UK Registration, Tax & MOT for Your MG T-Series

Every MG T-Series qualifies on age for free vehicle tax and MOT exemption — but neither is automatic. You must apply for the historic tax class, and declare MOT exemption yourself each year. The real question for T-Type owners isn't age; it's whether your car counts as "substantially changed."

Quick reference: where a T-Type stands

Vehicle tax: the historic class

The exemption runs on a rolling 40-year rule, applied from 1 April each year and covering vehicles built before 1 January forty years earlier. Every T-Series car — even the last TF 1500 of 1955 — sits comfortably inside it.

It is not automatic. Many owners assume the car simply stops being taxed; it doesn't, and the bill arrives.

The first application to change the tax class must currently be made at a Post Office — it cannot be started online. Take:

• The V5C log book, in your name
• The V11 tax reminder if you have one
• Either a valid MOT certificate, or a completed V112 exemption declaration

You will receive an updated V5C showing the historic tax class. DVLA typically confirms the change within around ten working days, with the new log book following within about four weeks — and you can keep using the car in the meantime. Any unexpired full months of previous tax are refunded pro rata.

You must still tax the car every year, even at £0 — the rate is nil, the obligation isn't. In later years the renewal can be done online or at a Post Office.

For the definitive process see GOV.UK: Historic (classic) vehicles: MOT and vehicle tax.

MOT exemption and the V112

Since 20 May 2018, vehicles built or first registered more than 40 years ago and not substantially changed in the previous 30 years are classed as Vehicles of Historical Interest (VHI) and are exempt from MOT testing.

Exemption is a declaration, not an entitlement. You complete form V112 ("Declaration of exemption from MOT") at the point of taxing the vehicle, each year. Reason code "R" is the VHI code.

There is a practical wrinkle: when taxing online, post-1960s vehicles are shown a tick box to make the declaration, while pre-1960 vehicles are handled differently. T-Type owners should follow the process appropriate to their car rather than assume.

For the current forms and guidance see GOV.UK: MOT exemption for historic (classic) vehicles and the V112 form.

The substantial-change question

This is the question that actually applies to most T-Type owners, because so many cars have had period-style or sympathetic changes over a long life.

"Substantially changed" is defined by DVSA guidance using a set of specific criteria covering the chassis, axles and running gear, suspension, steering and engine. A car altered in any of those ways within the last 30 years loses exemption and must continue to be tested. The guidance has been updated as recently as March 2026 — please read the current criteria on GOV.UK: substantial change guidance rather than relying on any summary elsewhere.

Applied honestly to the things T-Type owners actually do — each of these is worth checking against the current criteria rather than settled either way:

• Engine changes. A different engine of the same period may be treated differently from a modern unit. An XPAG fitted to a TA is a very common period-style change and exactly the sort of case owners need to assess.
• Five-speed gearbox conversions. A popular usability upgrade — Ford Type 9 or similar — worth checking.
• Axle and brake changes, including modern or uprated components and disc conversions.
• Superchargers. Period supercharging (Marshall, Shorrock, Arnott) was contemporary practice, which may be relevant to how a change is regarded today.
• Suspension and steering alterations. Uprated dampers, telescopics in place of lever-arms, alternative steering boxes.

Changes made to original specification, or in keeping with the period, are generally viewed differently from modernisation — and where the timing of a change matters, documentation helps.

Interactive: does your T-Type need a closer look?

Answer six quick questions about your car's history. This is a prompt to check the current DVSA guidance carefully — not a substitute for it.

Related reading on this site: our XPAG tuning guide, the complete T-Series tune-up, and the chassis and engine number identification guide.

Registration: what your V5C should show

Before worrying about anything else, check the log book itself. On a T-Type's V5C look for:

• The registration mark — the plate the car actually wears
• The chassis (VIN/frame) number matching the number stamped on the car (see the chassis and engine number identification guide)
• The date of first registration — but note the wrinkle below
• The make and model — should read "MG" and, ideally, "TA", "TB", "TC", "TD", "TF" or "TF 1500". Vague entries like "MG Midget" are common and worth correcting.

