Q: Can I go overseas before I have all my funds raised?

answer this question

A: No. Aim for 110%.

Answer from Rob who has served ten years with Operation Mobilization.
It is better for you to shoot for 110% of your support and to have these funds committed before you leave for the field. Most missionaries lose 5-15% of their support during the first two years on the field, so leaving home before you are at least fully funded is a recipe for financial disaster. God has all the money you need to serve in missions, but sadly it is in other people’s wallets and many of them forgot to have their wallets baptized.

A: No. Going without full support is not wise.

Answer from J.B. who serves in the former Soviet Union.
Maintaining funds on the field can be difficult enough, but trying to raise additional funds while on the field is even harder. One of my colleagues went to the field at 80% because she felt she was under a time crunch to get to the field and suddenly, she barely had enough money for food. In addition, the currency exchange rate was suffering. She was forced to go back home to raise more support. I would highly suggest not only being fully supported, but having some funds built up in your account to take care of supporters who either are late on gifts or who end their support.

A: Yes. Trust God for all your financial needs.

Answer from Carol who has served with Team for 32 years in Sri Lanka, India, Persian Gulf.
My husband and I have been with a faith mission for 32 years. We have yet to be without all that we have ever needed. Has our support always been 100%? Perhaps not for what we wanted, but for what we have needed. Many mission agencies allow you to go to your assigned country with 80% of your financial support raised. You may feel, "I just can't go unless I have the 100% because how will I make ends meet?" If that is your question, then you may be trusting more in the money than you are in God who has promised to provide all you need.

Some see their support jump to full after they leave their home country. God wants to know that we are willing to be obedient to Him and trust Him to provide. The time is short and so many people need to hear the Good News. Don't limit God. Do your part, share the ministry, stay in contact with all the people God leads you to write and call and leave the rest to Him. Don't allow the pressures to build to where you are "begging" to be able to go to your assigned country. Pray and move ahead. God will provide all you need by either moving in the hearts of His people to support you or He will provide in other practical ways.