Does the NHS say to start cloth at six months?

No. NHS pages set change frequency and a ~4,500 lifetime note. They describe how to put on cloth or disposable nappies. The six-month start is a parent timing choice, not an NHS schedule.

I used disposables for nights only. How do I adjust?

Count remaining daytime changes at the NHS 6–8 band and keep nights on the pack price you still pay. The kit can be smaller than Which?'s 15–25 full-time range if cloth is part-time.

Is the leftover Aldi figure of about £230 official?

No. It is 7 changes × 548 days × 6p from a dated Size 4 listing. Change the pence, the daily rate or the potty date and the leftover moves. That is the point of the test.

Does starting later help the environment if not the wallet?

Which? summarises the 2023 Defra assessment as: reusables have lower global-warming potential than disposables over 2.5 years when washed and dried carefully, and a second child lowers that impact further. A late start shortens the reusable use phase, so the environmental amortisation is also thinner. That is not a £ verdict.

Guides · Nappies · Cost

Is starting cloth nappies at six months still cheaper?

Updated 10 September 2026 · Checked 10 September 2026 · By MayTally research desk — Checked against official UK sources

Why does a six-month start change the payback?

Retailer copy amortises a kit from birth to potty. Many UK parents start after meconium and newborn sizes. The kit is the same size of cash. The remaining disposable packs are fewer. NHS change rates drop from 10 to 12 a day for young babies to 6 to 8 later, so the months you skipped were the high-frequency ones.

This is not a newborn-kit shopping list, a types guide, or a hire catalogue. It is remaining usage versus a kit you have not yet bought.

How many changes are left after six months?

NHS Best Start says you may change as many as 4,500 nappies before potty training. That is a lifetime ceiling, not a monthly invoice. WRAP (2015) used 4,000 to 6,000 disposables per child. Neither source splits the 4,500 at the six-month mark.

Swipe sideways for the full table

Worked change-counts using NHS daily bands (not an NHS two-stage table)
Band (NHS daily rate)	Days in a 6-month block	Worked changes in that block	How to read it
Young baby 10–12/day — first half year you already bought	About 182	About 1,820–2,180	These packs are sunk if you start at six months
Older baby 6–8/day — example next 12 months	365	About 2,190–2,920	This is the disposable bill cloth still has to beat
Older baby 6–8/day — example months 18–30 (to 2.5 years)	365	About 2,190–2,920	Only if potty training sits near 2.5 years
NHS Best Start lifetime note	Birth to potty	As many as ~4,500	Use as the cap, not as 4,500 − 2,000 = official remainder

Daily rates from NHS newborn and Best Start pages, checked 10 September 2026. The 4,500 figure is "as many as" before potty training, not a precise model. Adding the worked blocks can exceed 4,500 — that is why the lifetime figure is the cap, not a sum of invented months. WRAP 2015 used 4,000–6,000 disposables per child.

A late start drops the remaining pack count and keeps the kit price. That is why mid-range cloth versus supermarket own-brand on one child is the tight case.

How do I test whether a late start is still cheaper?

Write the kit you would buy now Which? (February 2026) says around 15 to 25 reusables for full-time use. You may need fewer if you still mix in disposables. This is not a newborn size list.
Estimate remaining disposable spend Remaining months × NHS 6–8 changes/day × the pence on the packs you actually buy. Date Aldi or branded prices. Do not invent a 2026 national pack rate. MoneyHelper's £1,000 is leading-brand over a full 2.5 years from birth.
Add leftover laundry, not a birth-to-potty laundry total Washes left × labelled kWh × Ofgem / bill unit rate (26.11p or 26.32p/kWh on the published Direct Debit averages) + metered water + detergent. Which? wash rhythm: every two to three days.
Compare kit + leftover laundry with leftover packs If kit + laundry is lower, late-start cloth is cheaper on money for that child. If you would have bought Mamia, the leftover pack pile is smaller than a branded pile — see Mamia break-even.

What does a worked late-start comparison look like?

