If the combined weight of your vehicle and trailer remains under 3500kg, no additional vignette is required. If the combined weight is over 3500kg, then you will need an additional vignette.
You can buy your vignette several months before you leave. However, due to regulations, we can only issue the vignette one month before the effective date at the earliest.
Depending on the duration of your journey, you can buy a vignette for seven days, one month, three months, or a year. At https://evignette.co.uk/vignette-bulgaria/, we calculate the most economical option for you.