal allowable business expense.
Either is allowed, but you need to pick one method per vehicle and stick with it consistently for that vehicle.