Apostille vs. Embassy legalisation for Tajikistan
Because this destination sits inside the treaty, there is one paid stage at the British end and nothing waiting behind it. An apostille from United Kingdom to Tajikistan comes from a single central office, and no consular desk adds a second fee afterwards. That simplicity moves the whole cost question to one place: how many separate papers you decide to put through. Everything about budgeting this route follows from that one count.
Tajikistan's Hague status & what it means
Tajikistan joined the Hague Apostille Convention in 2015, and the certificate has been read there as proof of origin ever since. Membership removes the chain of offices that would otherwise have to vouch for one another, so the timetable is short and the price list carries a single line. What it does not remove is the need to decide, before anything is sent, exactly which papers belong in the batch.
The Liverpool → Tajikistan route step by step
Liverpool Register Office keeps the city's civil register and can issue a fresh certified copy of a birth, marriage or death record, so the copy at home stays put. The FCDO Legalisation Office at PO Box 6255, Milton Keynes MK10 1XX then certifies the batch on behalf of the whole United Kingdom. It runs by post and has no counter, so one round trip can carry a full list rather than a single sheet.
Cost & timing for this route
Two figures are published and both are counted per document: £45 / document by standard post, and £40 / document on the next-day service open to registered businesses. The cheaper rate is not the general rate, because it is tied to registered businesses. Time does not scale with the list in the same way, since a batch of six travels in one envelope and waits in the same queue as a batch of one.