Hi Balusm,
I recreated your table and added five more columns of salary increase dates at the right end of your table.
Enter the following formula in E2 and then copy it down and across
=IF(AND(E$1>$C2,E$1<$D2),INDEX($B$8:$B$12,MATCH(E$1,$A$8:$A$12,0)),"")
The table is given below
[TABLE="width: 980"]
<colgroup><col><col><col span="7"></colgroup><tbody>[TR]
[TD]Person[/TD]
[TD]Salary[/TD]
[TD]Start[/TD]
[TD]End[/TD]
[TD="align: right"]6/04/2014[/TD]
[TD="align: right"]6/04/2015[/TD]
[TD="align: right"]6/04/2016[/TD]
[TD="align: right"]6/04/2017[/TD]
[TD="align: right"]6/04/2018[/TD]
[/TR]
[TR]
[TD="align: right"]1[/TD]
[TD="align: right"]50000[/TD]
[TD="align: right"]1/01/2015[/TD]
[TD="align: right"]1/06/2018[/TD]
[TD] [/TD]
[TD="align: right"]0%[/TD]
[TD="align: right"]2%[/TD]
[TD="align: right"]3%[/TD]
[TD="align: right"]5%[/TD]
[/TR]
[TR]
[TD="align: right"]2[/TD]
[TD="align: right"]40000[/TD]
[TD="align: right"]22/10/2014[/TD]
[TD="align: right"]1/06/2018[/TD]
[TD] [/TD]
[TD="align: right"]0%[/TD]
[TD="align: right"]2%[/TD]
[TD="align: right"]3%[/TD]
[TD="align: right"]5%[/TD]
[/TR]
[TR]
[TD="align: right"]3[/TD]
[TD="align: right"]30000[/TD]
[TD="align: right"]7/04/2015[/TD]
[TD="align: right"]1/06/2018[/TD]
[TD] [/TD]
[TD] [/TD]
[TD="align: right"]2%[/TD]
[TD="align: right"]3%[/TD]
[TD="align: right"]5%[/TD]
[/TR]
[TR]
[TD="align: right"]4[/TD]
[TD="align: right"]45000[/TD]
[TD="align: right"]8/04/2014[/TD]
[TD="align: right"]1/06/2018[/TD]
[TD] [/TD]
[TD="align: right"]0%[/TD]
[TD="align: right"]2%[/TD]
[TD="align: right"]3%[/TD]
[TD="align: right"]5%[/TD]
[/TR]
[TR]
[TD] [/TD]
[TD] [/TD]
[TD] [/TD]
[TD] [/TD]
[TD] [/TD]
[TD] [/TD]
[TD] [/TD]
[TD] [/TD]
[TD] [/TD]
[/TR]
[TR]
[TD] [/TD]
[TD] [/TD]
[TD] [/TD]
[TD] [/TD]
[TD] [/TD]
[TD] [/TD]
[TD] [/TD]
[TD] [/TD]
[TD] [/TD]
[/TR]
[TR]
[TD="align: right"]6/04/2018[/TD]
[TD="align: right"]5%[/TD]
[TD] [/TD]
[TD] [/TD]
[TD] [/TD]
[TD] [/TD]
[TD] [/TD]
[TD] [/TD]
[TD] [/TD]
[/TR]
[TR]
[TD="align: right"]6/04/2017[/TD]
[TD="align: right"]3%[/TD]
[TD] [/TD]
[TD] [/TD]
[TD] [/TD]
[TD] [/TD]
[TD] [/TD]
[TD] [/TD]
[TD] [/TD]
[/TR]
[TR]
[TD="align: right"]6/04/2016[/TD]
[TD="align: right"]2%[/TD]
[TD] [/TD]
[TD] [/TD]
[TD] [/TD]
[TD] [/TD]
[TD] [/TD]
[TD] [/TD]
[TD] [/TD]
[/TR]
[TR]
[TD="align: right"]6/04/2015[/TD]
[TD="align: right"]0%[/TD]
[TD] [/TD]
[TD] [/TD]
[TD] [/TD]
[TD] [/TD]
[TD] [/TD]
[TD] [/TD]
[TD] [/TD]
[/TR]
[TR]
[TD="align: right"]6/04/2014[/TD]
[TD="align: right"]6%[/TD]
[TD] [/TD]
[TD] [/TD]
[TD] [/TD]
[TD] [/TD]
[TD] [/TD]
[TD] [/TD]
[TD] [/TD]
[/TR]
[TR]
[TD] [/TD]
[TD] [/TD]
[TD] [/TD]
[TD] [/TD]
[TD] [/TD]
[TD] [/TD]
[TD] [/TD]
[TD] [/TD]
[TD] [/TD]
[/TR]
[TR]
[TD] [/TD]
[TD]
[/TD]
[TD] [/TD]
[TD] [/TD]
[TD] [/TD]
[TD] [/TD]
[TD] [/TD]
[TD] [/TD]
[TD] [/TD]
[/TR]
</tbody>[/TABLE]