For a returning import, the front of the V5C may read "Declared manufactured in 19xx" rather than showing a UK first-registration date, because the car was originally sold abroad. That is normal. For tax and MOT purposes, the "date of first registration" for a car originally sold abroad is generally the date it was first registered in the UK — but the substantial-change and VHI tests use the manufacture date, so this is not usually a problem for a T-Type.

Reclaiming an original registration number: the V765 scheme

The V765 scheme matters to T-Types more than to most classics, because so many were exported, laid up or lost their paperwork in the decades before DVLA computerisation.

What it is. The DVLA scheme, introduced after lobbying by the historic-vehicle movement, for reuniting a vehicle with its original UK registration mark where that mark is no longer live on DVLA records. Typically: a car that was off the road for decades, or exported and later returned, or dormant since before computerisation in the early 1980s.

What you need. Documentary evidence from before 1983 linking the registration mark to the chassis number. Any of:

• An original buff log book (RF60 or VE60)
• Period council or local-authority registration archive records
• Period photographs clearly showing the plate and identifiable features of the car
• Correspondence, receipts or MOT certificates from the period

Send copies where possible; originals get lost.

Club endorsement is mandatory. The application must be signed and endorsed by an owners' club on DVLA's V765/1 list of authorised clubs. A club representative confirms the vehicle's identity and chassis number, usually by physical inspection. Check the current V765/1 list on GOV.UK and approach the appropriate MG club — clubs may charge a processing fee and can have waiting lists in busy periods.

The forms:

Manage expectations honestly. If the evidence does not establish a positive link, DVLA will issue an age-related mark instead — and that is not a failure. Importantly, accepting an age-related number does not prevent you reclaiming the original later if better evidence emerges.

Age-related marks and Dating Certificates

Where there is no evidence linking a car to a specific original mark, an authorised MG club can issue a Dating Certificate confirming the vehicle's age from its chassis number. Submitted with a V55/5, DVLA then issues a period-correct age-related registration — for example a mark in an "SSU" or "XVS" style series appropriate to the year of build.

Why this matters for a T-Type: a period-correct mark suits the car and supports its authenticity. A Q-plate — issued where age or identity cannot be established — is undesirable, marks the vehicle out as of uncertain provenance, and affects value.

Bringing a T-Type back to the UK

Given that the majority of TDs and a large share of TCs went abroad, returning cars are common.

At a practical level, expect to deal with:

1. Customs and import notification on arrival — an import declaration, and any duty or VAT depending on the car's age and status. Historic vehicles generally attract favourable treatment, but check the current rates.
2. NOVA (Notification of Vehicle Arrivals) to HMRC within 14 days of import.
3. Registration with DVLA — evidence of age and identity (a Dating Certificate is usually essential), a V55/5, and either a V765 to reclaim an original UK mark (if the car was originally sold here) or acceptance of an age-related mark.
4. Tax and MOT — apply for the historic tax class and make the V112 declaration as set out above.

Check the current GOV.UK guidance on importing vehicles before shipping anything, since thresholds and procedures change. Professional import agents handle this routinely and are often well worth the fee.

Evidence: where to get it

The paperwork above all depends on documentation. Practical sources for a T-Type:

• MG factory production records and the MG Car Club T Register, which hold build and dispatch records
• A British Motor Industry Heritage Trust (BMIHT) Heritage Certificate from the British Motor Museum, confirming original build details from the factory records
• Period buff log books, MOTs and correspondence — often found in old wallets, glove boxes and previous-owner packs

See our chassis and engine number identification guide, and the specialists directory for restorers who routinely handle the paperwork side.

A note on insurance

Briefly, and non-promotionally: classic policies are typically written on an agreed value basis rather than market value, and usually come with a limited annual mileage. An agreed value normally requires a valuation letter and dated photographs of the car. Keep those on file with the V5C and any Heritage Certificate.

For a starting point on what your T-Type is worth, see our MG T-Series values and price guide. This is information, not advice, and not a recommendation of any particular insurer.

Related reading

• Chassis & engine number identification — matching the numbers on your car to the V5C
• MG T-Series values & price guide — agreed values and market context
• MG T-Series bodywork — ash-framed tubs and steel chassis
• Specialists & suppliers — restorers and paperwork specialists