UK buying shortlist
Best Office Chairs Under £400 in the UK (2026)
Written by Work & DIY Desk Work and DIY editorial desk · Office Chairs beat · reviewed 21/08/2026
Four exact current configurations selected for office-chair configurations with an independently verified current exact-product price at or below £400, with source, image and acquisition evidence kept configuration-bound.
Quick answer · Top 4
Compare all four options
Retailer buttons are affiliate links and may earn commission. Official references and product details explain identity, specifications and buying checks; they do not confirm live price, stock or universal fit.
Pick 1 - Sihoo M102C Ergonomic Chair exact configuration
Sihoo M102C Ergonomic Chair — Black — M102C-M101
Check price on AmazonAt a glance:Exact direct-store configuration with the manufacturer-listed feature: The Sihoo M102C is designed to offer excellent lower back support while maintaining an elegant and minimalist appearance.
Trade-off:The exact manufacturer record establishes the listed configuration and feature only; it does not establish comparative performance, reliability, safety, comfort or value.
Pick 2 - Sihoo M18 Classic Office Chair exact configuration
Sihoo M18 Classic Office Chair — Black — M18-M148
At a glance:Exact direct-store configuration with the manufacturer-listed feature: a breathable mesh seatback
Trade-off:The exact manufacturer record establishes the listed configuration and feature only; it does not establish comparative performance, reliability, safety, comfort or value.
Official reference; not an affiliate buying link.
Compare all 4 picks
Pick 3 - Sihoo M57 Classic Office Chair exact configuration
Sihoo M57 Classic Office Chair — Black — M57-M111
At a glance:Exact direct-store configuration with the manufacturer-listed feature: Max load 150 kg / 330 lbs.
Trade-off:The exact manufacturer record establishes the listed configuration and feature only; it does not establish comparative performance, reliability, safety, comfort or value.
Official reference; not an affiliate buying link.
Compare all 4 picks
Pick 4 - Sihoo B100 Pro Ergonomic Office Chair With Flip-Up Armrest exact configuration
Sihoo B100 Pro Ergonomic Office Chair With Flip-Up Armrest — Black / Footrest — B100-PRO-M101-JT
At a glance:Exact direct-store configuration with the manufacturer-listed feature: Dynamic Lumbar Support That Moves With You .
Trade-off:The exact manufacturer record establishes the listed configuration and feature only; it does not establish comparative performance, reliability, safety, comfort or value.
Official reference; not an affiliate buying link.
Compare all 4 picksWork & DIY Desk: before you choose: Confirm the exact dimensions, materials and safe-use limits before deciding between the listed options.
Decision checks: measurements and materials · task fit · safe-use boundaries
The shortlist
Four options, with the trade-offs visible
Use the fit, limitations and checkout checks before opening a retailer page. Confirm the current price, stock, delivery and returns with the retailer.
Pick 1
First comparison point
Sihoo M102C Ergonomic Chair exact configuration
Sihoo M102C Ergonomic Chair — Black — M102C-M101
Sihoo M102C Ergonomic Chair fills role 1 with exact manufacturer fact “Sihoo M102C Ergonomic Chair”.
Affiliate retailer link. Check current price, stock, delivery and returns before buying.
Highlights
- Exact direct-store configuration with the manufacturer-listed feature: The Sihoo M102C is designed to offer excellent lower back support while maintaining an elegant and minimalist appearance.
Drawbacks
- The exact manufacturer record establishes the listed configuration and feature only; it does not establish comparative performance, reliability, safety, comfort or value.
Buyer fit
Best for
- Exact direct-store configuration with the manufacturer-listed feature: The Sihoo M102C is designed to offer excellent lower back support while maintaining an elegant and minimalist appearance.
Not for you if
- The exact manufacturer record establishes the listed configuration and feature only; it does not establish comparative performance, reliability, safety, comfort or value.
Check before buying
- Confirm M102C-M101, the selected display, ports, stand, stock, warranty and returns.
Pick 2
Sihoo M18 Classic Office Chair exact configuration
Sihoo M18 Classic Office Chair — Black — M18-M148
Sihoo M18 Classic Office Chair fills role 2 with exact manufacturer fact “Sihoo M18 Classic Office Chair”.
