By Vehicle · Audi · A3 35 TFSI S line

Audi A3 35 TFSI S line insurance cost UK 2026

The Audi A3 35 TFSI S line costs an average of around £1,200 a year to insure in 2026, sitting in insurance groups 20–23 — roughly double the UK comprehensive average of about £600 and £150–£250 a year more than the same 150PS engine in Technik or Sport trim. The 35 TFSI is the A3's best-selling powertrain and S line its best-selling trim, so this exact combination is the one most UK buyers actually quote for. Below: premiums by driver age, S line versus every sibling trim, and the levers that genuinely cut the price. For the whole range — 30 TFSI to RS 3 — see the full Audi A3 insurance guide.

Premiums by age → Full Audi A3 guide

Groups 20–23

Thatcham rating, manual & S tronic

£1,200/yr

Average premium, clean 35–49 driver

2× UK average

vs about £600 typical UK comprehensive

Direct Answer

How much does an Audi A3 35 TFSI S line cost to insure?

A clean 35–49-year-old driver on a comprehensive policy pays £1,050–£1,350 a year to insure an Audi A3 35 TFSI S line in 2026 — around £1,200 on average. That is roughly twice the typical UK comprehensive premium of about £600 (the ABI's Q1 2026 tracker put the average paid at £560; Confused.com's June 2026 index put the average quoted at £719 — see our UK car insurance cost index).

The trim sits in insurance groups 20–23 out of 50 (Parkers/Thatcham): manual cars are typically rated 20–22 and the seven-speed S tronic automatic 21–23, with the exact group varying by model year and Tech Pack. Within the A3 family — which spans groups 14–47 and averages £1,196 a year across all trims — the 35 TFSI S line lands almost exactly in the middle: markedly cheaper than an S3 or RS 3, but consistently dearer than the same car in Technik or Sport trim.

The Trim Explained

Why the 35 TFSI S line sits in groups 20–23

The 35 TFSI badge means a 1.5-litre four-cylinder turbo petrol with 150PS, cylinder-on-demand tech and 0–62mph in around 8.1 seconds — brisk, not fast. It comes with a six-speed manual or the seven-speed S tronic; automatic cars add a 48-volt mild-hybrid system. Crucially, every 35 TFSI A3 has identical performance, so the S line's higher group rating has nothing to do with speed.

It is repair economics. S line adds bespoke front and rear bumpers, sill extensions, a rear spoiler, 18-inch alloys (against 16s and 17s on lesser trims), sports suspension lowered by 15mm and a list price around £3,000–£4,000 above a Technik. Insurance group ratings weight parts prices and repair times heavily, so every one of those unique panels and larger wheels nudges the rating up: Technik A3s start at group 14, Sport spans 15–26, while the 35 TFSI S line is pinned at 20–23. The step to S tronic typically adds one further group — the gearbox and mild-hybrid hardware cost more to replace.

In cash terms the S line badge costs roughly £150–£250 a year at the mid-life driver benchmark versus the cheapest 35 TFSI trims — a premium worth knowing about before you spec the car, though modest next to what age does to the quote below.

2026 Premiums

Audi A3 35 TFSI S line insurance cost by driver age

Age moves the price of this trim far more than spec does. Typical comprehensive premiums for a clean single driver in a 35 TFSI S line (group 22, manual) in 2026:

Audi A3 35 TFSI S line insurance cost by driver age — UK 2026

A 17–20-year-old pays almost three times what a 50–69-year-old pays for the same car.

Source: composite of Finder UK and hamuch.com published A3 averages, ABI Q1 2026 Motor Premium Tracker and NimbleFins cost testing; Parkers/Thatcham group ratings.

Driver age	Typical premium (comprehensive)	Quoted range
17–20 years	£2,600	£1,900–£3,300
21–24 years	£1,850	£1,500–£2,200
25–29 years	£1,400	£1,150–£1,600
30–39 years	£1,100	£950–£1,250
40–49 years	£990	£850–£1,150
50–59 years	£900	£790–£1,020
60–69 years	£860	£750–£980
70+ years	£1,250	£1,050–£1,450

Clean licence, no claims, single driver, car kept at home overnight. Individual quotes vary with postcode, mileage, occupation and no-claims bonus.

Trim vs Trim

S line versus the other Audi A3 trims

If the badge matters less than the bill, the same A3 bodyshell can be insured for a lot less — or a lot more. Group ranges below are Parkers/Thatcham ratings for the 2020-on A3 Sportback; premiums are 2026 estimates for a clean 35–49-year-old:

A3 trim / engine	Insurance group	Typical premium
30 TFSI Sport (110PS)	14–17	£820–£1,100
Technik (range)	14–21	£850–£1,150
35 TFSI S line (150PS)	20–23	£1,050–£1,350
35 TDI S line (150PS diesel)	21–24	£1,080–£1,400
Black Edition (range)	21–26	£1,100–£1,450
40 TFSI e plug-in hybrid	24–29	£1,200–£1,550
S3 (310PS quattro)	~35–40	£1,500–£2,400

Source: Parkers/Thatcham insurance group listings, A3 Sportback 2020-on; premium estimates benchmarked against Finder UK and NimbleFins published A3 averages.

Trim-for-trim comparisons across the whole range, including the RS 3 and older generations, are in the full Audi A3 insurance guide.

