Simultaneous vs consecutive interpretation: what each costs

Simultaneous interpretation is the one with booths and headsets: the interpreter speaks at almost the same time as the presenter, and the audience listens on receivers. Consecutive interpretation needs no equipment at all — the speaker pauses every minute or two while the interpreter renders what was said — but it roughly doubles the running time of your event. Here is what each mode involves, what it costs in Hong Kong, and how to choose.

The terms first

Hong Kong quotes and venue documents mix several names, so align them before comparing prices:

• Simultaneous interpretation (SI). In Chinese materials this appears as 同聲傳譯, 即時傳譯 or 同步傳譯 — all three are the same service. Local agencies often write it as “同聲傳譯（或即時傳譯）”, so a quote headed “instant interpretation” is almost certainly simultaneous.¹²
• Consecutive interpretation (CI), also called 交替傳譯 or 接續傳譯.
• Whispered interpretation — simultaneous without the equipment, for one or two listeners.
• Remote interpretation (RSI) — simultaneous with the interpreters off-site.

There is also escort or liaison interpreting — accompanying a guest through visits, meals and factory tours — which is priced and staffed differently from conference work and is not covered here.

How simultaneous interpretation works

Interpreters sit in a soundproof booth, listen to the speaker on headphones and render the other language into a microphone almost in real time. Each listener gets a receiver and headset and picks a channel. The whole setup has three parts: the interpreters, the equipment (booth, console, transmitter, receivers), and a technician to run it.

Two trade facts directly affect your budget:

• Simultaneous interpreters work in pairs. Listening, processing and rendering happen at the same time, and the concentration cannot be sustained for long. One Hong Kong agency states plainly that an interpreter holds this state for about fifteen minutes before needing a partner to take over; the industry norm is a rotation every twenty to thirty minutes, so a sustained conference needs two — sometimes three — interpreters per language.²³
• A short meeting can use one interpreter, with a ceiling. Experienced interpreters can cover thirty to sixty minutes alone; beyond that, insisting on one interpreter is a bet against quality.²

How consecutive interpretation works

Consecutive needs no equipment. The speaker talks for a short segment — typically thirty seconds to a few minutes — pauses, and the interpreter renders it in the other language. Speeches, press conferences, small meetings, award ceremonies and guided tours mostly use this mode.

The cost is twofold. First, the event roughly doubles in length — everything is said twice, so an hour of content becomes nearly two, and venue hire has to be booked accordingly. Second, it depends on speaker discipline: a speaker who forgets to pause and talks for ten minutes forces the interpreter to compress, and content is lost. If you book consecutive, the organiser needs to brief speakers on where to stop.

Whispered and remote interpretation

Whispered interpretation: the interpreter sits beside the one or two attendees who need translation and renders quietly in real time. It needs no equipment at all. But agencies themselves warn that in a noisy room, whispered interpreting without equipment is an extreme load on the interpreter, and it stops working once more than two or three listeners need it.²

Remote interpretation (RSI): the interpreters are off-site, working through a platform, and the audience listens on computers or phones. It removes travel and the booth, but interpreter fees and minimum bookings remain — in the US market, remote human interpretation is commonly quoted at US$100 to US$200 per hour with a two-hour minimum.⁴

What each mode costs in Hong Kong

The equipment line is worth pricing separately, because your venue may already have a built-in system. Two published Hong Kong figures: East Kowloon Cultural Centre’s hire charges list the simultaneous interpretation system at HK$8,200 per day (The Hall and The Theatre only); the Chinese University of Hong Kong’s Audio Visual Services Unit charges external users HK$2,570 per three-hour block including 30 receivers and headphones, plus HK$635 per additional hour and HK$430 per hour for a standby technician.⁶⁷ A fuller breakdown is in our equipment rental guide, and the hiring process plus complete cost structure is in what simultaneous interpretation costs in Hong Kong.

For international reference, published UK conference interpreting rates sit around £600–£1,200 per interpreter per day, with a minimum of two interpreters per language for simultaneous work and equipment hire at £500–£2,000 per day.⁸

Which mode your event needs

• Full-day conferences, large seminars, tight schedules: simultaneous. With more than a handful of listeners and an agenda that cannot stretch, it is the only option.
• Speeches, press conferences, small formal sessions: consecutive. You save the entire equipment budget; the price is doubled duration.
• Only one or two guests need translation: whispered, or a caption solution they can read.
• Interpreters would have to travel, or the budget cannot carry a booth: remote interpretation or an AI option.

What this means for a Hong Kong organiser

If the goal is “the audience follows in a second language” rather than “the occasion requires human interpreters”, there is one more option with no booth and no receivers: AI translation delivers captions and a translated voice straight to the audience’s own phones. tlive charges by credits — captions cost 1 credit per minute and one translated voice 4 — the packs are on the pricing page and the scan-and-listen flow is in how it works.

The boundary is worth stating plainly: legal proceedings, medical or safety briefings, signing ceremonies and high-protocol events are the right spend for human interpreters. AI suits the “understood is enough” cases — business meetings, seminars, internal training and livestreams.

Frequently asked questions

Is “instant interpretation” the same as simultaneous?

In Hong Kong, yes — 即時傳譯 and 同聲傳譯 are two names for one service, and agencies list them together.¹² The real comparison is simultaneous versus consecutive.

Can one interpreter cover a one- or two-hour meeting?

Yes, up to a point. Experienced interpreters can work alone for thirty to sixty minutes; beyond an hour, insisting on one interpreter is a bet against quality.²

Can we skip the equipment if only a few attendees need translation?

Yes — that is what whispered interpretation is for: the interpreter sits beside the attendees and renders quietly. It degrades in noisy rooms and does not scale past two or three listeners.²

Why does simultaneous interpretation need two interpreters?

Listening, processing and rendering run concurrently at very high intensity; interpreters rotate every twenty to thirty minutes.²³

Comparing remote suppliers? Our remote interpretation platform comparison separates human interpreter services, AI packages and event support.