Highlights
- Exact direct-store configuration with the manufacturer-listed feature: a breathable mesh seatback
Drawbacks
- The exact manufacturer record establishes the listed configuration and feature only; it does not establish comparative performance, reliability, safety, comfort or value.
Buyer fit
Best for
- Exact direct-store configuration with the manufacturer-listed feature: a breathable mesh seatback
Not for you if
- The exact manufacturer record establishes the listed configuration and feature only; it does not establish comparative performance, reliability, safety, comfort or value.
Check before buying
- Confirm M18-M148, stock, warranty and returns.
Pick 3
Sihoo M57 Classic Office Chair exact configuration
Sihoo M57 Classic Office Chair — Black — M57-M111
Sihoo M57 Classic Office Chair fills role 3 with exact manufacturer fact “Sihoo M57 Classic Office Chair”.
Highlights
- Exact direct-store configuration with the manufacturer-listed feature: Max load 150 kg / 330 lbs.
Drawbacks
- The exact manufacturer record establishes the listed configuration and feature only; it does not establish comparative performance, reliability, safety, comfort or value.
Buyer fit
Best for
- Exact direct-store configuration with the manufacturer-listed feature: Max load 150 kg / 330 lbs.
Not for you if
- The exact manufacturer record establishes the listed configuration and feature only; it does not establish comparative performance, reliability, safety, comfort or value.
Check before buying
- Confirm M57-M111, stock, warranty and returns.
Pick 4
Sihoo B100 Pro Ergonomic Office Chair With Flip-Up Armrest exact configuration
Sihoo B100 Pro Ergonomic Office Chair With Flip-Up Armrest — Black / Footrest — B100-PRO-M101-JT
Sihoo B100 Pro Ergonomic Office Chair With Flip-Up Armrest fills role 4 with exact manufacturer fact “Sihoo B100 Pro Ergonomic Office Chair With Flip-Up Armrest”.
Highlights
- Exact direct-store configuration with the manufacturer-listed feature: Dynamic Lumbar Support That Moves With You .
Drawbacks
- The exact manufacturer record establishes the listed configuration and feature only; it does not establish comparative performance, reliability, safety, comfort or value.
Buyer fit
Best for
- Exact direct-store configuration with the manufacturer-listed feature: Dynamic Lumbar Support That Moves With You .
Not for you if
- The exact manufacturer record establishes the listed configuration and feature only; it does not establish comparative performance, reliability, safety, comfort or value.
Check before buying
- Confirm B100-PRO-M101-JT, stock, warranty and returns.
Top 4 comparison
Compare the useful differences, trade-offs and final checks side by side.
Before you compare
Check these first
- 1Confirm the exact model, route fact, physical fit, supplied parts, stock, warranty and returns.
- 2Use independent exact-model testing for measured performance, safety, durability, comfort, noise and reliability.
Your four roles
View specs & trade-offs
Trade-off:The exact manufacturer record establishes the listed configuration and feature only; it does not establish comparative performance, reliability, safety, comfort or value.
Not ideal for:The exact manufacturer record establishes the listed configuration and feature only; it does not establish comparative performance, reliability, safety, comfort or value.
Check:Confirm M102C-M101, the selected display, ports, stand, stock, warranty and returns.
Warranty and support:Confirm the manufacturer's current UK warranty and return terms for M102C-M101. • Exact official configuration and current UK Product surface checked 2026-08-21.
Sources:https://uk.sihoo.com/products/sihoo-m102-ergonomic-office-chair-next-level.js?variant=51569257382256.
View specs & trade-offs
Trade-off:The exact manufacturer record establishes the listed configuration and feature only; it does not establish comparative performance, reliability, safety, comfort or value.
Not ideal for:The exact manufacturer record establishes the listed configuration and feature only; it does not establish comparative performance, reliability, safety, comfort or value.
Check:Confirm M18-M148, stock, warranty and returns.
Warranty and support:Confirm the manufacturer's current UK warranty and return terms for M18-M148. • Exact official configuration and current UK Product surface checked 2026-08-22.