Pay Less

Cheaper alternatives — and how to cut the cost of the one you want

If the ~£1,200 average stings, the honest options are a cheaper spec or a cheaper rival. An A3 30 TFSI Sport (groups 14–17) saves £200–£350 a year with the same cabin; a VW Golf 1.5 TSI — mechanically the A3's twin — sits several groups lower in mid trims and typically insures for £100–£250 less (see our VW Golf insurance guide). A Skoda Octavia or SEAT Leon with the same 1.5 engine undercuts both.

Set on the 35 TFSI S line? These levers reliably work in 2026:

Pick the manual — usually one group lower than the S tronic, worth £30–£60 a year.
Skip optional 19-inch wheels and styling packs; anything above standard S line spec can push the rating or count as a factory option insurers price up.
Declare mileage accurately — 6,000 honest miles beats a defaulted 10,000.
Raise the voluntary excess to £250–£500 if you could absorb it after a claim.
Park off-street overnight — the A3's desirability to thieves makes garaging worth more here than on cheaper cars.
Add an experienced named driver (never front — the main driver must be the real one).
Pay annually — monthly instalment APRs of 20–30% add £100+ to a £1,200 policy.
Compare 21–26 days before renewal, when quoted prices bottom out; under-25s should also price a black box policy, which typically saves 10–25% on a group 20+ car.

Stacked together, these routinely take 20–35% off a first quote — enough to bring a £1,300 S line premium under £1,000.

Common Questions

Audi A3 35 TFSI S line insurance FAQs

What insurance group is the Audi A3 35 TFSI S line in?

The 35 TFSI S line sits in insurance groups 20 to 23 on the 1-50 scale, according to Parkers and Thatcham group ratings for the 2020-on A3. Manual cars are typically rated 20-22 and S tronic automatics 21-23, with the exact group depending on model year and whether a Tech Pack is fitted. That is mid-range for the A3 family, which spans groups 14 to 47.

How much does it cost to insure an Audi A3 35 TFSI S line in 2026?

A clean 35-49-year-old driver typically pays £1,050-£1,350 a year on comprehensive cover — around £1,200 on average. Younger drivers pay far more: £1,500-£2,200 at 21-24 and £1,900-£3,300 at 17-20. For context, the typical UK comprehensive premium is about £600, so this trim runs at roughly double the national average.

Why is the S line more expensive to insure than a Technik or Sport A3?

Not performance — every 35 TFSI has the same 150PS engine. The S line's bespoke bumpers, sill extensions, rear spoiler, 18-inch alloys, lowered sports suspension and £3,000-£4,000 higher list price all raise repair costs, and repair economics drive group ratings. The result is a 2-6 group jump over Technik and Sport, worth roughly £150-£250 a year in premium.

Does the S tronic automatic cost more to insure than the manual?

Usually yes, by about one insurance group — S tronic 35 TFSI S lines are typically rated 21-23 against 20-22 for the manual. The automatic carries a higher list price and adds 48-volt mild-hybrid hardware, both of which increase repair and replacement costs. In premium terms the difference is modest, typically £30-£60 a year.

Is the Audi A3 35 TFSI S line a good car for a young driver to insure?

It is an expensive choice. At 17-20 expect £1,900-£3,300 a year, and at 21-24 £1,500-£2,200 — a group 20+ premium hatch is close to worst-case for new-driver pricing. A black box (telematics) policy typically saves 10-25% for under-25s, and a group 14-17 A3 30 TFSI or a lower-group rival cuts the bill much further.

How can I cut the cost of insuring an A3 35 TFSI S line?

Choose the manual over the S tronic, keep the standard 18-inch wheels, declare your real annual mileage, raise the voluntary excess, park off-street overnight, add an experienced named driver, pay annually rather than monthly, and compare quotes three to four weeks before renewal. Combined, these tactics routinely cut 20-35% off a first quote.

Do the S line bodykit and 18-inch alloys count as modifications?

No. S line styling, wheels and suspension are factory-fit standard equipment, already reflected in the car's group 20-23 rating, so there is nothing extra to declare. Anything added afterwards — different wheels, lowering springs, remaps, tints — is a modification and must be declared to your insurer, usually at extra cost.

Is the 35 TDI S line diesel cheaper to insure than the 35 TFSI petrol?

Slightly the opposite: the 150PS 35 TDI S line is rated at groups 21-24, one group or so above the petrol's 20-23, mainly because of its higher list price and stronger torque. Expect it to cost roughly £30-£50 more a year to insure — a difference high-mileage drivers usually recover at the pumps.

Sources & Standards

Our sources

Parkers / Thatcham Research — insurance group ratings for the Audi A3 Sportback (2020-on), including all 35 TFSI S line variants
ABI Motor Insurance Premium Tracker — Q1 2026 average comprehensive premium paid (£560)
Confused.com Price Index — June 2026 average quoted comprehensive premium (£719)
Finder UK & hamuch.com — published Audi A3 average premium data (£1,196 range-wide)
NimbleFins — Audi A3 running-cost and insurance analysis
Audi UK — 35 TFSI S line specification and list pricing

Reviewed by the Car Insurance Expert editorial team

Premium figures are a composite of published comparison-site and insurer data cross-checked against ABI and Confused.com indices; Thatcham group ratings are verified against current Parkers listings at each refresh. We do not yet publish Car Insurance Expert primary quote data for this model.

Last updated: 2026-07-28

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