is that the initial budget? Because the board sets your initial budgets shortly after the season ends, and the final one sometime in June I think. If it is the final budget, then go check your bank balances on the finances page. Is it in the red because you spent like crazy in the first season? If it is, then clearly they can't give you money that you don't actually have. If you have a decent bank balance, and are still only getting 300k to spend, go to the board and ask them for a bigger transfer budget. If that fails too, you have to consider selling some of your players that you can get better, cheaper replacements for and start making money that way.