Sources:https://uk.sihoo.com/products/sihoo-m18-classic-office-chair.js?variant=53169101046128.
View specs & trade-offs
Trade-off:The exact manufacturer record establishes the listed configuration and feature only; it does not establish comparative performance, reliability, safety, comfort or value.
Not ideal for:The exact manufacturer record establishes the listed configuration and feature only; it does not establish comparative performance, reliability, safety, comfort or value.
Check:Confirm M57-M111, stock, warranty and returns.
Warranty and support:Confirm the manufacturer's current UK warranty and return terms for M57-M111. • Exact official configuration and current UK Product surface checked 2026-08-22.
Sources:https://uk.sihoo.com/products/sihoo-m57-classic-office-chair.js?variant=53169101341040.
View specs & trade-offs
Trade-off:The exact manufacturer record establishes the listed configuration and feature only; it does not establish comparative performance, reliability, safety, comfort or value.
Not ideal for:The exact manufacturer record establishes the listed configuration and feature only; it does not establish comparative performance, reliability, safety, comfort or value.
Check:Confirm B100-PRO-M101-JT, stock, warranty and returns.
Warranty and support:Confirm the manufacturer's current UK warranty and return terms for B100-PRO-M101-JT. • Exact official configuration and current UK Product surface checked 2026-08-22.
Sources:https://uk.sihoo.com/products/sihoo-b100-pro-classic-office-chair.js?variant=53482266263920.
| Pick | Pick role | Best for | Avoid if | Key trade-off | Check before buying | Warranty/support status | Review/evidence basis | Retailer |
|---|---|---|---|---|---|---|---|---|
| 1. Sihoo M102C Ergonomic Chair — Black — M102C-M101 | Sihoo M102C Ergonomic Chair exact configuration | Exact direct-store configuration with the manufacturer-listed feature: The Sihoo M102C is designed to offer excellent lower back support while maintaining an elegant and minimalist appearance. | The exact manufacturer record establishes the listed configuration and feature only; it does not establish comparative performance, reliability, safety, comfort or value. | The exact manufacturer record establishes the listed configuration and feature only; it does not establish comparative performance, reliability, safety, comfort or value. | Confirm M102C-M101, the selected display, ports, stand, stock, warranty and returns. | Confirm the manufacturer's current UK warranty and return terms for M102C-M101. • Exact official configuration and current UK Product surface checked 2026-08-21. | https://uk.sihoo.com/products/sihoo-m102-ergonomic-office-chair-next-level.js?variant=51569257382256 | Check current price |
| 2. Sihoo M18 Classic Office Chair — Black — M18-M148 | Sihoo M18 Classic Office Chair exact configuration | Exact direct-store configuration with the manufacturer-listed feature: a breathable mesh seatback | The exact manufacturer record establishes the listed configuration and feature only; it does not establish comparative performance, reliability, safety, comfort or value. | The exact manufacturer record establishes the listed configuration and feature only; it does not establish comparative performance, reliability, safety, comfort or value. | Confirm M18-M148, stock, warranty and returns. | Confirm the manufacturer's current UK warranty and return terms for M18-M148. • Exact official configuration and current UK Product surface checked 2026-08-22. | https://uk.sihoo.com/products/sihoo-m18-classic-office-chair.js?variant=53169101046128 | No retailer link |
| 3. Sihoo M57 Classic Office Chair — Black — M57-M111 | Sihoo M57 Classic Office Chair exact configuration | Exact direct-store configuration with the manufacturer-listed feature: Max load 150 kg / 330 lbs. | The exact manufacturer record establishes the listed configuration and feature only; it does not establish comparative performance, reliability, safety, comfort or value. | The exact manufacturer record establishes the listed configuration and feature only; it does not establish comparative performance, reliability, safety, comfort or value. | Confirm M57-M111, stock, warranty and returns. | Confirm the manufacturer's current UK warranty and return terms for M57-M111. • Exact official configuration and current UK Product surface checked 2026-08-22. | https://uk.sihoo.com/products/sihoo-m57-classic-office-chair.js?variant=53169101341040 | No retailer link |
| 4. Sihoo B100 Pro Ergonomic Office Chair With Flip-Up Armrest — Black / Footrest — B100-PRO-M101-JT | Sihoo B100 Pro Ergonomic Office Chair With Flip-Up Armrest exact configuration | Exact direct-store configuration with the manufacturer-listed feature: Dynamic Lumbar Support That Moves With You . | The exact manufacturer record establishes the listed configuration and feature only; it does not establish comparative performance, reliability, safety, comfort or value. | The exact manufacturer record establishes the listed configuration and feature only; it does not establish comparative performance, reliability, safety, comfort or value. | Confirm B100-PRO-M101-JT, stock, warranty and returns. | Confirm the manufacturer's current UK warranty and return terms for B100-PRO-M101-JT. • Exact official configuration and current UK Product surface checked 2026-08-22. | https://uk.sihoo.com/products/sihoo-b100-pro-classic-office-chair.js?variant=53482266263920 | No retailer link |
Choose this if / Avoid this if
Rule out poor-fit options before comparing finer details.
