MTD for Window Cleaners 2026 — Round Income

Every Payment Method Counts the Same Way

Window cleaning has traditionally been one of the most cash-heavy self-employed trades in the UK, though card payments and apps like GoCardless have taken over a growing share of rounds in recent years. Under Making Tax Digital, it makes no difference how a client pays you — cash left under a mat, a card tap at the door, or a direct debit collected monthly all count identically towards your qualifying income.

The shift matters for record-keeping though. Card and app payments create an automatic digital trail; cash doesn't. If a meaningful share of your round still pays cash, you need your own system for logging it accurately and promptly, since MTD requires digital records kept close to real time, not reconstructed at year end.

Weather-Hit Quarters Don't Change Your Annual Position

A run of bad weather can hit a quarter's income hard — missed rounds, rescheduled jobs, a wet month where you're chasing your own tail trying to catch up. Your MTD quarterly update simply reports what actually happened in that quarter; a low figure from weather disruption isn't a problem to fix, it's just an accurate record. What determines whether MTD applies to you at all is your total income across the full tax year, not any single quarter's ups and downs.

Worked Example

Jordan. Runs a residential window cleaning round of around 180 properties on a 4-weekly cycle, roughly 60% card/direct debit, 40% cash.

Card and direct debit payments (recorded automatically): £19,200
Cash payments (logged manually each round): £12,800
Total qualifying income: £32,000 — above the £30,000 Phase 2 threshold. Jordan joins MTD from April 2027. Because 40% of his round pays cash, he switches to a simple end-of-round logging habit (recording totals the same evening) rather than trying to reconstruct months of cash payments at tax return time.

What You Can Claim

Water-fed pole systems and equipment — usually claimed in full as capital allowances
Van costs — fuel, insurance, servicing, or the 45p/mile simplified mileage rate
Water and purification supplies — deionised water, filters
Ladders and safety equipment — harnesses, roof anchors
Public liability insurance — particularly important given the nature of the work
Round management software or apps (Squeegee, Cleaner Planner, GoCardless fees)
Protective and waterproof clothing

Quick Check

Check Your Round Income

Card / direct debit income

Cash income

Best MTD Software for Window Cleaners

Zoho Books

Free tier available

Free tier works well for combining card, direct debit, and cash income

QuickBooks

From £14/mo

Strong mobile app for logging cash rounds on the go

FreeAgent

From £19/mo

Good if you also invoice commercial clients alongside residential rounds

Software links are affiliate, help fund CheckMyMTD. Recommendations based on ease of use for self-employed income tracking.

Frequently Asked Questions

Does it matter if a client pays me cash instead of by card?

No, for MTD purposes, cash and card payments count identically towards your qualifying income. What matters is that you keep accurate digital records of both, since cash doesn't create the automatic paper trail that card and app payments do.

A bad-weather month tanked my income. Does that affect my MTD status?

No. Your quarterly update simply reports what happened that quarter accurately. Whether you're subject to MTD at all is based on your total qualifying income across the full tax year, assessed from your most recently filed return, not on any single quarter's performance.

Can I claim my water-fed pole system as an expense?

Yes, in most cases the full cost qualifies for the Annual Investment Allowance, letting you deduct it against your profit in the year you buy it, up to a £1 million annual limit.

Do direct debit collection fees (like GoCardless) count as an expense?

Yes, transaction and subscription fees for round management or payment collection software are a normal allowable business expense.

I run two separate rounds under one business. Do I add them together?

Yes, all self-employment income from window cleaning work combines into a single qualifying income figure, regardless of how many separate rounds or areas you operate.