Swipe sideways for the full table

Illustrative remaining 18 months (age 6–24 months) — examples only
Line	Worked assumption	Worked cash
Remaining changes	7/day (inside the NHS 6–8 band) × 548 days	About 3,840 changes
Leftover Aldi-type packs	3,840 × 6p (size 4 listing on aldi.co.uk, 10 September 2026)	About £230 of nappies, before wipes
Leftover branded-type packs	3,840 × 18p (size 3 Pampers cell on a May 2023 retailer sheet — dated)	About £690 of nappies, before wipes
Leftover laundry electricity	18 months of every-other-day washes (about 274) × 0.85 kWh × 26.32p	About £61
Kit still to buy	Your receipt; Which? 15–25 nappies	Often the line that decides versus Aldi

Change-count uses the NHS older-baby daily band, not an official 18-month table. 6p is the dated Size 4 unit pence on Aldi UK on 10 September 2026. 18p is a May 2023 Nappy Lady Tesco Pampers size 3 cell — a dated example, not a 2026 shelf price. Electricity uses an example 0.85 kWh and the Ofgem October–December 2026 Direct Debit average. This table is a method, not a forecast.

Read the table as a test: a £250 kit + £61 electricity + water/detergent already sits near £230 of leftover Mamia-type packs. A £100 value kit still has room. Versus a £690-scale branded leftover, even a mid kit can look cheaper. Two children, or a stash you already own, changes the kit line — see second child.

When is a six-month start not cheaper on one child?

Mid or high kit versus Aldi Mamia, one child, line-dry or not — leftover packs may not cover the stash.
Tumble-drying most loads — add dryer kWh × Ofgem pence. That add-on is the same late as early.
Potty training soon after you start — fewer remaining months, same kit.
You already spent the newborn disposable year at branded prices — those pounds cannot be clawed back; only the remaining months count.

In shortA six-month start is a remaining-months test. NHS 6–8 changes a day and ~4,500 lifetime changes are the usage sources. Branded leftovers still often cover a kit; Aldi leftovers on one child often do not cover a mid stash.

What should I not treat as part of this answer?

A newborn kit shopping list, types explainer or hire walkthrough.
A claim that late-start cloth is always cheaper.
US or Australian change charts priced in other currencies and other tariffs.
A 2026 invented remainder of exactly 2,500 changes.

Questions parents ask

Does the NHS say to start cloth at six months?: No. NHS pages set change frequency and a ~4,500 lifetime note. They describe how to put on cloth or disposable nappies. The six-month start is a parent timing choice, not an NHS schedule.
I used disposables for nights only. How do I adjust?: Count remaining daytime changes at the NHS 6–8 band and keep nights on the pack price you still pay. The kit can be smaller than Which?'s 15–25 full-time range if cloth is part-time.
Is the leftover Aldi figure of about £230 official?: No. It is 7 changes × 548 days × 6p from a dated Size 4 listing. Change the pence, the daily rate or the potty date and the leftover moves. That is the point of the test.
Does starting later help the environment if not the wallet?: Which? summarises the 2023 Defra assessment as: reusables have lower global-warming potential than disposables over 2.5 years when washed and dried carefully, and a second child lowers that impact further. A late start shortens the reusable use phase, so the environmental amortisation is also thinner. That is not a £ verdict.

Sources

Official pages first. If this page and the official page disagree, the official page wins.

NHS — How to change your baby's nappy (10–12 / 6–8 a day) — checked 10 September 2026
NHS Best Start — Changing a nappy (~4,500 changes) — checked 10 September 2026
Which? — Are reusable nappies worth it? — checked 10 September 2026
WRAP — Real nappies overview (4 March 2015) — checked 10 September 2026
Ofgem — Energy price cap unit rates and standing charges — checked 10 September 2026
Aldi UK — Mamia nappies size 1 (dated unit pence context) — checked 10 September 2026
The Nappy Lady — Do reusable nappies really save you money? (dated Pampers cells) — checked 10 September 2026

This is information, not a guarantee of any payment, and not medical, legal or product-safety advice for your home. Prices and rules change; figures carry the date they were checked. Recall status comes from official records only — a product we cannot find is not a safety all-clear. Tell us if we got a fact wrong.