There is no certain or exact answer to this question how long does it to finish writing a dissertation? It all depends upon the nature of the research and well the topic you select. However, the average time duration of finishing the Ph.D. dissertation is about 12 to 18 months. It is the vital thing to remember here that it is the time duration of writing. However, with research, this can take about 3 to 4 years. And it is a very long time. In addition, you can easily break this duration and finish your dissertation in less than 3 years with the complete support of Dissertation Writing Services UK.  They have a team of qualified Ph.D. writers and they can aid you.​