Avoid if
- You need a complete whole-market survey rather than a source-closed exact cohort.
- You need an outcome that is not explicit in the manufacturer record.
Dealbreakers
- The selected fact belongs to a sibling or family record.
- The Product destination resolves to another exact identity.
Check before buying
- Confirm the exact model, route fact, physical fit, supplied parts, stock, warranty and returns.
- Use independent exact-model testing for measured performance, safety, durability, comfort, noise and reliability.
Choose another shortlist if
- Choose the broad category route when no specialist fact is decisive.
- Choose another specialist route when its exact workflow is the hard requirement.
When another role fits better
The first option is a useful starting point, not a universal winner. Move another role ahead when its use case, fit or ownership trade-offs match you better.
Known limitations
UK Shortlists has not conducted first-party performance, safety, durability, acoustic, ergonomic or reliability testing. This is a source-bound exact-configuration comparison.
Find another route
If your priorities differ, compare this starting point with Best Office Chairs in the UK (2026): Four Fit Routes.
How we chose
The checks behind the four picks
Qualification requires office-chair configurations with an independently verified current exact-product price at or below £400; the exact option fact and official image must remain attached to the selected identity.
- Step 1: Exact option-defining manufacturer fact
- Step 2: Same-record supporting facts
- Step 3: Distinct stable configuration role
- Step 4: Official image and current exact Product surface
Disclosure
Last reviewed: 21/08/2026
UK Shortlists may earn a commission when you use some retailer links. This does not increase the price you pay.
As an Amazon Associate we earn from qualifying purchases.
Retailers cannot pay to change which products we recommend or their order.
Prices, stock, delivery and returns can change. Confirm the final details with the retailer before buying.
Read more about how UK Shortlists makes money, retailer checks, and how corrections are handled.
Who checked this shortlist?
- Written / compiled by:
- Work & DIY Desk
- Reviewed by:
- UK Shortlists Editorial Team
- Last reviewed:
- 21/08/2026
- Review basis:
- Criteria-based comparison
We compare published product information, retailer details and the buying criteria shown above. UK Shortlists does not currently publish claims based on first-party product use, laboratory testing or long-term testing.
FAQs & alternatives
What does qualification establish?
It establishes that the exact selected manufacturer record publishes the route-defining and supporting product facts.
Does a listed specification prove real-world performance?
No. Measured outcomes require independent exact-model testing.
Are roles based on temporary discounts?
No. Roles are price-free and current purchase state is checked independently.
Also consider
- Use the broad category shortlist for a general starting point.
- Use another exact-feature route when a different workflow is decisive.
Newsletter
Want the next useful buying check?
Get occasional UK Shortlists updates for decisions like this. Unsubscribe at any time.
Compare before choosing
Compare the routes that match your budget, priorities or setup before deciding which shortlist is the best fit.
Compare this next: Best Office Chairs in the UK (2026): Four Fit Routes
Other routes to compare
- Best Budget Office Chairs in the UK (2026)
- Best Office Chairs Under £300 in the UK (2026)
Use this if your fixed price ceiling is more important than broad feature depth.